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[PATCH v7 6/9] connect: make parse_connect_url() return the user part of the url as a separate value

From
Mike Hommey <mh@glandium.org>
Date
May 21, 2016, 23:17 UTC
Message-ID
<20160521231732.4888-7-mh@glandium.org>
In-Reply-To
<20160521231732.4888-1-mh@glandium.org>
Signed-off-by: Mike Hommey <mh@glandium.org>
---
 connect.c | 51 ++++++++++++++++++++++++++++++++++-----------------
 1 file changed, 34 insertions(+), 17 deletions(-)
diff --git a/connect.c b/connect.c
index c0fad4f..48d9cd2 100644
--- a/connect.c
+++ b/connect.c
@@ -588,11 +588,13 @@ static char *get_port(char *host)
  * Extract protocol and relevant parts from the specified connection URL.
  * The caller must free() the returned strings.
  */
-static enum protocol parse_connect_url(const char *url_orig, char **ret_host,
-				       char **ret_port, char **ret_path)
+static enum protocol parse_connect_url(const char *url_orig, char **ret_user,
+				       char **ret_host, char **ret_port,
+				       char **ret_path)
 {
 	char *url;
 	char *host, *path;
+	const char *user = NULL;
 	const char *port = NULL;
 	char *end;
 	int separator = '/';
@@ -650,20 +652,27 @@ static enum protocol parse_connect_url(const char *url_orig, char **ret_host,
 
 	get_host_and_port(&host, &port);
 
-	if (*host && !port) {
-		/* get_host_and_port may not return a port even when there is
-		 * one: In the [host:port]:path case, get_host_and_port is
-		 * called with "[host:port]" and returns "host:port" and NULL.
-		 * In that specific case, we still need to split the port.
-		 * "host:port" may also look like "user@host:port". As the
-		 * `user` portion tends to be less strict than `host:port`,
-		 * we first put it out of the equation: since a hostname
-		 * cannot contain a '@', we start from the last '@' in the
-		 * string. */
+	if (*host) {
+		/* At this point, the host part may look like user@host:port.
+		 * As the `user` portion tends to be less strict than
+		 * `host:port`, we first put it out of the equation: since a
+		 * hostname cannot contain a '@', we start from the last '@'
+		 * in the string. */
 		char *end_user = strrchr(host, '@');
-		port = get_port(end_user ? end_user : host);
+		if (end_user) {
+			*end_user = '\0';
+			user = host;
+			host = end_user + 1;
+		}
 	}
+	/* get_host_and_port may not have returned a port even when there is
+	 * one: In the [host:port]:path case, get_host_and_port is called
+	 * with "[host:port]" and returns "host:port" and NULL.
+	 * In that specific case, we still need to split the port. */
+	if (!port)
+		port = get_port(host);
 
+	*ret_user = user ? xstrdup(user) : NULL;
 	*ret_host = xstrdup(host);
 	*ret_port = port ? xstrdup(port) : NULL;
 	*ret_path = path;
@@ -687,7 +696,7 @@ static struct child_process no_fork = CHILD_PROCESS_INIT;
 struct child_process *git_connect(int fd[2], const char *url,
 				  const char *prog, int flags)
 {
-	char *host, *port, *path;
+	char *user, *host, *port, *path;
 	struct child_process *conn = &no_fork;
 	enum protocol protocol;
 	struct strbuf cmd = STRBUF_INIT;
@@ -697,11 +706,14 @@ struct child_process *git_connect(int fd[2], const char *url,
 	 */
 	signal(SIGCHLD, SIG_DFL);
 
-	protocol = parse_connect_url(url, &host, &port, &path);
+	protocol = parse_connect_url(url, &user, &host, &port, &path);
 	if (flags & CONNECT_DIAG_URL) {
 		printf("Diag: url=%s\n", url ? url : "NULL");
 		printf("Diag: protocol=%s\n", prot_name(protocol));
-		printf("Diag: userandhost=%s\n", host ? host : "NULL");
+		if (user)
+			printf("Diag: userandhost=%s@%s\n", user, host);
+		else
+			printf("Diag: userandhost=%s\n", host ? host : "NULL");
 		printf("Diag: port=%s\n", port ? port : "NONE");
 		printf("Diag: path=%s\n", path ? path : "NULL");
 		conn = NULL;
@@ -810,7 +822,11 @@ struct child_process *git_connect(int fd[2], const char *url,
 				argv_array_push(&conn->args, putty ? "-P" : "-p");
 				argv_array_push(&conn->args, port);
 			}
-			argv_array_push(&conn->args, host);
+			if (user)
+				argv_array_pushf(&conn->args, "%s@%s",
+						 user, host);
+			else
+				argv_array_push(&conn->args, host);
 		} else {
 			transport_check_allowed("file");
 		}
@@ -823,6 +839,7 @@ struct child_process *git_connect(int fd[2], const char *url,
 		fd[1] = conn->in;  /* write to child's stdin */
 		strbuf_release(&cmd);
 	}
+	free(user);
 	free(host);
 	free(port);
 	free(path);
-- 
2.8.3.401.ga81c606.dirty
Previous: Mike HommeyNext: Mike Hommey
Message 16 of 19 in “connect: various cleanups”
  1. 0/9 connect: various cleanupsMike Hommey, May 21, 2016
  2. 1/9 connect: document why we sometimes call get_port after get_host_and_portMike Hommey, May 21, 2016
  3. Eric SunshineMay 22, 2016
  4. Torsten BögershausenMay 22, 2016
  5. Mike HommeyMay 22, 2016
  6. Torsten BögershausenMay 23, 2016
  7. Junio C HamanoMay 23, 2016
  8. Mike HommeyMay 23, 2016
  9. Torsten BögershausenMay 24, 2016
  10. Mike HommeyMay 25, 2016
  11. Torsten BögershausenMay 26, 2016
  12. 2/9 connect: call get_host_and_port() earlierMike Hommey, May 21, 2016
  13. 3/9 connect: re-derive a host:port string from the separate host and port variablesMike Hommey, May 21, 2016
  14. 4/9 connect: make parse_connect_url() return separated host and portMike Hommey, May 21, 2016
  15. 5/9 connect: group CONNECT_DIAG_URL handling codeMike Hommey, May 21, 2016
  16. 6/9 connect: make parse_connect_url() return the user part of the url as a separate valueMike Hommey, May 21, 2016
  17. 7/9 connect: change the --diag-url output to separate user and hostMike Hommey, May 21, 2016
  18. 8/9 connect: actively reject git:// urls with a user partMike Hommey, May 21, 2016
  19. 9/9 connect: move ssh command line preparation to a separate functionMike Hommey, May 21, 2016

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