Merge branch 'ks/maint-1.6.0-mailinfo-folded' into maint-1.6.0
[git/git.git] / exec_cmd.c
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1#include "cache.h"
2#include "exec_cmd.h"
575ba9d6 3#include "quote.h"
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4#define MAX_ARGS 32
5
6extern char **environ;
384df833 7static const char *argv_exec_path;
e1464ca7 8static const char *argv0_path;
77cb17e9 9
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10const char *system_path(const char *path)
11{
966c6edd 12 if (!is_absolute_path(path) && argv0_path) {
2de9de5e 13 struct strbuf d = STRBUF_INIT;
966c6edd 14 strbuf_addf(&d, "%s/%s", argv0_path, path);
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15 path = strbuf_detach(&d, NULL);
16 }
17 return path;
18}
19
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20void git_set_argv0_path(const char *path)
21{
22 argv0_path = path;
23}
24
384df833 25void git_set_argv_exec_path(const char *exec_path)
77cb17e9 26{
384df833 27 argv_exec_path = exec_path;
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28}
29
30
31/* Returns the highest-priority, location to look for git programs. */
962554c6 32const char *git_exec_path(void)
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33{
34 const char *env;
35
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36 if (argv_exec_path)
37 return argv_exec_path;
77cb17e9 38
d4ebc36c 39 env = getenv(EXEC_PATH_ENVIRONMENT);
2b601626 40 if (env && *env) {
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41 return env;
42 }
43
49fa65a7 44 return system_path(GIT_EXEC_PATH);
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45}
46
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47static void add_path(struct strbuf *out, const char *path)
48{
49 if (path && *path) {
50 if (is_absolute_path(path))
51 strbuf_addstr(out, path);
52 else
10c4c881 53 strbuf_addstr(out, make_nonrelative_path(path));
511707d4 54
80ba074f 55 strbuf_addch(out, PATH_SEP);
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56 }
57}
58
e1464ca7 59void setup_path(void)
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60{
61 const char *old_path = getenv("PATH");
62 struct strbuf new_path;
63
64 strbuf_init(&new_path, 0);
65
66 add_path(&new_path, argv_exec_path);
67 add_path(&new_path, getenv(EXEC_PATH_ENVIRONMENT));
49fa65a7 68 add_path(&new_path, system_path(GIT_EXEC_PATH));
e1464ca7 69 add_path(&new_path, argv0_path);
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70
71 if (old_path)
72 strbuf_addstr(&new_path, old_path);
73 else
74 strbuf_addstr(&new_path, "/usr/local/bin:/usr/bin:/bin");
75
76 setenv("PATH", new_path.buf, 1);
77
78 strbuf_release(&new_path);
79}
77cb17e9 80
4933e5eb 81const char **prepare_git_cmd(const char **argv)
77cb17e9 82{
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83 int argc;
84 const char **nargv;
77cb17e9 85
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86 for (argc = 0; argv[argc]; argc++)
87 ; /* just counting */
88 nargv = xmalloc(sizeof(*nargv) * (argc + 2));
77cb17e9 89
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90 nargv[0] = "git";
91 for (argc = 0; argv[argc]; argc++)
92 nargv[argc + 1] = argv[argc];
93 nargv[argc + 1] = NULL;
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94 return nargv;
95}
96
97int execv_git_cmd(const char **argv) {
98 const char **nargv = prepare_git_cmd(argv);
7550be0a 99 trace_argv_printf(nargv, "trace: exec:");
575ba9d6 100
511707d4 101 /* execvp() can only ever return if it fails */
7550be0a 102 execvp("git", (char **)nargv);
77cb17e9 103
511707d4 104 trace_printf("trace: exec failed: %s\n", strerror(errno));
575ba9d6 105
7550be0a 106 free(nargv);
511707d4 107 return -1;
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108}
109
110
9201c707 111int execl_git_cmd(const char *cmd,...)
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112{
113 int argc;
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114 const char *argv[MAX_ARGS + 1];
115 const char *arg;
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116 va_list param;
117
118 va_start(param, cmd);
119 argv[0] = cmd;
120 argc = 1;
121 while (argc < MAX_ARGS) {
122 arg = argv[argc++] = va_arg(param, char *);
123 if (!arg)
124 break;
125 }
126 va_end(param);
127 if (MAX_ARGS <= argc)
128 return error("too many args to run %s", cmd);
129
130 argv[argc] = NULL;
131 return execv_git_cmd(argv);
132}