annotate contrib/chg/hgclient.c @ 28789:7f6e0a15189b

chg: replace abortmsg showing errno with abortmsgerrno Since we have abortmsgerrno now, use it to show human friendly error messages across platforms.
author Jun Wu <quark@fb.com>
date Tue, 05 Apr 2016 15:16:01 +0100
parents 222f482930c8
children f5764e177bbe
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * A command server client that uses Unix domain socket
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3 *
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4 * Copyright (c) 2011 Yuya Nishihara <yuya@tcha.org>
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5 *
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6 * This software may be used and distributed according to the terms of the
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7 * GNU General Public License version 2 or any later version.
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8 */
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9
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10 #include <arpa/inet.h> /* for ntohl(), htonl() */
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11 #include <assert.h>
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12 #include <ctype.h>
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13 #include <errno.h>
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14 #include <fcntl.h>
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15 #include <signal.h>
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16 #include <stdint.h>
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17 #include <stdio.h>
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18 #include <stdlib.h>
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19 #include <string.h>
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20 #include <sys/socket.h>
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21 #include <sys/stat.h>
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22 #include <sys/un.h>
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23 #include <unistd.h>
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24
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25 #include "hgclient.h"
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26 #include "util.h"
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27
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28 enum {
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29 CAP_GETENCODING = 0x0001,
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30 CAP_RUNCOMMAND = 0x0002,
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31 /* cHg extension: */
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32 CAP_ATTACHIO = 0x0100,
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33 CAP_CHDIR = 0x0200,
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34 CAP_GETPAGER = 0x0400,
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35 CAP_SETENV = 0x0800,
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36 CAP_SETUMASK = 0x1000,
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37 CAP_VALIDATE = 0x2000,
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38 };
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39
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40 typedef struct {
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41 const char *name;
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42 unsigned int flag;
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43 } cappair_t;
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44
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45 static const cappair_t captable[] = {
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46 {"getencoding", CAP_GETENCODING},
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47 {"runcommand", CAP_RUNCOMMAND},
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48 {"attachio", CAP_ATTACHIO},
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49 {"chdir", CAP_CHDIR},
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50 {"getpager", CAP_GETPAGER},
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51 {"setenv", CAP_SETENV},
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52 {"setumask", CAP_SETUMASK},
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53 {"validate", CAP_VALIDATE},
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54 {NULL, 0}, /* terminator */
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55 };
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56
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57 typedef struct {
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58 char ch;
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59 char *data;
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60 size_t maxdatasize;
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61 size_t datasize;
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62 } context_t;
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63
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64 struct hgclient_tag_ {
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65 int sockfd;
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66 pid_t pid;
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67 context_t ctx;
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68 unsigned int capflags;
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69 };
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70
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71 static const size_t defaultdatasize = 4096;
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72
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73 static void initcontext(context_t *ctx)
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74 {
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75 ctx->ch = '\0';
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76 ctx->data = malloc(defaultdatasize);
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77 ctx->maxdatasize = (ctx->data) ? defaultdatasize : 0;
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78 ctx->datasize = 0;
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79 debugmsg("initialize context buffer with size %zu", ctx->maxdatasize);
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80 }
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81
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82 static void enlargecontext(context_t *ctx, size_t newsize)
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83 {
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84 if (newsize <= ctx->maxdatasize)
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85 return;
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86
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87 newsize = defaultdatasize
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88 * ((newsize + defaultdatasize - 1) / defaultdatasize);
