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Commit | Line | Data |
---|---|---|
77cb17e9 MO |
1 | #include "cache.h" |
2 | #include "exec_cmd.h" | |
575ba9d6 | 3 | #include "quote.h" |
77cb17e9 MO |
4 | #define MAX_ARGS 32 |
5 | ||
6 | extern char **environ; | |
384df833 | 7 | static const char *argv_exec_path; |
e1464ca7 | 8 | static const char *argv0_path; |
77cb17e9 | 9 | |
2de9de5e SP |
10 | const char *system_path(const char *path) |
11 | { | |
026fa0d5 SP |
12 | static const char *prefix = PREFIX; |
13 | struct strbuf d = STRBUF_INIT; | |
14 | ||
15 | if (is_absolute_path(path)) | |
16 | return path; | |
17 | ||
18 | strbuf_addf(&d, "%s/%s", prefix, path); | |
19 | path = strbuf_detach(&d, NULL); | |
2de9de5e SP |
20 | return path; |
21 | } | |
22 | ||
4dd47c3b | 23 | const char *git_extract_argv0_path(const char *argv0) |
e1464ca7 | 24 | { |
2cd72b0b SP |
25 | const char *slash; |
26 | ||
27 | if (!argv0 || !*argv0) | |
28 | return NULL; | |
29 | slash = argv0 + strlen(argv0); | |
4dd47c3b SH |
30 | |
31 | while (argv0 <= slash && !is_dir_sep(*slash)) | |
32 | slash--; | |
33 | ||
34 | if (slash >= argv0) { | |
35 | argv0_path = xstrndup(argv0, slash - argv0); | |
36 | return slash + 1; | |
37 | } | |
38 | ||
39 | return argv0; | |
e1464ca7 JS |
40 | } |
41 | ||
384df833 | 42 | void git_set_argv_exec_path(const char *exec_path) |
77cb17e9 | 43 | { |
384df833 | 44 | argv_exec_path = exec_path; |
77cb17e9 MO |
45 | } |
46 | ||
47 | ||
48 | /* Returns the highest-priority, location to look for git programs. */ | |
962554c6 | 49 | const char *git_exec_path(void) |
77cb17e9 MO |
50 | { |
51 | const char *env; | |
52 | ||
384df833 SP |
53 | if (argv_exec_path) |
54 | return argv_exec_path; | |
77cb17e9 | 55 | |
d4ebc36c | 56 | env = getenv(EXEC_PATH_ENVIRONMENT); |
2b601626 | 57 | if (env && *env) { |
77cb17e9 MO |
58 | return env; |
59 | } | |
60 | ||
49fa65a7 | 61 | return system_path(GIT_EXEC_PATH); |
77cb17e9 MO |
62 | } |
63 | ||
511707d4 SP |
64 | static void add_path(struct strbuf *out, const char *path) |
65 | { | |
66 | if (path && *path) { | |
67 | if (is_absolute_path(path)) | |
68 | strbuf_addstr(out, path); | |
69 | else | |
10c4c881 | 70 | strbuf_addstr(out, make_nonrelative_path(path)); |
511707d4 | 71 | |
80ba074f | 72 | strbuf_addch(out, PATH_SEP); |
511707d4 SP |
73 | } |
74 | } | |
75 | ||
e1464ca7 | 76 | void setup_path(void) |
511707d4 SP |
77 | { |
78 | const char *old_path = getenv("PATH"); | |
f285a2d7 | 79 | struct strbuf new_path = STRBUF_INIT; |
511707d4 | 80 | |
8e346283 | 81 | add_path(&new_path, git_exec_path()); |
e1464ca7 | 82 | add_path(&new_path, argv0_path); |
511707d4 SP |
83 | |
84 | if (old_path) | |
85 | strbuf_addstr(&new_path, old_path); | |
86 | else | |
87 | strbuf_addstr(&new_path, "/usr/local/bin:/usr/bin:/bin"); | |
88 | ||
89 | setenv("PATH", new_path.buf, 1); | |
90 | ||
91 | strbuf_release(&new_path); | |
92 | } | |
77cb17e9 | 93 | |
4933e5eb | 94 | const char **prepare_git_cmd(const char **argv) |
77cb17e9 | 95 | { |
7550be0a JH |
96 | int argc; |
97 | const char **nargv; | |
77cb17e9 | 98 | |
7550be0a JH |
99 | for (argc = 0; argv[argc]; argc++) |
100 | ; /* just counting */ | |
101 | nargv = xmalloc(sizeof(*nargv) * (argc + 2)); | |
77cb17e9 | 102 | |
7550be0a JH |
103 | nargv[0] = "git"; |
104 | for (argc = 0; argv[argc]; argc++) | |
105 | nargv[argc + 1] = argv[argc]; | |
106 | nargv[argc + 1] = NULL; | |
4933e5eb SP |
107 | return nargv; |
108 | } | |
109 | ||
110 | int execv_git_cmd(const char **argv) { | |
111 | const char **nargv = prepare_git_cmd(argv); | |
7550be0a | 112 | trace_argv_printf(nargv, "trace: exec:"); |
575ba9d6 | 113 | |
511707d4 | 114 | /* execvp() can only ever return if it fails */ |
7550be0a | 115 | execvp("git", (char **)nargv); |
77cb17e9 | 116 | |
511707d4 | 117 | trace_printf("trace: exec failed: %s\n", strerror(errno)); |
575ba9d6 | 118 | |
7550be0a | 119 | free(nargv); |
511707d4 | 120 | return -1; |
77cb17e9 MO |
121 | } |
122 | ||
123 | ||
9201c707 | 124 | int execl_git_cmd(const char *cmd,...) |
77cb17e9 MO |
125 | { |
126 | int argc; | |
9201c707 JH |
127 | const char *argv[MAX_ARGS + 1]; |
128 | const char *arg; | |
77cb17e9 MO |
129 | va_list param; |
130 | ||
131 | va_start(param, cmd); | |
132 | argv[0] = cmd; | |
133 | argc = 1; | |
134 | while (argc < MAX_ARGS) { | |
135 | arg = argv[argc++] = va_arg(param, char *); | |
136 | if (!arg) | |
137 | break; | |
138 | } | |
139 | va_end(param); | |
140 | if (MAX_ARGS <= argc) | |
141 | return error("too many args to run %s", cmd); | |
142 | ||
143 | argv[argc] = NULL; | |
144 | return execv_git_cmd(argv); | |
145 | } |