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authorJunio C Hamano <gitster@pobox.com>2007-11-01 13:47:47 -0700
committerJunio C Hamano <gitster@pobox.com>2007-11-01 13:47:47 -0700
commit4340a813d007b592534de664d152d66417dbe809 (patch)
tree731be77f39c37cd0c6b1ddf5bf8e50f1692ae9e7 /builtin-fetch-pack.c
parent6959893b0b65ebc68ce2fb524a8ec15a26ca4972 (diff)
parent546bb5823249678bc6ad11e65661d896ed83448a (diff)
downloadgit-4340a813d007b592534de664d152d66417dbe809.tar.gz
Merge branch 'js/forkexec'
* js/forkexec: Use the asyncronous function infrastructure to run the content filter. Avoid a dup2(2) in apply_filter() - start_command() can do it for us. t0021-conversion.sh: Test that the clean filter really cleans content. upload-pack: Run rev-list in an asynchronous function. upload-pack: Move the revision walker into a separate function. Use the asyncronous function infrastructure in builtin-fetch-pack.c. Add infrastructure to run a function asynchronously. upload-pack: Use start_command() to run pack-objects in create_pack_file(). Have start_command() create a pipe to read the stderr of the child. Use start_comand() in builtin-fetch-pack.c instead of explicit fork/exec. Use run_command() to spawn external diff programs instead of fork/exec. Use start_command() to run content filters instead of explicit fork/exec. Use start_command() in git_connect() instead of explicit fork/exec. Change git_connect() to return a struct child_process instead of a pid_t. Conflicts: builtin-fetch-pack.c
Diffstat (limited to 'builtin-fetch-pack.c')
-rw-r--r--builtin-fetch-pack.c101
1 files changed, 36 insertions, 65 deletions
diff --git a/builtin-fetch-pack.c b/builtin-fetch-pack.c
index 8753840a82..862652be92 100644
--- a/builtin-fetch-pack.c
+++ b/builtin-fetch-pack.c
@@ -7,6 +7,7 @@
#include "pack.h"
#include "sideband.h"
#include "fetch-pack.h"
+#include "run-command.h"
static int transfer_unpack_limit = -1;
static int fetch_unpack_limit = -1;
@@ -457,53 +458,49 @@ 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)
{
- int status;
- pid_t pid, side_pid;
+ struct async demux;
int fd[2];
const char *argv[20];
char keep_arg[256];
char hdr_arg[256];
const char **av;
int do_keep = args.keep_pack;
- int keep_pipe[2];
+ struct child_process cmd;
- side_pid = setup_sideband(fd, xd);
+ setup_sideband(fd, xd, &demux);
+ memset(&cmd, 0, sizeof(cmd));
+ cmd.argv = argv;
av = argv;
*hdr_arg = 0;
if (!args.keep_pack && unpack_limit) {
@@ -520,8 +517,8 @@ static int get_pack(int xd[2], char **pack_lockfile)
}
if (do_keep) {
- if (pack_lockfile && pipe(keep_pipe))
- die("fetch-pack: pipe setup failure: %s", strerror(errno));
+ if (pack_lockfile)
+ cmd.out = -1;
*av++ = "index-pack";
*av++ = "--stdin";
if (!args.quiet && !args.no_progress)
@@ -545,43 +542,19 @@ static int get_pack(int xd[2], char **pack_lockfile)
*av++ = hdr_arg;
*av++ = NULL;
- pid = fork();
- if (pid < 0)
+ cmd.in = fd[0];
+ cmd.git_cmd = 1;
+ if (start_command(&cmd))
die("fetch-pack: unable to fork off %s", argv[0]);
- if (!pid) {
- dup2(fd[0], 0);
- if (do_keep && pack_lockfile) {
- dup2(keep_pipe[1], 1);
- close(keep_pipe[0]);
- close(keep_pipe[1]);
- }
- close(fd[0]);
- close(fd[1]);
- execv_git_cmd(argv);
- die("%s exec failed", argv[0]);
- }
- close(fd[0]);
close(fd[1]);
- if (do_keep && pack_lockfile) {
- close(keep_pipe[1]);
- *pack_lockfile = index_pack_lockfile(keep_pipe[0]);
- close(keep_pipe[0]);
- }
- while (waitpid(pid, &status, 0) < 0) {
- if (errno != EINTR)
- die("waiting for %s: %s", argv[0], strerror(errno));
- }
- if (WIFEXITED(status)) {
- int code = WEXITSTATUS(status);
- if (code)
- die("%s died with error code %d", argv[0], code);
- return 0;
- }
- if (WIFSIGNALED(status)) {
- int sig = WTERMSIG(status);
- die("%s died of signal %d", argv[0], sig);
- }
- die("%s died of unnatural causes %d", argv[0], status);
+ if (do_keep && pack_lockfile)
+ *pack_lockfile = index_pack_lockfile(cmd.out);
+
+ if (finish_command(&cmd))
+ die("%s failed", argv[0]);
+ if (use_sideband && finish_async(&demux))
+ die("error in sideband demultiplexer");
+ return 0;
}
static struct ref *do_fetch_pack(int fd[2],
@@ -763,7 +736,7 @@ struct ref *fetch_pack(struct fetch_pack_args *my_args,
{
int i, ret;
int fd[2];
- pid_t pid;
+ struct child_process *conn;
struct ref *ref;
struct stat st;
@@ -774,16 +747,14 @@ struct ref *fetch_pack(struct fetch_pack_args *my_args,
st.st_mtime = 0;
}
- pid = git_connect(fd, (char *)dest, args.uploadpack,
+ conn = git_connect(fd, (char *)dest, args.uploadpack,
args.verbose ? CONNECT_VERBOSE : 0);
- if (pid < 0)
- return NULL;
if (heads && nr_heads)
nr_heads = remove_duplicates(nr_heads, heads);
ref = do_fetch_pack(fd, nr_heads, heads, pack_lockfile);
close(fd[0]);
close(fd[1]);
- ret = finish_connect(pid);
+ ret = finish_connect(conn);
if (!ret && nr_heads) {
/* If the heads to pull were given, we should have