We run the sideband demultiplexer in an asynchronous function.
Note that earlier there was a check in the child process that closed
xd[1] only if it was different from xd[0]; this test is no longer needed
because git_connect() always returns two different file descriptors
(see ec587fde0a76780931c7ac32474c8c000aa45134).
Signed-off-by: Johannes Sixt <johannes.sixt@xxxxxxxxxx>
---
builtin-fetch-pack.c | 39 ++++++++++++++++++---------------------
1 files changed, 18 insertions(+), 21 deletions(-)
diff --git a/builtin-fetch-pack.c b/builtin-fetch-pack.c
index 871b704..51d8a32 100644
--- a/builtin-fetch-pack.c
+++ b/builtin-fetch-pack.c
@@ -457,42 +457,37 @@ static int everything_local(struct ref **refs, int nr_match, char **match)
return retval;
}
-static pid_t setup_sideband(int fd[2], int xd[2])
+static int sideband_demux(int fd, void *data)
{
- pid_t side_pid;
+ int *xd = data;
+ close(xd[1]);
+ return recv_sideband("fetch-pack", xd[0], fd, 2);
+}
+
+static void setup_sideband(int fd[2], int xd[2], struct async *demux)
+{
if (!use_sideband) {
fd[0] = xd[0];
fd[1] = xd[1];
- return 0;
+ return;
}
/* xd[] is talking with upload-pack; subprocess reads from
* xd[0], spits out band#2 to stderr, and feeds us band#1
- * through our fd[0].
+ * through demux->out.
*/
- if (pipe(fd) < 0)
- die("fetch-pack: unable to set up pipe");
- side_pid = fork();
- if (side_pid < 0)
+ demux->proc = sideband_demux;
+ demux->data = xd;
+ if (start_async(demux))
die("fetch-pack: unable to fork off sideband demultiplexer");
- if (!side_pid) {
- /* subprocess */
- close(fd[0]);
- if (xd[0] != xd[1])
- close(xd[1]);
- if (recv_sideband("fetch-pack", xd[0], fd[1], 2))
- exit(1);
- exit(0);
- }
close(xd[0]);
- close(fd[1]);
+ fd[0] = demux->out;
fd[1] = xd[1];
- return side_pid;
}
static int get_pack(int xd[2], char **pack_lockfile)
{
- pid_t side_pid;
+ struct async demux;
int fd[2];
const char *argv[20];
char keep_arg[256];
@@ -501,7 +496,7 @@ static int get_pack(int xd[2], char **pack_lockfile)
int do_keep = args.keep_pack;
struct child_process cmd;
- side_pid = setup_sideband(fd, xd);
+ setup_sideband(fd, xd, &demux);
memset(&cmd, 0, sizeof(cmd));
cmd.argv = argv;
@@ -556,6 +551,8 @@ static int get_pack(int xd[2], char **pack_lockfile)
if (finish_command(&cmd))
die("%s failed", argv[0]);
+ if (use_sideband && finish_async(&demux))
+ die("error in sideband demultiplexer");
return 0;
}
--
1.5.3.4.315.g2ce38
-
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