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89 ctx->data = reallocx(ctx->data, newsize);
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90 ctx->maxdatasize = newsize;
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91 debugmsg("enlarge context buffer to %zu", ctx->maxdatasize);
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92 }
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93
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94 static void freecontext(context_t *ctx)
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95 {
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96 debugmsg("free context buffer");
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97 free(ctx->data);
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98 ctx->data = NULL;
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99 ctx->maxdatasize = 0;
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100 ctx->datasize = 0;
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101 }
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102
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103 /* Read channeled response from cmdserver */
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104 static void readchannel(hgclient_t *hgc)
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105 {
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106 assert(hgc);
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107
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108 ssize_t rsize = recv(hgc->sockfd, &hgc->ctx.ch, sizeof(hgc->ctx.ch), 0);
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109 if (rsize != sizeof(hgc->ctx.ch)) {
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110 /* server would have exception and traceback would be printed */
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111 debugmsg("failed to read channel");
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112 exit(255);
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113 }
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114
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115 uint32_t datasize_n;
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116 rsize = recv(hgc->sockfd, &datasize_n, sizeof(datasize_n), 0);
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117 if (rsize != sizeof(datasize_n))
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118 abortmsg("failed to read data size");
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119
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120 /* datasize denotes the maximum size to write if input request */
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121 hgc->ctx.datasize = ntohl(datasize_n);
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122 enlargecontext(&hgc->ctx, hgc->ctx.datasize);
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123
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124 if (isupper(hgc->ctx.ch) && hgc->ctx.ch != 'S')
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125 return; /* assumes input request */
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126
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127 size_t cursize = 0;
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128 while (cursize < hgc->ctx.datasize) {
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129 rsize = recv(hgc->sockfd, hgc->ctx.data + cursize,
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130 hgc->ctx.datasize - cursize, 0);
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131 if (rsize < 0)
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132 abortmsg("failed to read data block");
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133 cursize += rsize;
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134 }
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135 }
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136
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137 static void sendall(int sockfd, const void *data, size_t datasize)
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138 {
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139 const char *p = data;
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140 const char *const endp = p + datasize;
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141 while (p < endp) {
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142 ssize_t r = send(sockfd, p, endp - p, 0);
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143 if (r < 0)
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144 abortmsgerrno("cannot communicate");
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145 p += r;
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146 }
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147 }
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148
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149 /* Write lengh-data block to cmdserver */
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150 static void writeblock(const hgclient_t *hgc)
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151 {
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152 assert(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
153
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
154 const uint32_t datasize_n = htonl(hgc->ctx.datasize);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
155 sendall(hgc->sockfd, &datasize_n, sizeof(datasize_n));
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
156
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
157 sendall(hgc->sockfd, hgc->ctx.data, hgc->ctx.datasize);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
158 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
159
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
160 static void writeblockrequest(const hgclient_t *hgc, const char *chcmd)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
161 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
162 debugmsg("request %s, block size %zu", chcmd, hgc->ctx.datasize);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
163
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
164 char buf[strlen(chcmd) + 1];
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
165 memcpy(buf, chcmd, sizeof(buf) - 1);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
166 buf[sizeof(buf) - 1] = '\n';
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
167 sendall(hgc->sockfd, buf, sizeof(buf));
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
168
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
169 writeblock(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
170 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
171
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
172 /* Build '\0'-separated list of args. argsize < 0 denotes that args are
