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Commit | Line | Data |
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77cb17e9 MO |
1 | #include "cache.h" |
2 | #include "exec_cmd.h" | |
575ba9d6 | 3 | #include "quote.h" |
77cb17e9 MO |
4 | #define MAX_ARGS 32 |
5 | ||
384df833 | 6 | static const char *argv_exec_path; |
e1464ca7 | 7 | static const char *argv0_path; |
77cb17e9 | 8 | |
59362e56 | 9 | char *system_path(const char *path) |
2de9de5e | 10 | { |
35fb0e86 SP |
11 | #ifdef RUNTIME_PREFIX |
12 | static const char *prefix; | |
13 | #else | |
026fa0d5 | 14 | static const char *prefix = PREFIX; |
35fb0e86 | 15 | #endif |
026fa0d5 SP |
16 | struct strbuf d = STRBUF_INIT; |
17 | ||
18 | if (is_absolute_path(path)) | |
59362e56 | 19 | return xstrdup(path); |
026fa0d5 | 20 | |
35fb0e86 SP |
21 | #ifdef RUNTIME_PREFIX |
22 | assert(argv0_path); | |
23 | assert(is_absolute_path(argv0_path)); | |
24 | ||
024aa7d8 JS |
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"))) { | |
35fb0e86 | 29 | prefix = PREFIX; |
aa094570 | 30 | trace_printf("RUNTIME_PREFIX requested, " |
35fb0e86 SP |
31 | "but prefix computation failed. " |
32 | "Using static fallback '%s'.\n", prefix); | |
33 | } | |
34 | #endif | |
35 | ||
026fa0d5 | 36 | strbuf_addf(&d, "%s/%s", prefix, path); |
59362e56 | 37 | return strbuf_detach(&d, NULL); |
2de9de5e SP |
38 | } |
39 | ||
4dd47c3b | 40 | const char *git_extract_argv0_path(const char *argv0) |
e1464ca7 | 41 | { |
2cd72b0b SP |
42 | const char *slash; |
43 | ||
44 | if (!argv0 || !*argv0) | |
45 | return NULL; | |
46 | slash = argv0 + strlen(argv0); | |
4dd47c3b SH |
47 | |
48 | while (argv0 <= slash && !is_dir_sep(*slash)) | |
49 | slash--; | |
50 | ||
51 | if (slash >= argv0) { | |
52 | argv0_path = xstrndup(argv0, slash - argv0); | |
53 | return slash + 1; | |
54 | } | |
55 | ||
56 | return argv0; | |
e1464ca7 JS |
57 | } |
58 | ||
384df833 | 59 | void git_set_argv_exec_path(const char *exec_path) |
77cb17e9 | 60 | { |
384df833 | 61 | argv_exec_path = exec_path; |
c90d565a JS |
62 | /* |
63 | * Propagate this setting to external programs. | |
64 | */ | |
65 | setenv(EXEC_PATH_ENVIRONMENT, exec_path, 1); | |
77cb17e9 MO |
66 | } |
67 | ||
68 | ||
69 | /* Returns the highest-priority, location to look for git programs. */ | |
962554c6 | 70 | const char *git_exec_path(void) |
77cb17e9 MO |
71 | { |
72 | const char *env; | |
73 | ||
384df833 SP |
74 | if (argv_exec_path) |
75 | return argv_exec_path; | |
77cb17e9 | 76 | |
d4ebc36c | 77 | env = getenv(EXEC_PATH_ENVIRONMENT); |
2b601626 | 78 | if (env && *env) { |
77cb17e9 MO |
79 | return env; |
80 | } | |
81 | ||
49fa65a7 | 82 | return system_path(GIT_EXEC_PATH); |
77cb17e9 MO |
83 | } |
84 | ||
511707d4 SP |
85 | static void add_path(struct strbuf *out, const char *path) |
86 | { | |
87 | if (path && *path) { | |
9610decf | 88 | strbuf_add_absolute_path(out, path); |
80ba074f | 89 | strbuf_addch(out, PATH_SEP); |
511707d4 SP |
90 | } |
91 | } | |
92 | ||
e1464ca7 | 93 | void setup_path(void) |
511707d4 SP |
94 | { |
95 | const char *old_path = getenv("PATH"); | |
f285a2d7 | 96 | struct strbuf new_path = STRBUF_INIT; |
511707d4 | 97 | |
8e346283 | 98 | add_path(&new_path, git_exec_path()); |
511707d4 SP |
99 | |
100 | if (old_path) | |
101 | strbuf_addstr(&new_path, old_path); | |
102 | else | |
cb6a22c0 | 103 | strbuf_addstr(&new_path, _PATH_DEFPATH); |
511707d4 SP |
104 | |
105 | setenv("PATH", new_path.buf, 1); | |
106 | ||
107 | strbuf_release(&new_path); | |
108 | } | |
77cb17e9 | 109 | |
4933e5eb | 110 | const char **prepare_git_cmd(const char **argv) |
77cb17e9 | 111 | { |
7550be0a JH |
112 | int argc; |
113 | const char **nargv; | |
77cb17e9 | 114 | |
7550be0a JH |
115 | for (argc = 0; argv[argc]; argc++) |
116 | ; /* just counting */ | |
117 | nargv = xmalloc(sizeof(*nargv) * (argc + 2)); | |
77cb17e9 | 118 | |
7550be0a JH |
119 | nargv[0] = "git"; |
120 | for (argc = 0; argv[argc]; argc++) | |
121 | nargv[argc + 1] = argv[argc]; | |
122 | nargv[argc + 1] = NULL; | |
4933e5eb SP |
123 | return nargv; |
124 | } | |
125 | ||
126 | int execv_git_cmd(const char **argv) { | |
127 | const char **nargv = prepare_git_cmd(argv); | |
7550be0a | 128 | trace_argv_printf(nargv, "trace: exec:"); |
575ba9d6 | 129 | |
511707d4 | 130 | /* execvp() can only ever return if it fails */ |
38f865c2 | 131 | sane_execvp("git", (char **)nargv); |
77cb17e9 | 132 | |
511707d4 | 133 | trace_printf("trace: exec failed: %s\n", strerror(errno)); |
575ba9d6 | 134 | |
7550be0a | 135 | free(nargv); |
511707d4 | 136 | return -1; |
77cb17e9 MO |
137 | } |
138 | ||
139 | ||
9201c707 | 140 | int execl_git_cmd(const char *cmd,...) |
77cb17e9 MO |
141 | { |
142 | int argc; | |
9201c707 JH |
143 | const char *argv[MAX_ARGS + 1]; |
144 | const char *arg; | |
77cb17e9 MO |
145 | va_list param; |
146 | ||
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; | |
154 | } | |
155 | va_end(param); | |
156 | if (MAX_ARGS <= argc) | |
157 | return error("too many args to run %s", cmd); | |
158 | ||
159 | argv[argc] = NULL; | |
160 | return execv_git_cmd(argv); | |
161 | } |