annotate contrib/chg/chg.c @ 28060:726f8d6cc324

chg: import frontend sources These files are copied from https://bitbucket.org/yuja/chg/ -r f897faa79687
author Yuya Nishihara <yuya@tcha.org>
date Sun, 03 Jan 2016 12:39:27 +0900
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children 3fc45956c978
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28060
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1 /*
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2 * A fast client for Mercurial command server
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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 <assert.h>
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11 #include <errno.h>
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12 #include <fcntl.h>
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13 #include <signal.h>
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14 #include <stdio.h>
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15 #include <stdlib.h>
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16 #include <string.h>
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17 #include <sys/stat.h>
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18 #include <sys/types.h>
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19 #include <sys/un.h>
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20 #include <sys/wait.h>
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21 #include <time.h>
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22 #include <unistd.h>
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23
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24 #include "hgclient.h"
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25 #include "util.h"
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26
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27 #ifndef UNIX_PATH_MAX
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28 #define UNIX_PATH_MAX (sizeof(((struct sockaddr_un *)NULL)->sun_path))
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29 #endif
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30
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31 struct cmdserveropts {
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32 char sockname[UNIX_PATH_MAX];
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33 char lockfile[UNIX_PATH_MAX];
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34 char pidfile[UNIX_PATH_MAX];
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35 };
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36
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37 static void preparesockdir(const char *sockdir)
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38 {
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39 int r;
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40 r = mkdir(sockdir, 0700);
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41 if (r < 0 && errno != EEXIST)
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42 abortmsg("cannot create sockdir %s (errno = %d)",
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43 sockdir, errno);
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44
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45 struct stat st;
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46 r = lstat(sockdir, &st);
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47 if (r < 0)
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48 abortmsg("cannot stat %s (errno = %d)", sockdir, errno);
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49 if (!S_ISDIR(st.st_mode))
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50 abortmsg("cannot create sockdir %s (file exists)", sockdir);
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51 if (st.st_uid != geteuid() || st.st_mode & 0077)
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52 abortmsg("insecure sockdir %s", sockdir);
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53 }
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54
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55 static void setcmdserveropts(struct cmdserveropts *opts)
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56 {
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57 int r;
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58 char sockdir[UNIX_PATH_MAX];
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59 const char *envsockname = getenv("CHGSOCKNAME");
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60 if (!envsockname) {
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61 /* by default, put socket file in secure directory
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62 * (permission of socket file may be ignored on some Unices) */
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63 const char *tmpdir = getenv("TMPDIR");
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64 if (!tmpdir)
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65 tmpdir = "/tmp";
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66 r = snprintf(sockdir, sizeof(sockdir), "%s/chg%d",
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67 tmpdir, geteuid());
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68 if (r < 0 || (size_t)r >= sizeof(sockdir))
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69 abortmsg("too long TMPDIR (r = %d)", r);
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70 preparesockdir(sockdir);
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71 }
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72
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73 const char *basename = (envsockname) ? envsockname : sockdir;
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74 const char *sockfmt = (envsockname) ? "%s" : "%s/server";
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75 const char *lockfmt = (envsockname) ? "%s.lock" : "%s/lock";
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76 const char *pidfmt = (envsockname) ? "%s.pid" : "%s/pid";
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77 r = snprintf(opts->sockname, sizeof(opts->sockname), sockfmt, basename);
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78 if (r < 0 || (size_t)r >= sizeof(opts->sockname))
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79 abortmsg("too long TMPDIR or CHGSOCKNAME (r = %d)", r);
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80 r = snprintf(opts->lockfile, sizeof(opts->lockfile), lockfmt, basename);
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81 if (r < 0 || (size_t)r >= sizeof(opts->lockfile))
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82 abortmsg("too long TMPDIR or CHGSOCKNAME (r = %d)", r);
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83 r = snprintf(opts->pidfile, sizeof(opts->pidfile), pidfmt, basename);
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84 if (r < 0 || (size_t)r >= sizeof(opts->pidfile))
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85 abortmsg("too long TMPDIR or CHGSOCKNAME (r = %d)", r);
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86 }
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87
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88 /*
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89 * Make lock file that indicates cmdserver process is about to start. Created
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90 * lock file will be deleted by server. (0: success, -1: lock exists)
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91 */
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92 static int lockcmdserver(const struct cmdserveropts *opts)
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93 {
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94 int r;
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95 char info[32];
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96 r = snprintf(info, sizeof(info), "%d", getpid());
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97 if (r < 0 || (size_t)r >= sizeof(info))
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98 abortmsg("failed to format lock info");
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99 r = symlink(info, opts->lockfile);
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100 if (r < 0 && errno != EEXIST)
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101 abortmsg("failed to make lock %s (errno = %d)",
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102 opts->lockfile, errno);
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103 return r;