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
173 * terminated by NULL. */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
174 static void packcmdargs(context_t *ctx, const char *const args[],
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
175 ssize_t argsize)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
176 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
177 ctx->datasize = 0;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
178 const char *const *const end = (argsize >= 0) ? args + argsize : NULL;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
179 for (const char *const *it = args; it != end && *it; ++it) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
180 const size_t n = strlen(*it) + 1; /* include '\0' */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
181 enlargecontext(ctx, ctx->datasize + n);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
182 memcpy(ctx->data + ctx->datasize, *it, n);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
183 ctx->datasize += n;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
184 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
185
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
186 if (ctx->datasize > 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
187 --ctx->datasize; /* strip last '\0' */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
188 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
189
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
190 /* Extract '\0'-separated list of args to new buffer, terminated by NULL */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
191 static const char **unpackcmdargsnul(const context_t *ctx)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
192 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
193 const char **args = NULL;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
194 size_t nargs = 0, maxnargs = 0;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
195 const char *s = ctx->data;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
196 const char *e = ctx->data + ctx->datasize;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
197 for (;;) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
198 if (nargs + 1 >= maxnargs) { /* including last NULL */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
199 maxnargs += 256;
28166
c6e0c2533e5f chg: use mallocx and reallocx in hgclient
Jun Wu <quark@fb.com>
parents: 28160
diff changeset
200 args = reallocx(args, maxnargs * sizeof(args[0]));
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
201 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
202 args[nargs] = s;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
203 nargs++;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
204 s = memchr(s, '\0', e - s);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
205 if (!s)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
206 break;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
207 s++;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
208 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
209 args[nargs] = NULL;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
210 return args;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
211 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
212
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
213 static void handlereadrequest(hgclient_t *hgc)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
214 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
215 context_t *ctx = &hgc->ctx;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
216 size_t r = fread(ctx->data, sizeof(ctx->data[0]), ctx->datasize, stdin);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
217 ctx->datasize = r;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
218 writeblock(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
219 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
220
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
221 /* Read single-line */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
222 static void handlereadlinerequest(hgclient_t *hgc)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
223 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
224 context_t *ctx = &hgc->ctx;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
225 if (!fgets(ctx->data, ctx->datasize, stdin))
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
226 ctx->data[0] = '\0';
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
227 ctx->datasize = strlen(ctx->data);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
228 writeblock(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
229 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
230
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
231 /* Execute the requested command and write exit code */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
232 static void handlesystemrequest(hgclient_t *hgc)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
233 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
234 context_t *ctx = &hgc->ctx;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
235 enlargecontext(ctx, ctx->datasize + 1);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
236 ctx->data[ctx->datasize] = '\0'; /* terminate last string */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
237
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
238 const char **args = unpackcmdargsnul(ctx);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
239 if (!args[0] || !args[1])
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
240 abortmsg("missing command or cwd in system request");
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
241 debugmsg("run '%s' at '%s'", args[0], args[1]);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
242 int32_t r = runshellcmd(args[0], args + 2, args[1]);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
243 free(args);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
244
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
245 uint32_t r_n = htonl(r);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
246 memcpy(ctx->data, &r_n, sizeof(r_n));
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
247 ctx->datasize = sizeof(r_n);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
248 writeblock(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
249 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
250
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
251 /* Read response of command execution until receiving 'r'-esult */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
252 static void handleresponse(hgclient_t *hgc)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
253 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
254 for (;;) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
255 readchannel(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
