Mercurial > hg
annotate contrib/chg/hgclient.c @ 32481:a87dabb053d0
localrepo: document that __contains__() may raise LookupError
author | Yuya Nishihara <yuya@tcha.org> |
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date | Thu, 25 May 2017 23:18:02 +0900 |
parents | ac5527021097 |
children | 9724f54923ec |
rev | line source |
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28060 | 1 /* |
2 * A command server client that uses Unix domain socket | |
3 * | |
4 * Copyright (c) 2011 Yuya Nishihara <yuya@tcha.org> | |
5 * | |
6 * This software may be used and distributed according to the terms of the | |
7 * GNU General Public License version 2 or any later version. | |
8 */ | |
9 | |
10 #include <arpa/inet.h> /* for ntohl(), htonl() */ | |
11 #include <assert.h> | |
12 #include <ctype.h> | |
13 #include <errno.h> | |
14 #include <fcntl.h> | |
15 #include <signal.h> | |
16 #include <stdint.h> | |
17 #include <stdio.h> | |
18 #include <stdlib.h> | |
19 #include <string.h> | |
20 #include <sys/socket.h> | |
21 #include <sys/stat.h> | |
22 #include <sys/un.h> | |
23 #include <unistd.h> | |
24 | |
25 #include "hgclient.h" | |
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26 #include "procutil.h" |
28060 | 27 #include "util.h" |
28 | |
29 enum { | |
30 CAP_GETENCODING = 0x0001, | |
31 CAP_RUNCOMMAND = 0x0002, | |
32 /* cHg extension: */ | |
33 CAP_ATTACHIO = 0x0100, | |
34 CAP_CHDIR = 0x0200, | |
35 CAP_SETENV = 0x0800, | |
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36 CAP_SETUMASK = 0x1000, |
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37 CAP_VALIDATE = 0x2000, |
30751 | 38 CAP_SETPROCNAME = 0x4000, |
28060 | 39 }; |
40 | |
41 typedef struct { | |
42 const char *name; | |
43 unsigned int flag; | |
44 } cappair_t; | |
45 | |
46 static const cappair_t captable[] = { | |
47 {"getencoding", CAP_GETENCODING}, | |
48 {"runcommand", CAP_RUNCOMMAND}, | |
49 {"attachio", CAP_ATTACHIO}, | |
50 {"chdir", CAP_CHDIR}, | |
51 {"setenv", CAP_SETENV}, | |
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52 {"setumask", CAP_SETUMASK}, |
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53 {"validate", CAP_VALIDATE}, |
30751 | 54 {"setprocname", CAP_SETPROCNAME}, |
28060 | 55 {NULL, 0}, /* terminator */ |
56 }; | |
57 | |
58 typedef struct { | |
59 char ch; | |
60 char *data; | |
61 size_t maxdatasize; | |
62 size_t datasize; | |
63 } context_t; | |
64 | |
65 struct hgclient_tag_ { | |
66 int sockfd; | |
29581 | 67 pid_t pgid; |
28060 | 68 pid_t pid; |
69 context_t ctx; | |
70 unsigned int capflags; | |
71 }; | |
72 | |
73 static const size_t defaultdatasize = 4096; | |
74 | |
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75 static void attachio(hgclient_t *hgc); |
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76 |
28060 | 77 static void initcontext(context_t *ctx) |
78 { | |
79 ctx->ch = '\0'; | |
80 ctx->data = malloc(defaultdatasize); | |
81 ctx->maxdatasize = (ctx->data) ? defaultdatasize : 0; | |
82 ctx->datasize = 0; | |
83 debugmsg("initialize context buffer with size %zu", ctx->maxdatasize); | |
84 } | |
85 | |
86 static void enlargecontext(context_t *ctx, size_t newsize) | |
87 { | |
88 if (newsize <= ctx->maxdatasize) | |
89 return; | |
90 | |
91 newsize = defaultdatasize | |
92 * ((newsize + defaultdatasize - 1) / defaultdatasize); | |
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93 ctx->data = reallocx(ctx->data, newsize); |
28060 | 94 ctx->maxdatasize = newsize; |
95 debugmsg("enlarge context buffer to %zu", ctx->maxdatasize); | |
96 } | |
97 | |
98 static void freecontext(context_t *ctx) | |
99 { | |
100 debugmsg("free context buffer"); | |
101 free(ctx->data); | |
102 ctx->data = NULL; | |
103 ctx->maxdatasize = 0; | |
104 ctx->datasize = 0; | |
105 } | |
106 | |
107 /* Read channeled response from cmdserver */ | |
108 static void readchannel(hgclient_t *hgc) | |
109 { | |
110 assert(hgc); | |
111 | |
112 ssize_t rsize = recv(hgc->sockfd, &hgc->ctx.ch, sizeof(hgc->ctx.ch), 0); | |
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113 if (rsize != sizeof(hgc->ctx.ch)) { |
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114 /* server would have exception and traceback would be printed */ |
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115 debugmsg("failed to read channel"); |
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116 exit(255); |
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117 } |
28060 | 118 |
119 uint32_t datasize_n; | |
120 rsize = recv(hgc->sockfd, &datasize_n, sizeof(datasize_n), 0); | |