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104 }
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105
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106 static void execcmdserver(const struct cmdserveropts *opts)
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107 {
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108 const char *hgcmd = getenv("CHGHG");
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109 if (!hgcmd || hgcmd[0] == '\0')
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110 hgcmd = getenv("HG");
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111 if (!hgcmd || hgcmd[0] == '\0')
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112 hgcmd = "hg";
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113
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114 const char *argv[] = {
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115 hgcmd,
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116 "serve",
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117 "--cwd", "/",
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118 "--cmdserver", "chgunix",
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119 "--address", opts->sockname,
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120 "--daemon-pipefds", opts->lockfile,
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121 "--pid-file", opts->pidfile,
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122 "--config", "extensions.chgserver=",
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123 /* wrap root ui so that it can be disabled/enabled by config */
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124 "--config", "progress.assume-tty=1",
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125 NULL,
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126 };
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127 if (execvp(hgcmd, (char **)argv) < 0)
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128 abortmsg("failed to exec cmdserver (errno = %d)", errno);
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129 }
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130
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131 /*
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132 * Sleep until lock file is deleted, i.e. cmdserver process starts listening.
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133 * If pid is given, it also checks if the child process fails to start.
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134 */
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135 static void waitcmdserver(const struct cmdserveropts *opts, pid_t pid)
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136 {
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137 static const struct timespec sleepreq = {0, 10 * 1000000};
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138 int pst = 0;
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139
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140 for (unsigned int i = 0; i < 10 * 100; i++) {
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141 int r;
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142 struct stat lst;
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143
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144 r = lstat(opts->lockfile, &lst);
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145 if (r < 0 && errno == ENOENT)
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146 return; /* lock file deleted by server */
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147 if (r < 0)
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148 goto cleanup;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
149
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
150 if (pid > 0) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
151 /* collect zombie if child process fails to start */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
152 r = waitpid(pid, &pst, WNOHANG);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
153 if (r != 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
154 goto cleanup;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
155 }
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 nanosleep(&sleepreq, NULL);
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 abortmsg("timed out waiting for cmdserver %s", opts->lockfile);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
161 return;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
162
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
163 cleanup:
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
164 if (pid > 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
165 /* lockfile should be made by this process */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
166 unlink(opts->lockfile);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
167 if (WIFEXITED(pst)) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
168 abortmsg("cmdserver exited with status %d", WEXITSTATUS(pst));
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
169 } else if (WIFSIGNALED(pst)) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
170 abortmsg("cmdserver killed by signal %d", WTERMSIG(pst));
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
171 } else {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
172 abortmsg("error white waiting cmdserver");
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
173 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
174 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
175
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
176 /* Spawn new background cmdserver */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
177 static void startcmdserver(const struct cmdserveropts *opts)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
178 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
179 debugmsg("start cmdserver at %s", opts->sockname);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
180
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
181 if (lockcmdserver(opts) < 0) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
182 debugmsg("lock file exists, waiting...");
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
183 waitcmdserver(opts, 0);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
184 return;
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
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
187 /* remove dead cmdserver socket if any */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
188 unlink(opts->sockname);
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 pid_t pid = fork();
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
191 if (pid < 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
192 abortmsg("failed to fork cmdserver process");
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
193 if (pid == 0) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
194 /* bypass uisetup() of pager extension */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
195 int nullfd = open("/dev/null", O_WRONLY);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
196 if (nullfd >= 0) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
197 dup2(nullfd, fileno(stdout));
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
198 close(nullfd);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
199 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
200 execcmdserver(opts);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
201 } else {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
202 waitcmdserver(opts, pid);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
203 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
204 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
205
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
206 static void killcmdserver(const struct cmdserveropts *opts, int sig)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
207 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
208 FILE *fp = fopen(opts->pidfile, "r");
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
209 if (!fp)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
210 abortmsg("cannot open %s (errno = %d)", opts->pidfile, errno);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
211 int pid = 0;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
212 int n = fscanf(fp, "%d", &pid);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
213 fclose(fp);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
214 if (n != 1 || pid <= 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
