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7a33bcbe80
* sq_quote_buf is made public, and works on a strbuf. * sq_quote_argv also works on a strbuf. * make sq_quote_argv take a "maxlen" argument to check the buffer won't grow too big. Signed-off-by: Pierre Habouzit <madcoder@debian.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
79 lines
1.5 KiB
C
79 lines
1.5 KiB
C
#include "cache.h"
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#include "rsh.h"
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#include "quote.h"
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#define COMMAND_SIZE 4096
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int setup_connection(int *fd_in, int *fd_out, const char *remote_prog,
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char *url, int rmt_argc, char **rmt_argv)
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{
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char *host;
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char *path;
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int sv[2];
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int i;
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pid_t pid;
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struct strbuf cmd;
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if (!strcmp(url, "-")) {
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*fd_in = 0;
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*fd_out = 1;
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return 0;
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}
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host = strstr(url, "//");
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if (host) {
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host += 2;
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path = strchr(host, '/');
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} else {
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host = url;
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path = strchr(host, ':');
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if (path)
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*(path++) = '\0';
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}
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if (!path) {
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return error("Bad URL: %s", url);
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}
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/* $GIT_RSH <host> "env GIT_DIR=<path> <remote_prog> <args...>" */
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strbuf_init(&cmd, COMMAND_SIZE);
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strbuf_addstr(&cmd, "env ");
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strbuf_addstr(&cmd, GIT_DIR_ENVIRONMENT "=");
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sq_quote_buf(&cmd, path);
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strbuf_addch(&cmd, ' ');
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sq_quote_buf(&cmd, remote_prog);
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for (i = 0 ; i < rmt_argc ; i++) {
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strbuf_addch(&cmd, ' ');
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sq_quote_buf(&cmd, rmt_argv[i]);
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}
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strbuf_addstr(&cmd, " -");
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if (cmd.len >= COMMAND_SIZE)
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return error("Command line too long");
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if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv))
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return error("Couldn't create socket");
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pid = fork();
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if (pid < 0)
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return error("Couldn't fork");
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if (!pid) {
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const char *ssh, *ssh_basename;
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ssh = getenv("GIT_SSH");
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if (!ssh) ssh = "ssh";
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ssh_basename = strrchr(ssh, '/');
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if (!ssh_basename)
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ssh_basename = ssh;
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else
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ssh_basename++;
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close(sv[1]);
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dup2(sv[0], 0);
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dup2(sv[0], 1);
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execlp(ssh, ssh_basename, host, cmd.buf, NULL);
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}
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close(sv[0]);
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*fd_in = sv[1];
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*fd_out = sv[1];
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return 0;
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}
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