121 if (rsize != sizeof(datasize_n)) | |
122 abortmsg("failed to read data size"); | |
123 | |
124 /* datasize denotes the maximum size to write if input request */ | |
125 hgc->ctx.datasize = ntohl(datasize_n); | |
126 enlargecontext(&hgc->ctx, hgc->ctx.datasize); | |
127 | |
128 if (isupper(hgc->ctx.ch) && hgc->ctx.ch != 'S') | |
129 return; /* assumes input request */ | |
130 | |
131 size_t cursize = 0; | |
132 while (cursize < hgc->ctx.datasize) { | |
133 rsize = recv(hgc->sockfd, hgc->ctx.data + cursize, | |
134 hgc->ctx.datasize - cursize, 0); | |
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135 if (rsize < 1) |
28060 | 136 abortmsg("failed to read data block"); |
137 cursize += rsize; | |
138 } | |
139 } | |
140 | |
141 static void sendall(int sockfd, const void *data, size_t datasize) | |
142 { | |
143 const char *p = data; | |
144 const char *const endp = p + datasize; | |
145 while (p < endp) { | |
146 ssize_t r = send(sockfd, p, endp - p, 0); | |
147 if (r < 0) | |
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148 abortmsgerrno("cannot communicate"); |
28060 | 149 p += r; |
150 } | |
151 } | |
152 | |
153 /* Write lengh-data block to cmdserver */ | |
154 static void writeblock(const hgclient_t *hgc) | |
155 { | |
156 assert(hgc); | |
157 | |
158 const uint32_t datasize_n = htonl(hgc->ctx.datasize); | |
159 sendall(hgc->sockfd, &datasize_n, sizeof(datasize_n)); | |
160 | |
161 sendall(hgc->sockfd, hgc->ctx.data, hgc->ctx.datasize); | |
162 } | |
163 | |
164 static void writeblockrequest(const hgclient_t *hgc, const char *chcmd) | |
165 { | |
166 debugmsg("request %s, block size %zu", chcmd, hgc->ctx.datasize); | |
167 | |
168 char buf[strlen(chcmd) + 1]; | |
169 memcpy(buf, chcmd, sizeof(buf) - 1); | |
170 buf[sizeof(buf) - 1] = '\n'; | |
171 sendall(hgc->sockfd, buf, sizeof(buf)); | |
172 | |
173 writeblock(hgc); | |
174 } | |
175 | |
176 /* Build '\0'-separated list of args. argsize < 0 denotes that args are | |
177 * terminated by NULL. */ | |
178 static void packcmdargs(context_t *ctx, const char *const args[], | |
179 ssize_t argsize) | |
180 { | |
181 ctx->datasize = 0; | |
182 const char *const *const end = (argsize >= 0) ? args + argsize : NULL; | |
183 for (const char *const *it = args; it != end && *it; ++it) { | |
184 const size_t n = strlen(*it) + 1; /* include '\0' */ | |
185 enlargecontext(ctx, ctx->datasize + n); | |
186 memcpy(ctx->data + ctx->datasize, *it, n); | |
187 ctx->datasize += n; | |
188 } | |
189 | |
190 if (ctx->datasize > 0) | |
191 --ctx->datasize; /* strip last '\0' */ | |
192 } | |
193 | |
194 /* Extract '\0'-separated list of args to new buffer, terminated by NULL */ | |
195 static const char **unpackcmdargsnul(const context_t *ctx) | |
196 { | |
197 const char **args = NULL; | |
198 size_t nargs = 0, maxnargs = 0; | |
199 const char *s = ctx->data; | |
200 const char *e = ctx->data + ctx->datasize; | |
201 for (;;) { | |
202 if (nargs + 1 >= maxnargs) { /* including last NULL */ | |
203 maxnargs += 256; | |
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204 args = reallocx(args, maxnargs * sizeof(args[0])); |
28060 | 205 } |
206 args[nargs] = s; | |
207 nargs++; | |
208 s = memchr(s, '\0', e - s); | |
209 if (!s) | |
210 break; | |
211 s++; | |
212 } | |
213 args[nargs] = NULL; | |
214 return args; | |
215 } | |
216 | |
217 static void handlereadrequest(hgclient_t *hgc) | |
218 { | |
219 context_t *ctx = &hgc->ctx; | |
220 size_t r = fread(ctx->data, sizeof(ctx->data[0]), ctx->datasize, stdin); | |
221 ctx->datasize = r; | |
222 writeblock(hgc); | |
223 } | |
224 | |
225 /* Read single-line */ | |
226 static void handlereadlinerequest(hgclient_t *hgc) | |
227 { | |
228 context_t *ctx = &hgc->ctx; | |
229 if (!fgets(ctx->data, ctx->datasize, stdin)) | |
230 ctx->data[0] = '\0'; | |
231 ctx->datasize = strlen(ctx->data); | |
232 writeblock(hgc); | |
233 } | |
234 | |
235 /* Execute the requested command and write exit code */ | |
236 static void handlesystemrequest(hgclient_t *hgc) | |
237 { | |
238 context_t *ctx = &hgc->ctx; | |
239 enlargecontext(ctx, ctx->datasize + 1); | |
240 ctx->data[ctx->datasize] = '\0'; /* terminate last string */ | |
241 | |
242 const char **args = unpackcmdargsnul(ctx); | |
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243 if (!args[0] || !args[1] || !args[2]) |
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244 abortmsg("missing type or command or cwd in system request"); |
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245 if (strcmp(args[0], "system") == 0) { |
