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chromium / external / github.com / git / git / refs/tags/v2.10.1 / . / exec_cmd.c
blob: 9d5703a157fe8e9d8396e0771798e54dc5eea6eb [file] [log] [blame]
Michal Ostrowski77cb17e2006-01-11 02:12:17[diff] [blame]1#include "cache.h"
2#include "exec_cmd.h"
Matthias Lederhofer575ba9d2006-06-25 13:56:18[diff] [blame]3#include "quote.h"
Jeff King20574f52016-02-22 22:44:39[diff] [blame]4#include "argv-array.h"
Michal Ostrowski77cb17e2006-01-11 02:12:17[diff] [blame]5#define MAX_ARGS 32
6
Scott R Parish384df832007-10-27 08:36:51[diff] [blame]7static const char *argv_exec_path;
Johannes Sixte1464ca2008-07-21 19:19:52[diff] [blame]8static const char *argv0_path;
Michal Ostrowski77cb17e2006-01-11 02:12:17[diff] [blame]9
Junio C Hamano59362e52014-11-24 19:33:54[diff] [blame]10char *system_path(const char *path)
Steffen Prohaska2de9de52008-07-13 20:31:18[diff] [blame]11{
Steffen Prohaska35fb0e862009-01-18 12:00:14[diff] [blame]12#ifdef RUNTIME_PREFIX
13 static const char *prefix;
14#else
Steffen Prohaska026fa0d2009-01-18 12:00:09[diff] [blame]15 static const char *prefix = PREFIX;
Steffen Prohaska35fb0e862009-01-18 12:00:14[diff] [blame]16#endif
Steffen Prohaska026fa0d2009-01-18 12:00:09[diff] [blame]17 struct strbuf d = STRBUF_INIT;
18
19 if (is_absolute_path(path))
Junio C Hamano59362e52014-11-24 19:33:54[diff] [blame]20 return xstrdup(path);
Steffen Prohaska026fa0d2009-01-18 12:00:09[diff] [blame]21
Steffen Prohaska35fb0e862009-01-18 12:00:14[diff] [blame]22#ifdef RUNTIME_PREFIX
23 assert(argv0_path);
24 assert(is_absolute_path(argv0_path));
25
Johannes Schindelin024aa7d2009-02-19 19:10:53[diff] [blame]26 if (!prefix &&
27 !(prefix = strip_path_suffix(argv0_path, GIT_EXEC_PATH)) &&
28 !(prefix = strip_path_suffix(argv0_path, BINDIR)) &&
29 !(prefix = strip_path_suffix(argv0_path, "git"))) {
Steffen Prohaska35fb0e862009-01-18 12:00:14[diff] [blame]30 prefix = PREFIX;
Johannes Sixtaa094572010-02-23 11:42:56[diff] [blame]31 trace_printf("RUNTIME_PREFIX requested, "
Steffen Prohaska35fb0e862009-01-18 12:00:14[diff] [blame]32 "but prefix computation failed. "
33 "Using static fallback '%s'.\n", prefix);
34 }
35#endif
36
Steffen Prohaska026fa0d2009-01-18 12:00:09[diff] [blame]37 strbuf_addf(&d, "%s/%s", prefix, path);
Junio C Hamano59362e52014-11-24 19:33:54[diff] [blame]38 return strbuf_detach(&d, NULL);
Steffen Prohaska2de9de52008-07-13 20:31:18[diff] [blame]39}
40
Steve Haslam4dd47c32009-01-18 12:00:10[diff] [blame]41const char *git_extract_argv0_path(const char *argv0)
Johannes Sixte1464ca2008-07-21 19:19:52[diff] [blame]42{
Steffen Prohaska2cd72b02009-01-18 12:00:11[diff] [blame]43 const char *slash;
44
45 if (!argv0 || !*argv0)
46 return NULL;
Steve Haslam4dd47c32009-01-18 12:00:10[diff] [blame]47
Alexander Kuleshovf4598232016-02-19 08:44:48[diff] [blame]48 slash = find_last_dir_sep(argv0);
Steve Haslam4dd47c32009-01-18 12:00:10[diff] [blame]49
Alexander Kuleshovf4598232016-02-19 08:44:48[diff] [blame]50 if (slash) {
Steve Haslam4dd47c32009-01-18 12:00:10[diff] [blame]51 argv0_path = xstrndup(argv0, slash - argv0);
52 return slash + 1;
53 }
54
55 return argv0;
Johannes Sixte1464ca2008-07-21 19:19:52[diff] [blame]56}
57
Scott R Parish384df832007-10-27 08:36:51[diff] [blame]58void git_set_argv_exec_path(const char *exec_path)
Michal Ostrowski77cb17e2006-01-11 02:12:17[diff] [blame]59{
Scott R Parish384df832007-10-27 08:36:51[diff] [blame]60 argv_exec_path = exec_path;
Johannes Sixtc90d5652009-03-21 22:21:18[diff] [blame]61 /*
62 * Propagate this setting to external programs.
