Document gitk --argscmd flag.
[git/git.git] / shell.c
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35eb2d36
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1#include "cache.h"
2#include "quote.h"
77cb17e9 3#include "exec_cmd.h"
0c696fe7 4#include "strbuf.h"
35eb2d36 5
5b8e6f85
DP
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 */
9void release_pack_memory(size_t need, int fd){}
10void trace_argv_printf(const char **argv, const char *fmt, ...){}
11void trace_printf(const char *fmt, ...){}
12
13
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14static int do_generic_cmd(const char *me, char *arg)
15{
16 const char *my_argv[4];
17
e1464ca7 18 setup_path();
ab5f8627 19 if (!arg || !(arg = sq_dequote(arg)))
35eb2d36 20 die("bad argument");
cc44c765 21 if (prefixcmp(me, "git-"))
77cb17e9 22 die("bad command");
35eb2d36 23
77cb17e9 24 my_argv[0] = me + 4;
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25 my_argv[1] = arg;
26 my_argv[2] = NULL;
27
9201c707 28 return execv_git_cmd(my_argv);
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29}
30
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31static int do_cvs_cmd(const char *me, char *arg)
32{
33 const char *cvsserver_argv[3] = {
34 "cvsserver", "server", NULL
35 };
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36
37 if (!arg || strcmp(arg, "server"))
38 die("git-cvsserver only handles server: %s", arg);
39
e1464ca7 40 setup_path();
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41 return execv_git_cmd(cvsserver_argv);
42}
43
44
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45static 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 },
0c696fe7 51 { "cvs", do_cvs_cmd },
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52 { NULL },
53};
54
55int main(int argc, char **argv)
56{
57 char *prog;
58 struct commands *cmd;
59
bc7c73e2
JH
60 /*
61 * Special hack to pretend to be a CVS server
62 */
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63 if (argc == 2 && !strcmp(argv[1], "cvs server"))
64 argv--;
bc7c73e2
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65
66 /*
67 * We do not accept anything but "-c" followed by "cmd arg",
68 * where "cmd" is a very limited subset of git commands.
69 */
0c696fe7 70 else if (argc != 3 || strcmp(argv[1], "-c"))
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71 die("What do you think I am? A shell?");
72
73 prog = argv[2];
bc7c73e2
JH
74 if (!strncmp(prog, "git", 3) && isspace(prog[3]))
75 /* Accept "git foo" as if the caller said "git-foo". */
76 prog[3] = '-';
77
35eb2d36
LT
78 for (cmd = cmd_list ; cmd->name ; cmd++) {
79 int len = strlen(cmd->name);
80 char *arg;
81 if (strncmp(cmd->name, prog, len))
82 continue;
83 arg = NULL;
84 switch (prog[len]) {
85 case '\0':
86 arg = NULL;
87 break;
88 case ' ':
89 arg = prog + len + 1;
90 break;
91 default:
92 continue;
93 }
94 exit(cmd->exec(cmd->name, arg));
95 }
96 die("unrecognized command '%s'", prog);
97}