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246 debugmsg("run '%s' at '%s'", args[1], args[2]); |
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247 int32_t r = runshellcmd(args[1], args + 3, args[2]); |
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248 free(args); |
28060 | 249 |
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250 uint32_t r_n = htonl(r); |
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251 memcpy(ctx->data, &r_n, sizeof(r_n)); |
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252 ctx->datasize = sizeof(r_n); |
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253 writeblock(hgc); |
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254 } else if (strcmp(args[0], "pager") == 0) { |
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255 setuppager(args[1], args + 3); |
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256 if (hgc->capflags & CAP_ATTACHIO) |
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257 attachio(hgc); |
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258 /* unblock the server */ |
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259 static const char emptycmd[] = "\n"; |
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260 sendall(hgc->sockfd, emptycmd, sizeof(emptycmd) - 1); |
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261 } else { |
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262 abortmsg("unknown type in system request: %s", args[0]); |
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263 } |
28060 | 264 } |
265 | |
266 /* Read response of command execution until receiving 'r'-esult */ | |
267 static void handleresponse(hgclient_t *hgc) | |
268 { | |
269 for (;;) { | |
270 readchannel(hgc); | |
271 context_t *ctx = &hgc->ctx; | |
272 debugmsg("response read from channel %c, size %zu", | |
273 ctx->ch, ctx->datasize); | |
274 switch (ctx->ch) { | |
275 case 'o': | |
276 fwrite(ctx->data, sizeof(ctx->data[0]), ctx->datasize, | |
277 stdout); | |
278 break; | |
279 case 'e': | |
280 fwrite(ctx->data, sizeof(ctx->data[0]), ctx->datasize, | |
281 stderr); | |
282 break; | |
283 case 'd': | |
284 /* assumes last char is '\n' */ | |
285 ctx->data[ctx->datasize - 1] = '\0'; | |
286 debugmsg("server: %s", ctx->data); | |
287 break; | |
288 case 'r': | |
289 return; | |
290 case 'I': | |
291 handlereadrequest(hgc); | |
292 break; | |
293 case 'L': | |
294 handlereadlinerequest(hgc); | |
295 break; | |
296 case 'S': | |
297 handlesystemrequest(hgc); | |
298 break; | |
299 default: | |
300 if (isupper(ctx->ch)) | |
301 abortmsg("cannot handle response (ch = %c)", | |
302 ctx->ch); | |
303 } | |
304 } | |
305 } | |
306 | |
307 static unsigned int parsecapabilities(const char *s, const char *e) | |
308 { | |
309 unsigned int flags = 0; | |
310 while (s < e) { | |
311 const char *t = strchr(s, ' '); | |
312 if (!t || t > e) | |
313 t = e; | |
314 const cappair_t *cap; | |
315 for (cap = captable; cap->flag; ++cap) { | |
316 size_t n = t - s; | |
317 if (strncmp(s, cap->name, n) == 0 && | |
318 strlen(cap->name) == n) { | |
319 flags |= cap->flag; | |
320 break; | |
321 } | |
322 } | |
323 s = t + 1; | |
324 } | |
325 return flags; | |
326 } | |
327 | |
328 static void readhello(hgclient_t *hgc) | |
329 { | |
330 readchannel(hgc); | |
331 context_t *ctx = &hgc->ctx; | |
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332 if (ctx->ch != 'o') { |
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333 char ch = ctx->ch; |
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334 if (ch == 'e') { |
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335 /* write early error and will exit */ |
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336 fwrite(ctx->data, sizeof(ctx->data[0]), ctx->datasize, |
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337 stderr); |
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338 handleresponse(hgc); |
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339 } |
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340 abortmsg("unexpected channel of hello message (ch = %c)", ch); |
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341 } |
28060 | 342 enlargecontext(ctx, ctx->datasize + 1); |
343 ctx->data[ctx->datasize] = '\0'; | |
344 debugmsg("hello received: %s (size = %zu)", ctx->data, ctx->datasize); | |
345 | |
346 const char *s = ctx->data; | |
347 const char *const dataend = ctx->data + ctx->datasize; | |
348 while (s < dataend) { | |
349 const char *t = strchr(s, ':'); | |
350 if (!t || t[1] != ' ') | |
351 break; | |
352 const char *u = strchr(t + 2, '\n'); | |
353 if (!u) | |
