]>
Commit | Line | Data |
---|---|---|
77cb17e9 | 1 | #include "cache.h" |
0b027f6c | 2 | #include "abspath.h" |
32a8f510 | 3 | #include "environment.h" |
d807c4a0 | 4 | #include "exec-cmd.h" |
f394e093 | 5 | #include "gettext.h" |
575ba9d6 | 6 | #include "quote.h" |
dbbcd44f | 7 | #include "strvec.h" |
77cb17e9 | 8 | |
226c0ddd DJ |
9 | #if defined(RUNTIME_PREFIX) |
10 | ||
11 | #if defined(HAVE_NS_GET_EXECUTABLE_PATH) | |
12 | #include <mach-o/dyld.h> | |
13 | #endif | |
14 | ||
15 | #if defined(HAVE_BSD_KERN_PROC_SYSCTL) | |
16 | #include <sys/param.h> | |
17 | #include <sys/types.h> | |
18 | #include <sys/sysctl.h> | |
19 | #endif | |
20 | ||
21 | #endif /* RUNTIME_PREFIX */ | |
22 | ||
23 | #define MAX_ARGS 32 | |
24 | ||
25 | static const char *system_prefix(void); | |
77cb17e9 | 26 | |
35fb0e86 | 27 | #ifdef RUNTIME_PREFIX |
226c0ddd DJ |
28 | |
29 | /** | |
30 | * When using a runtime prefix, Git dynamically resolves paths relative to its | |
31 | * executable. | |
32 | * | |
33 | * The method for determining the path of the executable is highly | |
34 | * platform-specific. | |
35 | */ | |
36 | ||
37 | /** | |
38 | * Path to the current Git executable. Resolved on startup by | |
39 | * 'git_resolve_executable_dir'. | |
40 | */ | |
41 | static const char *executable_dirname; | |
026fa0d5 | 42 | |
39b2f6af JK |
43 | static const char *system_prefix(void) |
44 | { | |
45 | static const char *prefix; | |
026fa0d5 | 46 | |
226c0ddd DJ |
47 | assert(executable_dirname); |
48 | assert(is_absolute_path(executable_dirname)); | |
35fb0e86 | 49 | |
024aa7d8 | 50 | if (!prefix && |
226c0ddd DJ |
51 | !(prefix = strip_path_suffix(executable_dirname, GIT_EXEC_PATH)) && |
52 | !(prefix = strip_path_suffix(executable_dirname, BINDIR)) && | |
53 | !(prefix = strip_path_suffix(executable_dirname, "git"))) { | |
4d5b4c24 | 54 | prefix = FALLBACK_RUNTIME_PREFIX; |
aa094570 | 55 | trace_printf("RUNTIME_PREFIX requested, " |
35fb0e86 SP |
56 | "but prefix computation failed. " |
57 | "Using static fallback '%s'.\n", prefix); | |
58 | } | |
39b2f6af JK |
59 | return prefix; |
60 | } | |
c1bb33c9 | 61 | |
226c0ddd DJ |
62 | /* |
63 | * Resolves the executable path from argv[0], only if it is absolute. | |
64 | * | |
65 | * Returns 0 on success, -1 on failure. | |
66 | */ | |
67 | static int git_get_exec_path_from_argv0(struct strbuf *buf, const char *argv0) | |
c1bb33c9 JK |
68 | { |
69 | const char *slash; | |
70 | ||
71 | if (!argv0 || !*argv0) | |
226c0ddd | 72 | return -1; |
c1bb33c9 JK |
73 | |
74 | slash = find_last_dir_sep(argv0); | |
226c0ddd DJ |
75 | if (slash) { |
76 | trace_printf("trace: resolved executable path from argv0: %s\n", | |
77 | argv0); | |
78 | strbuf_add_absolute_path(buf, argv0); | |
79 | return 0; | |
80 | } | |
81 | return -1; | |
82 | } | |
c1bb33c9 | 83 | |
226c0ddd DJ |
84 | #ifdef PROCFS_EXECUTABLE_PATH |
85 | /* | |
86 | * Resolves the executable path by examining a procfs symlink. | |
87 | * | |
88 | * Returns 0 on success, -1 on failure. | |
89 | */ | |
90 | static int git_get_exec_path_procfs(struct strbuf *buf) | |
91 | { | |
92 | if (strbuf_realpath(buf, PROCFS_EXECUTABLE_PATH, 0)) { | |