256 context_t *ctx = &hgc->ctx;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
257 debugmsg("response read from channel %c, size %zu",
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
258 ctx->ch, ctx->datasize);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
259 switch (ctx->ch) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
260 case 'o':
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
261 fwrite(ctx->data, sizeof(ctx->data[0]), ctx->datasize,
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
262 stdout);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
263 break;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
264 case 'e':
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
265 fwrite(ctx->data, sizeof(ctx->data[0]), ctx->datasize,
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
266 stderr);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
267 break;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
268 case 'd':
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
269 /* assumes last char is '\n' */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
270 ctx->data[ctx->datasize - 1] = '\0';
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
271 debugmsg("server: %s", ctx->data);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
272 break;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
273 case 'r':
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
274 return;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
275 case 'I':
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
276 handlereadrequest(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
277 break;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
278 case 'L':
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
279 handlereadlinerequest(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
280 break;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
281 case 'S':
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
282 handlesystemrequest(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
283 break;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
284 default:
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
285 if (isupper(ctx->ch))
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
286 abortmsg("cannot handle response (ch = %c)",
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
287 ctx->ch);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
288 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
289 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
290 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
291
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
292 static unsigned int parsecapabilities(const char *s, const char *e)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
293 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
294 unsigned int flags = 0;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
295 while (s < e) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
296 const char *t = strchr(s, ' ');
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
297 if (!t || t > e)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
298 t = e;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
299 const cappair_t *cap;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
300 for (cap = captable; cap->flag; ++cap) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
301 size_t n = t - s;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
302 if (strncmp(s, cap->name, n) == 0 &&
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
303 strlen(cap->name) == n) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
304 flags |= cap->flag;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
305 break;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
306 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
307 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
308 s = t + 1;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
309 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
310 return flags;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
311 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
312
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
313 static void readhello(hgclient_t *hgc)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
314 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
315 readchannel(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
316 context_t *ctx = &hgc->ctx;
28512
b957b4c6cad8 chg: provide early exception to user
Yuya Nishihara <yuya@tcha.org>
parents: 28356
diff changeset
317 if (ctx->ch != 'o') {
b957b4c6cad8 chg: provide early exception to user
Yuya Nishihara <yuya@tcha.org>
parents: 28356
diff changeset
318 char ch = ctx->ch;
b957b4c6cad8 chg: provide early exception to user
Yuya Nishihara <yuya@tcha.org>
parents: 28356
diff changeset
319 if (ch == 'e') {
b957b4c6cad8 chg: provide early exception to user
Yuya Nishihara <yuya@tcha.org>
parents: 28356
diff changeset
320 /* write early error and will exit */
b957b4c6cad8 chg: provide early exception to user
Yuya Nishihara <yuya@tcha.org>
parents: 28356
diff changeset
321 fwrite(ctx->data, sizeof(ctx->data[0]), ctx->datasize,
b957b4c6cad8 chg: provide early exception to user
Yuya Nishihara <yuya@tcha.org>
parents: 28356
diff changeset
322 stderr);
b957b4c6cad8 chg: provide early exception to user
Yuya Nishihara <yuya@tcha.org>
parents: 28356
diff changeset
323 handleresponse(hgc);
b957b4c6cad8 chg: provide early exception to user
Yuya Nishihara <yuya@tcha.org>
parents: 28356
diff changeset
324 }
b957b4c6cad8 chg: provide early exception to user
Yuya Nishihara <yuya@tcha.org>
parents: 28356
diff changeset
325 abortmsg("unexpected channel of hello message (ch = %c)", ch);
b957b4c6cad8 chg: provide early exception to user
Yuya Nishihara <yuya@tcha.org>
parents: 28356
diff changeset
326 }
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
327 enlargecontext(ctx, ctx->datasize + 1);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
328 ctx->data[ctx->datasize] = '\0';
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
329 debugmsg("hello received: %s (size = %zu)", ctx->data, ctx->datasize);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
330
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
331 const char *s = ctx->data;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
332 const char *const dataend = ctx->data + ctx->datasize;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
333 while (s < dataend) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
334 const char *t = strchr(s, ':');
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
335 if (!t || t[1] != ' ')
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
336 break;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
337 const char *u = strchr(t + 2, '\n');
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