354 u = dataend; | |
355 if (strncmp(s, "capabilities:", t - s + 1) == 0) { | |
356 hgc->capflags = parsecapabilities(t + 2, u); | |
29581 | 357 } else if (strncmp(s, "pgid:", t - s + 1) == 0) { |
358 hgc->pgid = strtol(t + 2, NULL, 10); | |
28060 | 359 } else if (strncmp(s, "pid:", t - s + 1) == 0) { |
360 hgc->pid = strtol(t + 2, NULL, 10); | |
361 } | |
362 s = u + 1; | |
363 } | |
364 debugmsg("capflags=0x%04x, pid=%d", hgc->capflags, hgc->pid); | |
365 } | |
366 | |
30751 | 367 static void updateprocname(hgclient_t *hgc) |
368 { | |
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369 int r = snprintf(hgc->ctx.data, hgc->ctx.maxdatasize, |
30751 | 370 "chg[worker/%d]", (int)getpid()); |
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371 if (r < 0 || (size_t)r >= hgc->ctx.maxdatasize) |
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372 abortmsg("insufficient buffer to write procname (r = %d)", r); |
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373 hgc->ctx.datasize = (size_t)r; |
30751 | 374 writeblockrequest(hgc, "setprocname"); |
375 } | |
376 | |
28060 | 377 static void attachio(hgclient_t *hgc) |
378 { | |
379 debugmsg("request attachio"); | |
380 static const char chcmd[] = "attachio\n"; | |
381 sendall(hgc->sockfd, chcmd, sizeof(chcmd) - 1); | |
382 readchannel(hgc); | |
383 context_t *ctx = &hgc->ctx; | |
384 if (ctx->ch != 'I') | |
385 abortmsg("unexpected response for attachio (ch = %c)", ctx->ch); | |
386 | |
387 static const int fds[3] = {STDIN_FILENO, STDOUT_FILENO, STDERR_FILENO}; | |
388 struct msghdr msgh; | |
389 memset(&msgh, 0, sizeof(msgh)); | |
390 struct iovec iov = {ctx->data, ctx->datasize}; /* dummy payload */ | |
391 msgh.msg_iov = &iov; | |
392 msgh.msg_iovlen = 1; | |
393 char fdbuf[CMSG_SPACE(sizeof(fds))]; | |
394 msgh.msg_control = fdbuf; | |
395 msgh.msg_controllen = sizeof(fdbuf); | |
396 struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msgh); | |
397 cmsg->cmsg_level = SOL_SOCKET; | |
398 cmsg->cmsg_type = SCM_RIGHTS; | |
399 cmsg->cmsg_len = CMSG_LEN(sizeof(fds)); | |
400 memcpy(CMSG_DATA(cmsg), fds, sizeof(fds)); | |
401 msgh.msg_controllen = cmsg->cmsg_len; | |
402 ssize_t r = sendmsg(hgc->sockfd, &msgh, 0); | |
403 if (r < 0) | |
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404 abortmsgerrno("sendmsg failed"); |
28060 | 405 |
406 handleresponse(hgc); | |
407 int32_t n; | |
408 if (ctx->datasize != sizeof(n)) | |
409 abortmsg("unexpected size of attachio result"); | |
410 memcpy(&n, ctx->data, sizeof(n)); | |
411 n = ntohl(n); | |
412 if (n != sizeof(fds) / sizeof(fds[0])) | |
413 abortmsg("failed to send fds (n = %d)", n); | |
414 } | |
415 | |
416 static void chdirtocwd(hgclient_t *hgc) | |
417 { | |
418 if (!getcwd(hgc->ctx.data, hgc->ctx.maxdatasize)) | |
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419 abortmsgerrno("failed to getcwd"); |
28060 | 420 hgc->ctx.datasize = strlen(hgc->ctx.data); |
421 writeblockrequest(hgc, "chdir"); | |
422 } | |
423 | |
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424 static void forwardumask(hgclient_t *hgc) |
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425 { |
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426 mode_t mask = umask(0); |
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427 umask(mask); |
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428 |
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429 static const char command[] = "setumask\n"; |
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430 sendall(hgc->sockfd, command, sizeof(command) - 1); |
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431 uint32_t data = htonl(mask); |
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432 sendall(hgc->sockfd, &data, sizeof(data)); |
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433 } |
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434 |
28060 | 435 /*! |
436 * Open connection to per-user cmdserver | |
437 * | |
438 * If no background server running, returns NULL. | |
439 */ | |
440 hgclient_t *hgc_open(const char *sockname) | |
441 { | |
442 int fd = socket(AF_UNIX, SOCK_STREAM, 0); | |
443 if (fd < 0) | |
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444 abortmsgerrno("cannot create socket"); |
28060 | 445 |
446 /* don't keep fd on fork(), so that it can be closed when the parent | |
447 * process get terminated. */ | |
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448 fsetcloexec(fd); |
28060 | 449 |
450 struct sockaddr_un addr; | |
451 addr.sun_family = AF_UNIX; | |