93 | trace_printf( | |
94 | "trace: resolved executable path from procfs: %s\n", | |
95 | buf->buf); | |
96 | return 0; | |
97 | } | |
98 | return -1; | |
99 | } | |
100 | #endif /* PROCFS_EXECUTABLE_PATH */ | |
101 | ||
102 | #ifdef HAVE_BSD_KERN_PROC_SYSCTL | |
103 | /* | |
104 | * Resolves the executable path using KERN_PROC_PATHNAME BSD sysctl. | |
105 | * | |
106 | * Returns 0 on success, -1 on failure. | |
107 | */ | |
108 | static int git_get_exec_path_bsd_sysctl(struct strbuf *buf) | |
109 | { | |
110 | int mib[4]; | |
111 | char path[MAXPATHLEN]; | |
112 | size_t cb = sizeof(path); | |
113 | ||
114 | mib[0] = CTL_KERN; | |
115 | mib[1] = KERN_PROC; | |
116 | mib[2] = KERN_PROC_PATHNAME; | |
117 | mib[3] = -1; | |
118 | if (!sysctl(mib, 4, path, &cb, NULL, 0)) { | |
119 | trace_printf( | |
120 | "trace: resolved executable path from sysctl: %s\n", | |
121 | path); | |
122 | strbuf_addstr(buf, path); | |
123 | return 0; | |
124 | } | |
125 | return -1; | |
126 | } | |
127 | #endif /* HAVE_BSD_KERN_PROC_SYSCTL */ | |
128 | ||
129 | #ifdef HAVE_NS_GET_EXECUTABLE_PATH | |
130 | /* | |
131 | * Resolves the executable path by querying Darwin application stack. | |
132 | * | |
133 | * Returns 0 on success, -1 on failure. | |
134 | */ | |
135 | static int git_get_exec_path_darwin(struct strbuf *buf) | |
136 | { | |
137 | char path[PATH_MAX]; | |
138 | uint32_t size = sizeof(path); | |
139 | if (!_NSGetExecutablePath(path, &size)) { | |
140 | trace_printf( | |
141 | "trace: resolved executable path from Darwin stack: %s\n", | |
142 | path); | |
143 | strbuf_addstr(buf, path); | |
144 | return 0; | |
145 | } | |
146 | return -1; | |
147 | } | |
148 | #endif /* HAVE_NS_GET_EXECUTABLE_PATH */ | |
149 | ||
c1be1cb7 JS |
150 | #ifdef HAVE_WPGMPTR |
151 | /* | |
152 | * Resolves the executable path by using the global variable _wpgmptr. | |
153 | * | |
154 | * Returns 0 on success, -1 on failure. | |
155 | */ | |
156 | static int git_get_exec_path_wpgmptr(struct strbuf *buf) | |
157 | { | |
158 | int len = wcslen(_wpgmptr) * 3 + 1; | |
159 | strbuf_grow(buf, len); | |
160 | len = xwcstoutf(buf->buf, _wpgmptr, len); | |
161 | if (len < 0) | |
162 | return -1; | |
163 | buf->len += len; | |
164 | return 0; | |
165 | } | |
166 | #endif /* HAVE_WPGMPTR */ | |
167 | ||
226c0ddd DJ |
168 | /* |
169 | * Resolves the absolute path of the current executable. | |
170 | * | |
171 | * Returns 0 on success, -1 on failure. | |
172 | */ | |
173 | static int git_get_exec_path(struct strbuf *buf, const char *argv0) | |
174 | { | |
175 | /* | |
176 | * Identifying the executable path is operating system specific. | |
177 | * Selectively employ all available methods in order of preference, | |
178 | * preferring highly-available authoritative methods over | |
179 | * selectively-available or non-authoritative methods. | |
180 | * | |
181 | * All cases fall back on resolving against argv[0] if there isn't a | |
182 | * better functional method. However, note that argv[0] can be | |
183 | * used-supplied on many operating systems, and is not authoritative | |
184 | * in those cases. | |
