Start conforming code to "git subcmd" style part 2
[git/mingw.git] / shell.c
blobad60200d28e9957f54a34435f5dc59fce412666c
1 #include "cache.h"
2 #include "quote.h"
3 #include "exec_cmd.h"
4 #include "strbuf.h"
6 /* Stubs for functions that make no sense for git-shell. These stubs
7 * are provided here to avoid linking in external redundant modules.
8 */
9 void release_pack_memory(size_t need, int fd){}
10 void trace_argv_printf(const char **argv, const char *fmt, ...){}
11 void trace_printf(const char *fmt, ...){}
14 static int do_generic_cmd(const char *me, char *arg)
16 const char *my_argv[4];
18 setup_path();
19 if (!arg || !(arg = sq_dequote(arg)))
20 die("bad argument");
21 if (prefixcmp(me, "git-"))
22 die("bad command");
24 my_argv[0] = me + 4;
25 my_argv[1] = arg;
26 my_argv[2] = NULL;
28 return execv_git_cmd(my_argv);
31 static int do_cvs_cmd(const char *me, char *arg)
33 const char *cvsserver_argv[3] = {
34 "cvsserver", "server", NULL
37 if (!arg || strcmp(arg, "server"))
38 die("git-cvsserver only handles server: %s", arg);
40 setup_path();
41 return execv_git_cmd(cvsserver_argv);
45 static struct commands {
46 const char *name;
47 int (*exec)(const char *me, char *arg);
48 } cmd_list[] = {
49 { "git-receive-pack", do_generic_cmd },
50 { "git-upload-pack", do_generic_cmd },
51 { "cvs", do_cvs_cmd },
52 { NULL },
55 int main(int argc, char **argv)
57 char *prog;
58 struct commands *cmd;
59 int devnull_fd;
62 * Always open file descriptors 0/1/2 to avoid clobbering files
63 * in die(). It also avoids not messing up when the pipes are
64 * dup'ed onto stdin/stdout/stderr in the child processes we spawn.
66 devnull_fd = open("/dev/null", O_RDWR);
67 while (devnull_fd >= 0 && devnull_fd <= 2)
68 devnull_fd = dup(devnull_fd);
69 if (devnull_fd == -1)
70 die("opening /dev/null failed (%s)", strerror(errno));
71 close (devnull_fd);
74 * Special hack to pretend to be a CVS server
76 if (argc == 2 && !strcmp(argv[1], "cvs server"))
77 argv--;
80 * We do not accept anything but "-c" followed by "cmd arg",
81 * where "cmd" is a very limited subset of git commands.
83 else if (argc != 3 || strcmp(argv[1], "-c"))
84 die("What do you think I am? A shell?");
86 prog = argv[2];
87 if (!strncmp(prog, "git", 3) && isspace(prog[3]))
88 /* Accept "git foo" as if the caller said "git-foo". */
89 prog[3] = '-';
91 for (cmd = cmd_list ; cmd->name ; cmd++) {
92 int len = strlen(cmd->name);
93 char *arg;
94 if (strncmp(cmd->name, prog, len))
95 continue;
96 arg = NULL;
97 switch (prog[len]) {
98 case '\0':
99 arg = NULL;
100 break;
101 case ' ':
102 arg = prog + len + 1;
103 break;
104 default:
105 continue;
107 exit(cmd->exec(cmd->name, arg));
109 die("unrecognized command '%s'", prog);