Merge branch 'rs/plug-leak-in-pack-bitmaps' into maint
[git.git] / exec_cmd.c
blobe85f0fd8d897f4823a7c765d6b6ef929a15ca679
1 #include "cache.h"
2 #include "exec_cmd.h"
3 #include "quote.h"
4 #define MAX_ARGS 32
6 static const char *argv_exec_path;
7 static const char *argv0_path;
9 char *system_path(const char *path)
11 #ifdef RUNTIME_PREFIX
12 static const char *prefix;
13 #else
14 static const char *prefix = PREFIX;
15 #endif
16 struct strbuf d = STRBUF_INIT;
18 if (is_absolute_path(path))
19 return xstrdup(path);
21 #ifdef RUNTIME_PREFIX
22 assert(argv0_path);
23 assert(is_absolute_path(argv0_path));
25 if (!prefix &&
26 !(prefix = strip_path_suffix(argv0_path, GIT_EXEC_PATH)) &&
27 !(prefix = strip_path_suffix(argv0_path, BINDIR)) &&
28 !(prefix = strip_path_suffix(argv0_path, "git"))) {
29 prefix = PREFIX;
30 trace_printf("RUNTIME_PREFIX requested, "
31 "but prefix computation failed. "
32 "Using static fallback '%s'.\n", prefix);
34 #endif
36 strbuf_addf(&d, "%s/%s", prefix, path);
37 return strbuf_detach(&d, NULL);
40 const char *git_extract_argv0_path(const char *argv0)
42 const char *slash;
44 if (!argv0 || !*argv0)
45 return NULL;
46 slash = argv0 + strlen(argv0);
48 while (argv0 <= slash && !is_dir_sep(*slash))
49 slash--;
51 if (slash >= argv0) {
52 argv0_path = xstrndup(argv0, slash - argv0);
53 return slash + 1;
56 return argv0;
59 void git_set_argv_exec_path(const char *exec_path)
61 argv_exec_path = exec_path;
63 * Propagate this setting to external programs.
65 setenv(EXEC_PATH_ENVIRONMENT, exec_path, 1);
69 /* Returns the highest-priority, location to look for git programs. */
70 const char *git_exec_path(void)
72 const char *env;
74 if (argv_exec_path)
75 return argv_exec_path;
77 env = getenv(EXEC_PATH_ENVIRONMENT);
78 if (env && *env) {
79 return env;
82 return system_path(GIT_EXEC_PATH);
85 static void add_path(struct strbuf *out, const char *path)
87 if (path && *path) {
88 strbuf_add_absolute_path(out, path);
89 strbuf_addch(out, PATH_SEP);
93 void setup_path(void)
95 const char *old_path = getenv("PATH");
96 struct strbuf new_path = STRBUF_INIT;
98 add_path(&new_path, git_exec_path());
100 if (old_path)
101 strbuf_addstr(&new_path, old_path);
102 else
103 strbuf_addstr(&new_path, _PATH_DEFPATH);
105 setenv("PATH", new_path.buf, 1);
107 strbuf_release(&new_path);
110 const char **prepare_git_cmd(const char **argv)
112 int argc;
113 const char **nargv;
115 for (argc = 0; argv[argc]; argc++)
116 ; /* just counting */
117 nargv = xmalloc(sizeof(*nargv) * (argc + 2));
119 nargv[0] = "git";
120 for (argc = 0; argv[argc]; argc++)
121 nargv[argc + 1] = argv[argc];
122 nargv[argc + 1] = NULL;
123 return nargv;
126 int execv_git_cmd(const char **argv) {
127 const char **nargv = prepare_git_cmd(argv);
128 trace_argv_printf(nargv, "trace: exec:");
130 /* execvp() can only ever return if it fails */
131 sane_execvp("git", (char **)nargv);
133 trace_printf("trace: exec failed: %s\n", strerror(errno));
135 free(nargv);
136 return -1;
140 int execl_git_cmd(const char *cmd,...)
142 int argc;
143 const char *argv[MAX_ARGS + 1];
144 const char *arg;
145 va_list param;
147 va_start(param, cmd);
148 argv[0] = cmd;
149 argc = 1;
150 while (argc < MAX_ARGS) {
151 arg = argv[argc++] = va_arg(param, char *);
152 if (!arg)
153 break;
155 va_end(param);
156 if (MAX_ARGS <= argc)
157 return error("too many args to run %s", cmd);
159 argv[argc] = NULL;
160 return execv_git_cmd(argv);