185 | * | |
186 | * Each of these functions returns 0 on success, so evaluation will stop | |
187 | * after the first successful method. | |
188 | */ | |
189 | if ( | |
190 | #ifdef HAVE_BSD_KERN_PROC_SYSCTL | |
191 | git_get_exec_path_bsd_sysctl(buf) && | |
192 | #endif /* HAVE_BSD_KERN_PROC_SYSCTL */ | |
193 | ||
194 | #ifdef HAVE_NS_GET_EXECUTABLE_PATH | |
195 | git_get_exec_path_darwin(buf) && | |
196 | #endif /* HAVE_NS_GET_EXECUTABLE_PATH */ | |
197 | ||
198 | #ifdef PROCFS_EXECUTABLE_PATH | |
199 | git_get_exec_path_procfs(buf) && | |
200 | #endif /* PROCFS_EXECUTABLE_PATH */ | |
201 | ||
c1be1cb7 JS |
202 | #ifdef HAVE_WPGMPTR |
203 | git_get_exec_path_wpgmptr(buf) && | |
204 | #endif /* HAVE_WPGMPTR */ | |
205 | ||
226c0ddd DJ |
206 | git_get_exec_path_from_argv0(buf, argv0)) { |
207 | return -1; | |
208 | } | |
209 | ||
210 | if (strbuf_normalize_path(buf)) { | |
211 | trace_printf("trace: could not normalize path: %s\n", buf->buf); | |
212 | return -1; | |
213 | } | |
214 | ||
ee4512ed JH |
215 | trace2_cmd_path(buf->buf); |
216 | ||
226c0ddd DJ |
217 | return 0; |
218 | } | |
c1bb33c9 | 219 | |
226c0ddd DJ |
220 | void git_resolve_executable_dir(const char *argv0) |
221 | { | |
222 | struct strbuf buf = STRBUF_INIT; | |
223 | char *resolved; | |
224 | const char *slash; | |
225 | ||
226 | if (git_get_exec_path(&buf, argv0)) { | |
227 | trace_printf( | |
228 | "trace: could not determine executable path from: %s\n", | |
229 | argv0); | |
230 | strbuf_release(&buf); | |
231 | return; | |
232 | } | |
233 | ||
234 | resolved = strbuf_detach(&buf, NULL); | |
235 | slash = find_last_dir_sep(resolved); | |
c1bb33c9 | 236 | if (slash) |
226c0ddd DJ |
237 | resolved[slash - resolved] = '\0'; |
238 | ||
239 | executable_dirname = resolved; | |
240 | trace_printf("trace: resolved executable dir: %s\n", | |
241 | executable_dirname); | |
c1bb33c9 JK |
242 | } |
243 | ||
39b2f6af JK |
244 | #else |
245 | ||
226c0ddd DJ |
246 | /* |
247 | * When not using a runtime prefix, Git uses a hard-coded path. | |
248 | */ | |
39b2f6af JK |
249 | static const char *system_prefix(void) |
250 | { | |
4d5b4c24 | 251 | return FALLBACK_RUNTIME_PREFIX; |
39b2f6af JK |
252 | } |
253 | ||
226c0ddd DJ |
254 | /* |
255 | * This is called during initialization, but No work needs to be done here when | |
256 | * runtime prefix is not being used. | |
257 | */ | |
808e9195 | 258 | void git_resolve_executable_dir(const char *argv0 UNUSED) |
c1bb33c9 JK |
259 | { |
260 | } | |
261 | ||
39b2f6af JK |
262 | #endif /* RUNTIME_PREFIX */ |
263 | ||
264 | char *system_path(const char *path) | |
265 | { | |
266 | struct strbuf d = STRBUF_INIT; | |
267 | ||
268 | if (is_absolute_path(path)) | |
269 | return xstrdup(path); | |
35fb0e86 | 270 | |
39b2f6af | 271 | strbuf_addf(&d, "%s/%s", system_prefix(), path); |
59362e56 | 272 | return strbuf_detach(&d, NULL); |
2de9de5e SP |
273 | } |
274 | ||
226c0ddd DJ |
275 | static const char *exec_path_value; |
276 | ||
277 | void git_set_exec_path(const char *exec_path) | |
77cb17e9 | 278 | { |
226c0ddd | 279 | exec_path_value = exec_path; |
c90d565a JS |
280 | /* |
