65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
#include "rsh.h"
|
|
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
|
|
#include "cache.h"
|
|
|
|
#define COMMAND_SIZE 4096
|
|
|
|
int setup_connection(int *fd_in, int *fd_out, char *remote_prog,
|
|
char *url, int rmt_argc, char **rmt_argv)
|
|
{
|
|
char *host;
|
|
char *path;
|
|
int sv[2];
|
|
char command[COMMAND_SIZE];
|
|
char *posn;
|
|
int i;
|
|
|
|
if (!strcmp(url, "-")) {
|
|
*fd_in = 0;
|
|
*fd_out = 1;
|
|
return 0;
|
|
}
|
|
|
|
host = strstr(url, "//");
|
|
if (!host) {
|
|
return error("Bad URL: %s", url);
|
|
}
|
|
host += 2;
|
|
path = strchr(host, '/');
|
|
if (!path) {
|
|
return error("Bad URL: %s", url);
|
|
}
|
|
*(path++) = '\0';
|
|
/* ssh <host> 'cd /<path>; stdio-pull <arg...> <commit-id>' */
|
|
snprintf(command, COMMAND_SIZE,
|
|
"cd /%s; SHA1_FILE_DIRECTORY=objects %s",
|
|
path, remote_prog);
|
|
posn = command + strlen(command);
|
|
for (i = 0; i < rmt_argc; i++) {
|
|
*(posn++) = ' ';
|
|
strncpy(posn, rmt_argv[i], COMMAND_SIZE - (posn - command));
|
|
posn += strlen(rmt_argv[i]);
|
|
if (posn - command + 4 >= COMMAND_SIZE) {
|
|
return error("Command line too long");
|
|
}
|
|
}
|
|
strcpy(posn, " -");
|
|
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv)) {
|
|
return error("Couldn't create socket");
|
|
}
|
|
if (!fork()) {
|
|
close(sv[1]);
|
|
dup2(sv[0], 0);
|
|
dup2(sv[0], 1);
|
|
execlp("ssh", "ssh", host, command, NULL);
|
|
}
|
|
close(sv[0]);
|
|
*fd_in = sv[1];
|
|
*fd_out = sv[1];
|
|
return 0;
|
|
}
|