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452 |
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453 /* use chdir to workaround small sizeof(sun_path) */ |
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454 int bakfd = -1; |
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455 const char *basename = sockname; |
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456 { |
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457 const char *split = strrchr(sockname, '/'); |
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458 if (split && split != sockname) { |
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459 if (split[1] == '\0') |
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460 abortmsg("sockname cannot end with a slash"); |
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461 size_t len = split - sockname; |
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462 char sockdir[len + 1]; |
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463 memcpy(sockdir, sockname, len); |
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464 sockdir[len] = '\0'; |
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465 |
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466 bakfd = open(".", O_DIRECTORY); |
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467 if (bakfd == -1) |
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468 abortmsgerrno("cannot open cwd"); |
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469 |
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470 int r = chdir(sockdir); |
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471 if (r != 0) |
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472 abortmsgerrno("cannot chdir %s", sockdir); |
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473 |
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474 basename = split + 1; |
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475 } |
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476 } |
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477 if (strlen(basename) >= sizeof(addr.sun_path)) |
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478 abortmsg("sockname is too long: %s", basename); |
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479 strncpy(addr.sun_path, basename, sizeof(addr.sun_path)); |
28060 | 480 addr.sun_path[sizeof(addr.sun_path) - 1] = '\0'; |
481 | |
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482 /* real connect */ |
28060 | 483 int r = connect(fd, (struct sockaddr *)&addr, sizeof(addr)); |
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484 if (r < 0) { |
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485 if (errno != ENOENT && errno != ECONNREFUSED) |
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486 abortmsgerrno("cannot connect to %s", sockname); |
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487 } |
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488 if (bakfd != -1) { |
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489 fchdirx(bakfd); |
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490 close(bakfd); |
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491 } |
28060 | 492 if (r < 0) { |
493 close(fd); | |
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494 return NULL; |
28060 | 495 } |
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496 debugmsg("connected to %s", addr.sun_path); |
28060 | 497 |
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498 hgclient_t *hgc = mallocx(sizeof(hgclient_t)); |
28060 | 499 memset(hgc, 0, sizeof(*hgc)); |
500 hgc->sockfd = fd; | |
501 initcontext(&hgc->ctx); | |
502 | |
503 readhello(hgc); | |
504 if (!(hgc->capflags & CAP_RUNCOMMAND)) | |
505 abortmsg("insufficient capability: runcommand"); | |
30751 | 506 if (hgc->capflags & CAP_SETPROCNAME) |
507 updateprocname(hgc); | |
28060 | 508 if (hgc->capflags & CAP_ATTACHIO) |
509 attachio(hgc); | |
510 if (hgc->capflags & CAP_CHDIR) | |
511 chdirtocwd(hgc); | |
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512 if (hgc->capflags & CAP_SETUMASK) |
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513 forwardumask(hgc); |
28060 | 514 |
515 return hgc; | |
516 } | |
517 | |
518 /*! | |
519 * Close connection and free allocated memory | |
520 */ | |
521 void hgc_close(hgclient_t *hgc) | |
522 { | |
523 assert(hgc); | |
524 freecontext(&hgc->ctx); | |
525 close(hgc->sockfd); | |
526 free(hgc); | |
527 } | |
528 | |
29581 | 529 pid_t hgc_peerpgid(const hgclient_t *hgc) |
530 { | |
531 assert(hgc); | |
532 return hgc->pgid; | |
533 } | |
534 | |
