Merge commit 'junio/next' into next
[git/platforms/storm.git] / exec_cmd.c
blob84db7ee664e78c012221026613c141e126b64bcf
1 #include "cache.h"
2 #include "exec_cmd.h"
3 #include "quote.h"
4 #define MAX_ARGS 32
6 extern char **environ;
7 static const char *argv_exec_path;
9 static const char *builtin_exec_path(void)
11 #ifndef __MINGW32__
12 return GIT_EXEC_PATH;
13 #else
14 int len;
15 char *p, *q, *sl;
16 static char *ep;
17 if (ep)
18 return ep;
20 len = strlen(_pgmptr);
21 if (len < 2)
22 return ep = ".";
24 p = ep = xmalloc(len+1);
25 q = _pgmptr;
26 sl = NULL;
27 /* copy program name, turn '\\' into '/', skip last part */
28 while ((*p = *q)) {
29 if (*q == '\\' || *q == '/') {
30 *p = '/';
31 sl = p;
33 p++, q++;
35 if (sl)
36 *sl = '\0';
37 else
38 ep[0] = '.', ep[1] = '\0';
39 return ep;
40 #endif
43 void git_set_argv_exec_path(const char *exec_path)
45 argv_exec_path = exec_path;
49 /* Returns the highest-priority, location to look for git programs. */
50 const char *git_exec_path(void)
52 const char *env;
54 if (argv_exec_path)
55 return argv_exec_path;
57 env = getenv(EXEC_PATH_ENVIRONMENT);
58 if (env && *env) {
59 return env;
62 return builtin_exec_path();
65 static void add_path(struct strbuf *out, const char *path)
67 if (path && *path) {
68 if (is_absolute_path(path))
69 strbuf_addstr(out, path);
70 else
71 strbuf_addstr(out, make_absolute_path(path));
73 strbuf_addch(out, PATH_SEP);
77 void setup_path(const char *cmd_path)
79 const char *old_path = getenv("PATH");
80 struct strbuf new_path;
82 strbuf_init(&new_path, 0);
84 add_path(&new_path, argv_exec_path);
85 add_path(&new_path, getenv(EXEC_PATH_ENVIRONMENT));
86 add_path(&new_path, builtin_exec_path());
87 add_path(&new_path, cmd_path);
89 if (old_path)
90 strbuf_addstr(&new_path, old_path);
91 else
92 strbuf_addstr(&new_path, "/usr/local/bin:/usr/bin:/bin");
94 setenv("PATH", new_path.buf, 1);
96 strbuf_release(&new_path);
99 int execv_git_cmd(const char **argv)
101 struct strbuf cmd;
102 const char *tmp;
104 strbuf_init(&cmd, 0);
105 strbuf_addf(&cmd, "git-%s", argv[0]);
108 * argv[0] must be the git command, but the argv array
109 * belongs to the caller, and may be reused in
110 * subsequent loop iterations. Save argv[0] and
111 * restore it on error.
113 tmp = argv[0];
114 argv[0] = cmd.buf;
116 trace_argv_printf(argv, "trace: exec:");
118 /* execvp() can only ever return if it fails */
119 execvp(cmd.buf, (char **)argv);
121 trace_printf("trace: exec failed: %s\n", strerror(errno));
123 argv[0] = tmp;
125 strbuf_release(&cmd);
127 return -1;
131 int execl_git_cmd(const char *cmd,...)
133 int argc;
134 const char *argv[MAX_ARGS + 1];
135 const char *arg;
136 va_list param;
138 va_start(param, cmd);
139 argv[0] = cmd;
140 argc = 1;
141 while (argc < MAX_ARGS) {
142 arg = argv[argc++] = va_arg(param, char *);
143 if (!arg)
144 break;
146 va_end(param);
147 if (MAX_ARGS <= argc)
148 return error("too many args to run %s", cmd);
150 argv[argc] = NULL;
151 return execv_git_cmd(argv);