338 if (!u)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
339 u = dataend;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
340 if (strncmp(s, "capabilities:", t - s + 1) == 0) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
341 hgc->capflags = parsecapabilities(t + 2, u);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
342 } else if (strncmp(s, "pid:", t - s + 1) == 0) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
343 hgc->pid = strtol(t + 2, NULL, 10);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
344 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
345 s = u + 1;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
346 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
347 debugmsg("capflags=0x%04x, pid=%d", hgc->capflags, hgc->pid);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
348 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
349
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
350 static void attachio(hgclient_t *hgc)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
351 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
352 debugmsg("request attachio");
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
353 static const char chcmd[] = "attachio\n";
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
354 sendall(hgc->sockfd, chcmd, sizeof(chcmd) - 1);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
355 readchannel(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
356 context_t *ctx = &hgc->ctx;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
357 if (ctx->ch != 'I')
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
358 abortmsg("unexpected response for attachio (ch = %c)", ctx->ch);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
359
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
360 static const int fds[3] = {STDIN_FILENO, STDOUT_FILENO, STDERR_FILENO};
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
361 struct msghdr msgh;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
362 memset(&msgh, 0, sizeof(msgh));
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
363 struct iovec iov = {ctx->data, ctx->datasize}; /* dummy payload */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
364 msgh.msg_iov = &iov;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
365 msgh.msg_iovlen = 1;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
366 char fdbuf[CMSG_SPACE(sizeof(fds))];
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
367 msgh.msg_control = fdbuf;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
368 msgh.msg_controllen = sizeof(fdbuf);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
369 struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msgh);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
370 cmsg->cmsg_level = SOL_SOCKET;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
371 cmsg->cmsg_type = SCM_RIGHTS;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
372 cmsg->cmsg_len = CMSG_LEN(sizeof(fds));
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
373 memcpy(CMSG_DATA(cmsg), fds, sizeof(fds));
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
374 msgh.msg_controllen = cmsg->cmsg_len;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
375 ssize_t r = sendmsg(hgc->sockfd, &msgh, 0);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
376 if (r < 0)
28789
7f6e0a15189b chg: replace abortmsg showing errno with abortmsgerrno
Jun Wu <quark@fb.com>
parents: 28769
diff changeset
377 abortmsgerrno("sendmsg failed");
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
378
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
379 handleresponse(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
380 int32_t n;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
381 if (ctx->datasize != sizeof(n))
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
382 abortmsg("unexpected size of attachio result");
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
383 memcpy(&n, ctx->data, sizeof(n));
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
384 n = ntohl(n);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
385 if (n != sizeof(fds) / sizeof(fds[0]))
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
386 abortmsg("failed to send fds (n = %d)", n);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
387 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
388
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
389 static void chdirtocwd(hgclient_t *hgc)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
390 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
391 if (!getcwd(hgc->ctx.data, hgc->ctx.maxdatasize))
28789
7f6e0a15189b chg: replace abortmsg showing errno with abortmsgerrno
Jun Wu <quark@fb.com>
parents: 28769
diff changeset
392 abortmsgerrno("failed to getcwd");
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
393 hgc->ctx.datasize = strlen(hgc->ctx.data);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
394 writeblockrequest(hgc, "chdir");
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
395 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
396
28160
098cb7bd46a7 chg: forward umask from client to server
Jun Wu <quark@fb.com>
parents: 28060
diff changeset
397 static void forwardumask(hgclient_t *hgc)
098cb7bd46a7 chg: forward umask from client to server
Jun Wu <quark@fb.com>
parents: 28060
diff changeset
398 {
098cb7bd46a7 chg: forward umask from client to server
Jun Wu <quark@fb.com>
parents: 28060
diff changeset
399 mode_t mask = umask(0);
098cb7bd46a7 chg: forward umask from client to server
Jun Wu <quark@fb.com>
parents: 28060
diff changeset
400 umask(mask);
098cb7bd46a7 chg: forward umask from client to server
Jun Wu <quark@fb.com>
parents: 28060
diff changeset
401
098cb7bd46a7 chg: forward umask from client to server
Jun Wu <quark@fb.com>
parents: 28060
diff changeset
402 static const char command[] = "setumask\n";
098cb7bd46a7 chg: forward umask from client to server
Jun Wu <quark@fb.com>
parents: 28060
diff changeset
403 sendall(hgc->sockfd, command, sizeof(command) - 1);
098cb7bd46a7 chg: forward umask from client to server
Jun Wu <quark@fb.com>
parents: 28060
diff changeset
404 uint32_t data = htonl(mask);
098cb7bd46a7 chg: forward umask from client to server
Jun Wu <quark@fb.com>
parents: 28060
diff changeset
405 sendall(hgc->sockfd, &data, sizeof(data));
098cb7bd46a7 chg: forward umask from client to server
Jun Wu <quark@fb.com>
parents: 28060
diff changeset
406 }
098cb7bd46a7 chg: forward umask from client to server
Jun Wu <quark@fb.com>
parents: 28060
diff changeset
407
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
408 /*!
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
409 * Open connection to per-user cmdserver
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
410 *
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
411 * If no background server running, returns NULL.