28060 | 535 pid_t hgc_peerpid(const hgclient_t *hgc) |
536 { | |
537 assert(hgc); | |
538 return hgc->pid; | |
539 } | |
540 | |
541 /*! | |
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542 * Send command line arguments to let the server load the repo config and check |
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543 * whether it can process our request directly or not. |
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544 * Make sure hgc_setenv is called before calling this. |
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545 * |
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546 * @return - NULL, the server believes it can handle our request, or does not |
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547 * support "validate" command. |
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548 * - a list of strings, the server probably cannot handle our request |
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549 * and it sent instructions telling us what to do next. See |
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550 * chgserver.py for possible instruction formats. |
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551 * the list should be freed by the caller. |
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552 * the last string is guaranteed to be NULL. |
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553 */ |
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554 const char **hgc_validate(hgclient_t *hgc, const char *const args[], |
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555 size_t argsize) |
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556 { |
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557 assert(hgc); |
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558 if (!(hgc->capflags & CAP_VALIDATE)) |
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559 return NULL; |
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560 |
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561 packcmdargs(&hgc->ctx, args, argsize); |
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562 writeblockrequest(hgc, "validate"); |
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563 handleresponse(hgc); |
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564 |
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565 /* the server returns '\0' if it can handle our request */ |
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566 if (hgc->ctx.datasize <= 1) |
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567 return NULL; |
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568 |
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569 /* make sure the buffer is '\0' terminated */ |
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570 enlargecontext(&hgc->ctx, hgc->ctx.datasize + 1); |
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571 hgc->ctx.data[hgc->ctx.datasize] = '\0'; |
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572 return unpackcmdargsnul(&hgc->ctx); |
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573 } |
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574 |
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575 /*! |
28060 | 576 * Execute the specified Mercurial command |
577 * | |
578 * @return result code | |
579 */ | |
580 int hgc_runcommand(hgclient_t *hgc, const char *const args[], size_t argsize) | |
581 { | |
582 assert(hgc); | |
583 | |
584 packcmdargs(&hgc->ctx, args, argsize); | |
585 writeblockrequest(hgc, "runcommand"); | |
586 handleresponse(hgc); | |
587 | |
588 int32_t exitcode_n; | |
589 if (hgc->ctx.datasize != sizeof(exitcode_n)) { | |
590 abortmsg("unexpected size of exitcode"); | |
591 } | |
592 memcpy(&exitcode_n, hgc->ctx.data, sizeof(exitcode_n)); | |
593 return ntohl(exitcode_n); | |
594 } | |
595 | |
596 /*! | |
597 * (Re-)send client's stdio channels so that the server can access to tty | |
598 */ | |
599 void hgc_attachio(hgclient_t *hgc) | |
600 { | |
601 assert(hgc); | |
602 if (!(hgc->capflags & CAP_ATTACHIO)) | |
603 return; | |
604 attachio(hgc); | |
605 } | |
606 | |
607 /*! | |
608 * Update server's environment variables | |
609 * | |
610 * @param envp list of environment variables in "NAME=VALUE" format, | |
611 * terminated by NULL. | |
612 */ | |
613 void hgc_setenv(hgclient_t *hgc, const char *const envp[]) | |
614 { | |
615 assert(hgc && envp); | |
616 if (!(hgc->capflags & CAP_SETENV)) | |
617 return; | |
618 packcmdargs(&hgc->ctx, envp, /*argsize*/ -1); | |
619 writeblockrequest(hgc, "setenv"); | |
620 } |