281 | * Propagate this setting to external programs. | |
282 | */ | |
283 | setenv(EXEC_PATH_ENVIRONMENT, exec_path, 1); | |
77cb17e9 MO |
284 | } |
285 | ||
226c0ddd | 286 | /* Returns the highest-priority location to look for git programs. */ |
962554c6 | 287 | const char *git_exec_path(void) |
77cb17e9 | 288 | { |
226c0ddd | 289 | if (!exec_path_value) { |
007ac544 JK |
290 | const char *env = getenv(EXEC_PATH_ENVIRONMENT); |
291 | if (env && *env) | |
226c0ddd | 292 | exec_path_value = xstrdup(env); |
007ac544 | 293 | else |
226c0ddd | 294 | exec_path_value = system_path(GIT_EXEC_PATH); |
77cb17e9 | 295 | } |
226c0ddd | 296 | return exec_path_value; |
77cb17e9 MO |
297 | } |
298 | ||
511707d4 SP |
299 | static void add_path(struct strbuf *out, const char *path) |
300 | { | |
301 | if (path && *path) { | |
9610decf | 302 | strbuf_add_absolute_path(out, path); |
80ba074f | 303 | strbuf_addch(out, PATH_SEP); |
511707d4 SP |
304 | } |
305 | } | |
306 | ||
e1464ca7 | 307 | void setup_path(void) |
511707d4 | 308 | { |
226c0ddd | 309 | const char *exec_path = git_exec_path(); |
511707d4 | 310 | const char *old_path = getenv("PATH"); |
f285a2d7 | 311 | struct strbuf new_path = STRBUF_INIT; |
511707d4 | 312 | |
226c0ddd DJ |
313 | git_set_exec_path(exec_path); |
314 | add_path(&new_path, exec_path); | |
511707d4 SP |
315 | |
316 | if (old_path) | |
317 | strbuf_addstr(&new_path, old_path); | |
318 | else | |
cb6a22c0 | 319 | strbuf_addstr(&new_path, _PATH_DEFPATH); |
511707d4 SP |
320 | |
321 | setenv("PATH", new_path.buf, 1); | |
322 | ||
323 | strbuf_release(&new_path); | |
324 | } | |
77cb17e9 | 325 | |
ef8d7ac4 | 326 | const char **prepare_git_cmd(struct strvec *out, const char **argv) |
77cb17e9 | 327 | { |
ef8d7ac4 JK |
328 | strvec_push(out, "git"); |
329 | strvec_pushv(out, argv); | |
d70a9eb6 | 330 | return out->v; |
4933e5eb SP |
331 | } |
332 | ||
226c0ddd DJ |
333 | int execv_git_cmd(const char **argv) |
334 | { | |
ef8d7ac4 | 335 | struct strvec nargv = STRVEC_INIT; |
20574f55 JK |
336 | |
337 | prepare_git_cmd(&nargv, argv); | |
d70a9eb6 | 338 | trace_argv_printf(nargv.v, "trace: exec:"); |
575ba9d6 | 339 | |
511707d4 | 340 | /* execvp() can only ever return if it fails */ |
d70a9eb6 | 341 | sane_execvp("git", (char **)nargv.v); |
77cb17e9 | 342 | |
511707d4 | 343 | trace_printf("trace: exec failed: %s\n", strerror(errno)); |
575ba9d6 | 344 | |
ef8d7ac4 | 345 | strvec_clear(&nargv); |
511707d4 | 346 | return -1; |
77cb17e9 MO |
347 | } |
348 | ||
226c0ddd | 349 | int execl_git_cmd(const char *cmd, ...) |
77cb17e9 MO |
350 | { |
351 | int argc; | |
9201c707 JH |
352 | const char *argv[MAX_ARGS + 1]; |
353 | const char *arg; | |
77cb17e9 MO |
354 | va_list param; |
355 | ||
356 | va_start(param, cmd); | |
357 | argv[0] = cmd; | |
358 | argc = 1; | |
359 | while (argc < MAX_ARGS) { | |
360 | arg = argv[argc++] = va_arg(param, char *); | |
361 | if (!arg) | |
362 | break; | |
363 | } | |
364 | va_end(param); | |
365 | if (MAX_ARGS <= argc) | |
31a55e91 | 366 | return error(_("too many args to run %s"), cmd); |
77cb17e9 MO |
367 | |
368 | argv[argc] = NULL; | |
369 | return execv_git_cmd(argv); | |
370 | } |