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
412 */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
413 hgclient_t *hgc_open(const char *sockname)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
414 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
415 int fd = socket(AF_UNIX, SOCK_STREAM, 0);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
416 if (fd < 0)
28789
7f6e0a15189b chg: replace abortmsg showing errno with abortmsgerrno
Jun Wu <quark@fb.com>
parents: 28769
diff changeset
417 abortmsgerrno("cannot create socket");
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
418
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
419 /* don't keep fd on fork(), so that it can be closed when the parent
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
420 * process get terminated. */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
421 int flags = fcntl(fd, F_GETFD);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
422 if (flags < 0)
28789
7f6e0a15189b chg: replace abortmsg showing errno with abortmsgerrno
Jun Wu <quark@fb.com>
parents: 28769
diff changeset
423 abortmsgerrno("cannot get flags of socket");
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
424 if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0)
28789
7f6e0a15189b chg: replace abortmsg showing errno with abortmsgerrno
Jun Wu <quark@fb.com>
parents: 28769
diff changeset
425 abortmsgerrno("cannot set flags of socket");
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
426
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
427 struct sockaddr_un addr;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
428 addr.sun_family = AF_UNIX;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
429 strncpy(addr.sun_path, sockname, sizeof(addr.sun_path));
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
430 addr.sun_path[sizeof(addr.sun_path) - 1] = '\0';
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
431
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
432 int r = connect(fd, (struct sockaddr *)&addr, sizeof(addr));
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
433 if (r < 0) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
434 close(fd);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
435 if (errno == ENOENT || errno == ECONNREFUSED)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
436 return NULL;
28789
7f6e0a15189b chg: replace abortmsg showing errno with abortmsgerrno
Jun Wu <quark@fb.com>
parents: 28769
diff changeset
437 abortmsgerrno("cannot connect to %s", addr.sun_path);
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
438 }
28769
222f482930c8 chg: make connect debug message less repetitive
Jun Wu <quark@fb.com>
parents: 28551
diff changeset
439 debugmsg("connected to %s", addr.sun_path);
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
440
28166
c6e0c2533e5f chg: use mallocx and reallocx in hgclient
Jun Wu <quark@fb.com>
parents: 28160
diff changeset
441 hgclient_t *hgc = mallocx(sizeof(hgclient_t));
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
442 memset(hgc, 0, sizeof(*hgc));
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
443 hgc->sockfd = fd;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
444 initcontext(&hgc->ctx);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
445
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
446 readhello(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
447 if (!(hgc->capflags & CAP_RUNCOMMAND))
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
448 abortmsg("insufficient capability: runcommand");
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
449 if (hgc->capflags & CAP_ATTACHIO)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
450 attachio(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
451 if (hgc->capflags & CAP_CHDIR)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
452 chdirtocwd(hgc);
28160
098cb7bd46a7 chg: forward umask from client to server
Jun Wu <quark@fb.com>
parents: 28060
diff changeset
453 if (hgc->capflags & CAP_SETUMASK)
098cb7bd46a7 chg: forward umask from client to server
Jun Wu <quark@fb.com>
parents: 28060
diff changeset
454 forwardumask(hgc);
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
455
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
456 return hgc;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
457 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
458
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
459 /*!
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
460 * Close connection and free allocated memory
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
461 */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
462 void hgc_close(hgclient_t *hgc)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
463 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
464 assert(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
465 freecontext(&hgc->ctx);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
466 close(hgc->sockfd);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
467 free(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
468 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
469
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
470 pid_t hgc_peerpid(const hgclient_t *hgc)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
471 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
472 assert(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
473 return hgc->pid;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
474 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
475
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
476 /*!
28356
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
477 * Send command line arguments to let the server load the repo config and check
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
478 * whether it can process our request directly or not.
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
479 * Make sure hgc_setenv is called before calling this.
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
480 *
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
481 * @return - NULL, the server believes it can handle our request, or does not
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
482 * support "validate" command.
28535
aa082a8125da chgserver: add an explicit "reconnect" instruction to validate
Jun Wu <quark@fb.com>
parents: 28512
diff changeset
483 * - a list of strings, the server probably cannot handle our request
aa082a8125da chgserver: add an explicit "reconnect" instruction to validate
Jun Wu <quark@fb.com>
parents: 28512
diff changeset
484 * and it sent instructions telling us what to do next. See
28356
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
485 * chgserver.py for possible instruction formats.
