Merge branch 'maint'
[git/dkf.git] / rsh.c
blob5754a230e2c23ce3fea255fccd8726af76c13317
1 #include "cache.h"
2 #include "rsh.h"
3 #include "quote.h"
5 #define COMMAND_SIZE 4096
7 int setup_connection(int *fd_in, int *fd_out, const char *remote_prog,
8 char *url, int rmt_argc, char **rmt_argv)
10 char *host;
11 char *path;
12 int sv[2];
13 char command[COMMAND_SIZE];
14 char *posn;
15 int sizen;
16 int of;
17 int i;
18 pid_t pid;
20 if (!strcmp(url, "-")) {
21 *fd_in = 0;
22 *fd_out = 1;
23 return 0;
26 host = strstr(url, "//");
27 if (host) {
28 host += 2;
29 path = strchr(host, '/');
30 } else {
31 host = url;
32 path = strchr(host, ':');
33 if (path)
34 *(path++) = '\0';
36 if (!path) {
37 return error("Bad URL: %s", url);
39 /* $GIT_RSH <host> "env GIT_DIR=<path> <remote_prog> <args...>" */
40 sizen = COMMAND_SIZE;
41 posn = command;
42 of = 0;
43 of |= add_to_string(&posn, &sizen, "env ", 0);
44 of |= add_to_string(&posn, &sizen, GIT_DIR_ENVIRONMENT "=", 0);
45 of |= add_to_string(&posn, &sizen, path, 1);
46 of |= add_to_string(&posn, &sizen, " ", 0);
47 of |= add_to_string(&posn, &sizen, remote_prog, 1);
49 for ( i = 0 ; i < rmt_argc ; i++ ) {
50 of |= add_to_string(&posn, &sizen, " ", 0);
51 of |= add_to_string(&posn, &sizen, rmt_argv[i], 1);
54 of |= add_to_string(&posn, &sizen, " -", 0);
56 if ( of )
57 return error("Command line too long");
59 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv))
60 return error("Couldn't create socket");
62 pid = fork();
63 if (pid < 0)
64 return error("Couldn't fork");
65 if (!pid) {
66 const char *ssh, *ssh_basename;
67 ssh = getenv("GIT_SSH");
68 if (!ssh) ssh = "ssh";
69 ssh_basename = strrchr(ssh, '/');
70 if (!ssh_basename)
71 ssh_basename = ssh;
72 else
73 ssh_basename++;
74 close(sv[1]);
75 dup2(sv[0], 0);
76 dup2(sv[0], 1);
77 execlp(ssh, ssh_basename, host, command, NULL);
79 close(sv[0]);
80 *fd_in = sv[1];
81 *fd_out = sv[1];
82 return 0;