215 abortmsg("cannot read pid from %s", opts->pidfile);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
216
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
217 if (kill((pid_t)pid, sig) < 0) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
218 if (errno == ESRCH)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
219 return;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
220 abortmsg("cannot kill %d (errno = %d)", pid, errno);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
221 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
222 }
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 static pid_t peerpid = 0;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
225
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
226 static void forwardsignal(int sig)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
227 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
228 assert(peerpid > 0);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
229 if (kill(peerpid, sig) < 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
230 abortmsg("cannot kill %d (errno = %d)", peerpid, errno);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
231 debugmsg("forward signal %d", sig);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
232 }
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 static void setupsignalhandler(pid_t pid)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
235 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
236 if (pid <= 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
237 return;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
238 peerpid = pid;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
239
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
240 struct sigaction sa;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
241 memset(&sa, 0, sizeof(sa));
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
242 sa.sa_handler = forwardsignal;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
243 sa.sa_flags = SA_RESTART;
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 sigaction(SIGHUP, &sa, NULL);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
246 sigaction(SIGINT, &sa, NULL);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
247
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
248 /* terminate frontend by double SIGTERM in case of server freeze */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
249 sa.sa_flags |= SA_RESETHAND;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
250 sigaction(SIGTERM, &sa, NULL);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
251 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
252
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
253 /* This implementation is based on hgext/pager.py (pre 369741ef7253) */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
254 static void setuppager(hgclient_t *hgc, const char *const args[],
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
255 size_t argsize)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
256 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
257 const char *pagercmd = hgc_getpager(hgc, args, argsize);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
258 if (!pagercmd)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
259 return;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
260
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
261 int pipefds[2];
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
262 if (pipe(pipefds) < 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
263 return;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
264 pid_t pid = fork();
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
265 if (pid < 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
266 goto error;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
267 if (pid == 0) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
268 close(pipefds[0]);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
269 if (dup2(pipefds[1], fileno(stdout)) < 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
270 goto error;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
271 if (isatty(fileno(stderr))) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
272 if (dup2(pipefds[1], fileno(stderr)) < 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
273 goto error;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
274 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
275 close(pipefds[1]);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
276 hgc_attachio(hgc); /* reattach to pager */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
277 return;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
278 } else {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
279 dup2(pipefds[0], fileno(stdin));
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
280 close(pipefds[0]);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
281 close(pipefds[1]);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
282
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
283 int r = execlp("/bin/sh", "/bin/sh", "-c", pagercmd, NULL);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
284 if (r < 0) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
285 abortmsg("cannot start pager '%s' (errno = %d)",
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
286 pagercmd, errno);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
287 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
288 return;
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 error:
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
292 close(pipefds[0]);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
293 close(pipefds[1]);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
294 abortmsg("failed to prepare pager (errno = %d)", errno);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
295 }
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
296
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
297 int main(int argc, const char *argv[], const char *envp[])
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
298 {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
299 if (getenv("CHGDEBUG"))
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
300 enabledebugmsg();
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
301
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
302 struct cmdserveropts opts;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
303 setcmdserveropts(&opts);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
304
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
305 if (argc == 2) {
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306 int sig = 0;
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307 if (strcmp(argv[1], "--kill-chg-daemon") == 0)
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308 sig = SIGTERM;
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309 if (strcmp(argv[1], "--reload-chg-daemon") == 0)
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310 sig = SIGHUP;
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311 if (sig > 0) {
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312 killcmdserver(&opts, sig);
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313 return 0;
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314 }
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315 }
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316
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317 hgclient_t *hgc = hgc_open(opts.sockname);
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318 if (!hgc) {
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319 startcmdserver(&opts);
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320 hgc = hgc_open(opts.sockname);
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321 }
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322 if (!hgc)
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323 abortmsg("cannot open hg client");
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324
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325 setupsignalhandler(hgc_peerpid(hgc));
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326 hgc_setenv(hgc, envp);
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327 setuppager(hgc, argv + 1, argc - 1);
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328 int exitcode = hgc_runcommand(hgc, argv + 1, argc - 1);
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329 hgc_close(hgc);
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330 return exitcode;
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331 }