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
486 * the list should be freed by the caller.
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
487 * the last string is guaranteed to be NULL.
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
488 */
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
489 const char **hgc_validate(hgclient_t *hgc, const char *const args[],
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
490 size_t argsize)
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
491 {
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
492 assert(hgc);
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
493 if (!(hgc->capflags & CAP_VALIDATE))
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
494 return NULL;
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
495
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
496 packcmdargs(&hgc->ctx, args, argsize);
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
497 writeblockrequest(hgc, "validate");
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
498 handleresponse(hgc);
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
499
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
500 /* the server returns '\0' if it can handle our request */
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
501 if (hgc->ctx.datasize <= 1)
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
502 return NULL;
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
503
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
504 /* make sure the buffer is '\0' terminated */
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
505 enlargecontext(&hgc->ctx, hgc->ctx.datasize + 1);
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
506 hgc->ctx.data[hgc->ctx.datasize] = '\0';
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
507 return unpackcmdargsnul(&hgc->ctx);
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
508 }
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
509
a5c773acb018 chg: implement validate in hgclient
Jun Wu <quark@fb.com>
parents: 28166
diff changeset
510 /*!
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
511 * Execute the specified Mercurial command
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
512 *
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
513 * @return result code
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
514 */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
515 int hgc_runcommand(hgclient_t *hgc, const char *const args[], size_t argsize)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
516 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
517 assert(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
518
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
519 packcmdargs(&hgc->ctx, args, argsize);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
520 writeblockrequest(hgc, "runcommand");
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
521 handleresponse(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
522
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
523 int32_t exitcode_n;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
524 if (hgc->ctx.datasize != sizeof(exitcode_n)) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
525 abortmsg("unexpected size of exitcode");
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
526 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
527 memcpy(&exitcode_n, hgc->ctx.data, sizeof(exitcode_n));
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
528 return ntohl(exitcode_n);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
529 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
530
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
531 /*!
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
532 * (Re-)send client's stdio channels so that the server can access to tty
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
533 */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
534 void hgc_attachio(hgclient_t *hgc)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
535 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
536 assert(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
537 if (!(hgc->capflags & CAP_ATTACHIO))
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
538 return;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
539 attachio(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
540 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
541
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
542 /*!
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
543 * Get pager command for the given Mercurial command args
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
544 *
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
545 * If no pager enabled, returns NULL. The return value becomes invalid
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
546 * once you run another request to hgc.
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
547 */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
548 const char *hgc_getpager(hgclient_t *hgc, const char *const args[],
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
549 size_t argsize)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
550 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
551 assert(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
552
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
553 if (!(hgc->capflags & CAP_GETPAGER))
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
554 return NULL;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
555
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
556 packcmdargs(&hgc->ctx, args, argsize);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
557 writeblockrequest(hgc, "getpager");
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
558 handleresponse(hgc);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
559
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
560 if (hgc->ctx.datasize < 1 || hgc->ctx.data[0] == '\0')
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
561 return NULL;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
562 enlargecontext(&hgc->ctx, hgc->ctx.datasize + 1);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
563 hgc->ctx.data[hgc->ctx.datasize] = '\0';
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
564 return hgc->ctx.data;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
565 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
566
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
567 /*!
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
568 * Update server's environment variables
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
569 *
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
570 * @param envp list of environment variables in "NAME=VALUE" format,
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
571 * terminated by NULL.
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
572 */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
573 void hgc_setenv(hgclient_t *hgc, const char *const envp[])
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
574 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
575 assert(hgc && envp);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
576 if (!(hgc->capflags & CAP_SETENV))
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
577 return;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
578 packcmdargs(&hgc->ctx, envp, /*argsize*/ -1);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
579 writeblockrequest(hgc, "setenv");
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
580 }