63 */
64 setenv(EXEC_PATH_ENVIRONMENT, exec_path, 1);
Michal Ostrowski77cb17e2006-01-11 02:12:17[diff] [blame]65}
66
67
68/* Returns the highest-priority, location to look for git programs. */
Timo Hirvonen962554c2006-02-26 15:13:46[diff] [blame]69const char *git_exec_path(void)
Michal Ostrowski77cb17e2006-01-11 02:12:17[diff] [blame]70{
71 const char *env;
72
Scott R Parish384df832007-10-27 08:36:51[diff] [blame]73 if (argv_exec_path)
74 return argv_exec_path;
Michal Ostrowski77cb17e2006-01-11 02:12:17[diff] [blame]75
Junio C Hamanod4ebc362006-12-19 09:28:15[diff] [blame]76 env = getenv(EXEC_PATH_ENVIRONMENT);
Dmitry V. Levin2b601622006-05-29 00:34:34[diff] [blame]77 if (env && *env) {
Michal Ostrowski77cb17e2006-01-11 02:12:17[diff] [blame]78 return env;
79 }
80
Johannes Sixt49fa65a2008-07-23 19:12:18[diff] [blame]81 return system_path(GIT_EXEC_PATH);
Michal Ostrowski77cb17e2006-01-11 02:12:17[diff] [blame]82}
83
Scott R Parish511707d2007-10-28 11:17:20[diff] [blame]84static void add_path(struct strbuf *out, const char *path)
85{
86 if (path && *path) {
René Scharfe9610dec2014-07-28 18:34:42[diff] [blame]87 strbuf_add_absolute_path(out, path);
Johannes Sixt80ba0742007-12-03 20:55:57[diff] [blame]88 strbuf_addch(out, PATH_SEP);
Scott R Parish511707d2007-10-28 11:17:20[diff] [blame]89 }
90}
91
Johannes Sixte1464ca2008-07-21 19:19:52[diff] [blame]92void setup_path(void)
Scott R Parish511707d2007-10-28 11:17:20[diff] [blame]93{
94 const char *old_path = getenv("PATH");
Brandon Caseyf285a2d2008-10-09 19:12:12[diff] [blame]95 struct strbuf new_path = STRBUF_INIT;
Scott R Parish511707d2007-10-28 11:17:20[diff] [blame]96
Steffen Prohaska8e346282009-01-18 12:00:13[diff] [blame]97 add_path(&new_path, git_exec_path());
Scott R Parish511707d2007-10-28 11:17:20[diff] [blame]98
99 if (old_path)
100 strbuf_addstr(&new_path, old_path);
101 else
Chris Webbcb6a22c2010-04-13 09:07:13[diff] [blame]102 strbuf_addstr(&new_path, _PATH_DEFPATH);
Scott R Parish511707d2007-10-28 11:17:20[diff] [blame]103
104 setenv("PATH", new_path.buf, 1);
105
106 strbuf_release(&new_path);
107}
Michal Ostrowski77cb17e2006-01-11 02:12:17[diff] [blame]108
Jeff King20574f52016-02-22 22:44:39[diff] [blame]109const char **prepare_git_cmd(struct argv_array *out, const char **argv)
Michal Ostrowski77cb17e2006-01-11 02:12:17[diff] [blame]110{
Jeff King20574f52016-02-22 22:44:39[diff] [blame]111 argv_array_push(out, "git");
112 argv_array_pushv(out, argv);
113 return out->argv;
Steffen Prohaska4933e5e2008-07-28 05:50:27[diff] [blame]114}
115
116int execv_git_cmd(const char **argv) {
Jeff King20574f52016-02-22 22:44:39[diff] [blame]117 struct argv_array nargv = ARGV_ARRAY_INIT;
118
119 prepare_git_cmd(&nargv, argv);
120 trace_argv_printf(nargv.argv, "trace: exec:");
Michal Ostrowski77cb17e2006-01-11 02:12:17[diff] [blame]121
Scott R Parish511707d2007-10-28 11:17:20[diff] [blame]122 /* execvp() can only ever return if it fails */
Jeff King20574f52016-02-22 22:44:39[diff] [blame]123 sane_execvp("git", (char **)nargv.argv);
Dmitry V. Levind6859902006-05-30 14:58:52[diff] [blame]124
Scott R Parish511707d2007-10-28 11:17:20[diff] [blame]125 trace_printf("trace: exec failed: %s\n", strerror(errno));
Michal Ostrowski77cb17e2006-01-11 02:12:17[diff] [blame]126
Jeff King20574f52016-02-22 22:44:39[diff] [blame]127 argv_array_clear(&nargv);
Michal Ostrowski77cb17e2006-01-11 02:12:17[diff] [blame]128 return -1;
Michal Ostrowski77cb17e2006-01-11 02:12:17[diff] [blame]129}
130
131
Junio C Hamano9201c702006-03-05 10:47:29[diff] [blame]132int execl_git_cmd(const char *cmd,...)
Michal Ostrowski77cb17e2006-01-11 02:12:17[diff] [blame]133{
134 int argc;
Junio C Hamano9201c702006-03-05 10:47:29[diff] [blame]135 const char *argv[MAX_ARGS + 1];
136 const char *arg;
Michal Ostrowski77cb17e2006-01-11 02:12:17[diff] [blame]137 va_list param;
138
139 va_start(param, cmd);
140 argv[0] = cmd;
141 argc = 1;
142 while (argc < MAX_ARGS) {
143 arg = argv[argc++] = va_arg(param, char *);
144 if (!arg)
145 break;
146 }
147 va_end(param);
148 if (MAX_ARGS <= argc)
149 return error("too many args to run %s", cmd);
150
151 argv[argc] = NULL;
152 return execv_git_cmd(argv);
153}