summaryrefslogtreecommitdiff
path: root/connect.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@g5.osdl.org>2005-07-04 18:57:58 (GMT)
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-04 18:57:58 (GMT)
commitf71925983ddc365c167559ecc623f2c000607cda (patch)
tree4eaf19a0c2bd9a93d35c41b5afedf79ea2ce93f7 /connect.c
parenta61eea6abdbd336c7a3364c170cce3de01421599 (diff)
downloadgit-f71925983ddc365c167559ecc623f2c000607cda.zip
git-f71925983ddc365c167559ecc623f2c000607cda.tar.gz
git-f71925983ddc365c167559ecc623f2c000607cda.tar.bz2
Factor out the ssh connection stuff from send-pack.c
I want to use it for git-fetch-pack too.
Diffstat (limited to 'connect.c')
-rw-r--r--connect.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/connect.c b/connect.c
new file mode 100644
index 0000000..60b87f5
--- /dev/null
+++ b/connect.c
@@ -0,0 +1,86 @@
+#include "cache.h"
+#include <sys/wait.h>
+
+/*
+ * First, make it shell-safe. We do this by just disallowing any
+ * special characters. Somebody who cares can do escaping and let
+ * through the rest. But since we're doing to feed this to ssh as
+ * a command line, we're going to be pretty damn anal for now.
+ */
+static char *shell_safe(char *url)
+{
+ char *n = url;
+ unsigned char c;
+ static const char flags[256] = {
+ ['0'...'9'] = 1,
+ ['a'...'z'] = 1,
+ ['A'...'Z'] = 1,
+ ['.'] = 1, ['/'] = 1,
+ ['-'] = 1, ['+'] = 1,
+ [':'] = 1
+ };
+
+ while ((c = *n++) != 0) {
+ if (flags[c] != 1)
+ die("I don't like '%c'. Sue me.", c);
+ }
+ return url;
+}
+
+/*
+ * Yeah, yeah, fixme. Need to pass in the heads etc.
+ */
+int git_connect(int fd[2], char *url, const char *prog)
+{
+ char command[1024];
+ const char *host, *path;
+ char *colon;
+ int pipefd[2][2];
+ pid_t pid;
+
+ url = shell_safe(url);
+ host = NULL;
+ path = url;
+ colon = strchr(url, ':');
+ if (colon) {
+ *colon = 0;
+ host = url;
+ path = colon+1;
+ }
+ snprintf(command, sizeof(command), "%s %s", prog, path);
+ if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
+ die("unable to create pipe pair for communication");
+ pid = fork();
+ if (!pid) {
+ dup2(pipefd[1][0], 0);
+ dup2(pipefd[0][1], 1);
+ close(pipefd[0][0]);
+ close(pipefd[0][1]);
+ close(pipefd[1][0]);
+ close(pipefd[1][1]);
+ if (host)
+ execlp("ssh", "ssh", host, command, NULL);
+ else
+ execlp("sh", "sh", "-c", command, NULL);
+ die("exec failed");
+ }
+ fd[0] = pipefd[0][0];
+ fd[1] = pipefd[1][1];
+ close(pipefd[0][1]);
+ close(pipefd[1][0]);
+ return pid;
+}
+
+int finish_connect(pid_t pid)
+{
+ int ret;
+
+ for (;;) {
+ ret = waitpid(pid, NULL, 0);
+ if (!ret)
+ break;
+ if (errno != EINTR)
+ break;
+ }
+ return ret;
+}