11 #include <sys/ioctl.h>
12 #include "git-compat-util.h"
17 static void prepend_to_path(const char *dir, int len)
19 char *path, *old_path = getenv("PATH");
23 old_path = "/usr/local/bin:/usr/bin:/bin";
25 path_len = len + strlen(old_path) + 1;
27 path = malloc(path_len + 1);
29 memcpy(path, dir, len);
31 memcpy(path + len + 1, old_path, path_len - len);
33 setenv("PATH", path, 1);
36 const char git_version_string[] = GIT_VERSION;
38 static void handle_internal_command(int argc, const char **argv, char **envp)
40 const char *cmd = argv[0];
41 static struct cmd_struct {
43 int (*fn)(int, const char **, char **);
45 { "version", cmd_version },
48 { "whatchanged", cmd_whatchanged },
53 /* Turn "git cmd --help" into "git help cmd" */
54 if (argc > 1 && !strcmp(argv[1], "--help")) {
56 argv[0] = cmd = "help";
59 for (i = 0; i < ARRAY_SIZE(commands); i++) {
60 struct cmd_struct *p = commands+i;
61 if (strcmp(p->cmd, cmd))
63 exit(p->fn(argc, argv, envp));
67 int main(int argc, const char **argv, char **envp)
69 const char *cmd = argv[0];
70 char *slash = strrchr(cmd, '/');
71 char git_command[PATH_MAX + 1];
72 const char *exec_path = NULL;
75 * Take the basename of argv[0] as the command
76 * name, and the dirname as the default exec_path
77 * if it's an absolute path and we don't have
88 * "git-xxxx" is the same as "git xxxx", but we obviously:
90 * - cannot take flags in between the "git" and the "xxxx".
91 * - cannot execute it externally (since it would just do
92 * the same thing over again)
94 * So we just directly call the internal command handler, and
95 * die if that one cannot handle it.
97 if (!strncmp(cmd, "git-", 4)) {
100 handle_internal_command(argc, argv, envp);
101 die("cannot handle %s internally", cmd);
104 /* Default command: "help" */
107 /* Look for flags.. */
112 if (strncmp(cmd, "--", 2))
118 * For legacy reasons, the "version" and "help"
119 * commands can be written with "--" prepended
120 * to make them look like flags.
122 if (!strcmp(cmd, "help"))
124 if (!strcmp(cmd, "version"))
128 * Check remaining flags (which by now must be
129 * "--exec-path", but maybe we will accept
130 * other arguments some day)
132 if (!strncmp(cmd, "exec-path", 9)) {
135 git_set_exec_path(cmd + 1);
138 puts(git_exec_path());
141 cmd_usage(0, NULL, NULL);
146 * We search for git commands in the following order:
148 * - the path of the "git" command if we could find it
150 * - the regular PATH.
153 prepend_to_path(exec_path, strlen(exec_path));
154 exec_path = git_exec_path();
155 prepend_to_path(exec_path, strlen(exec_path));
157 /* See if it's an internal command */
158 handle_internal_command(argc, argv, envp);
160 /* .. then try the external ones */
164 cmd_usage(0, exec_path, "'%s' is not a git-command", cmd);
166 fprintf(stderr, "Failed to run command '%s': %s\n",
167 git_command, strerror(errno));