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1 | #include "cache.h" | |
2 | #include "quote.h" | |
3 | #include "exec_cmd.h" | |
4 | #include "strbuf.h" | |
5 | ||
6 | static int do_generic_cmd(const char *me, char *arg) | |
7 | { | |
8 | const char *my_argv[4]; | |
9 | ||
10 | setup_path(); | |
11 | if (!arg || !(arg = sq_dequote(arg))) | |
12 | die("bad argument"); | |
13 | if (prefixcmp(me, "git-")) | |
14 | die("bad command"); | |
15 | ||
16 | my_argv[0] = me + 4; | |
17 | my_argv[1] = arg; | |
18 | my_argv[2] = NULL; | |
19 | ||
20 | return execv_git_cmd(my_argv); | |
21 | } | |
22 | ||
23 | static int do_cvs_cmd(const char *me, char *arg) | |
24 | { | |
25 | const char *cvsserver_argv[3] = { | |
26 | "cvsserver", "server", NULL | |
27 | }; | |
28 | ||
29 | if (!arg || strcmp(arg, "server")) | |
30 | die("git-cvsserver only handles server: %s", arg); | |
31 | ||
32 | setup_path(); | |
33 | return execv_git_cmd(cvsserver_argv); | |
34 | } | |
35 | ||
36 | ||
37 | static struct commands { | |
38 | const char *name; | |
39 | int (*exec)(const char *me, char *arg); | |
40 | } cmd_list[] = { | |
41 | { "git-receive-pack", do_generic_cmd }, | |
42 | { "git-upload-pack", do_generic_cmd }, | |
43 | { "git-upload-archive", do_generic_cmd }, | |
44 | { "cvs", do_cvs_cmd }, | |
45 | { NULL }, | |
46 | }; | |
47 | ||
48 | int main(int argc, char **argv) | |
49 | { | |
50 | char *prog; | |
51 | struct commands *cmd; | |
52 | int devnull_fd; | |
53 | ||
54 | /* | |
55 | * Always open file descriptors 0/1/2 to avoid clobbering files | |
56 | * in die(). It also avoids not messing up when the pipes are | |
57 | * dup'ed onto stdin/stdout/stderr in the child processes we spawn. | |
58 | */ | |
59 | devnull_fd = open("/dev/null", O_RDWR); | |
60 | while (devnull_fd >= 0 && devnull_fd <= 2) | |
61 | devnull_fd = dup(devnull_fd); | |
62 | if (devnull_fd == -1) | |
63 | die_errno("opening /dev/null failed"); | |
64 | close (devnull_fd); | |
65 | ||
66 | /* | |
67 | * Special hack to pretend to be a CVS server | |
68 | */ | |
69 | if (argc == 2 && !strcmp(argv[1], "cvs server")) | |
70 | argv--; | |
71 | ||
72 | /* | |
73 | * We do not accept anything but "-c" followed by "cmd arg", | |
74 | * where "cmd" is a very limited subset of git commands. | |
75 | */ | |
76 | else if (argc != 3 || strcmp(argv[1], "-c")) | |
77 | die("What do you think I am? A shell?"); | |
78 | ||
79 | prog = argv[2]; | |
80 | if (!strncmp(prog, "git", 3) && isspace(prog[3])) | |
81 | /* Accept "git foo" as if the caller said "git-foo". */ | |
82 | prog[3] = '-'; | |
83 | ||
84 | for (cmd = cmd_list ; cmd->name ; cmd++) { | |
85 | int len = strlen(cmd->name); | |
86 | char *arg; | |
87 | if (strncmp(cmd->name, prog, len)) | |
88 | continue; | |
89 | arg = NULL; | |
90 | switch (prog[len]) { | |
91 | case '\0': | |
92 | arg = NULL; | |
93 | break; | |
94 | case ' ': | |
95 | arg = prog + len + 1; | |
96 | break; | |
97 | default: | |
98 | continue; | |
99 | } | |
100 | exit(cmd->exec(cmd->name, arg)); | |
101 | } | |
102 | die("unrecognized command '%s'", prog); | |
103 | } |