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#include "cache.h"
#include <sys/wait.h>
static int finish_pack(const char *pack_tmp_name, const char *me)
{
int pipe_fd[2];
pid_t pid;
char idx[PATH_MAX];
char final[PATH_MAX];
char hash[41];
unsigned char sha1[20];
char *cp;
int err = 0;
if (pipe(pipe_fd) < 0)
die("%s: unable to set up pipe", me);
strcpy(idx, pack_tmp_name); /* ".git/objects/pack-XXXXXX" */
cp = strrchr(idx, '/');
memcpy(cp, "/pidx", 5);
pid = fork();
if (pid < 0)
die("git-clone-pack: unable to fork off git-index-pack");
if (!pid) {
close(0);
dup2(pipe_fd[1], 1);
close(pipe_fd[0]);
close(pipe_fd[1]);
execlp("git-index-pack","git-index-pack",
"-o", idx, pack_tmp_name, NULL);
error("cannot exec git-index-pack <%s> <%s>",
idx, pack_tmp_name);
exit(1);
}
close(pipe_fd[1]);
if (read(pipe_fd[0], hash, 40) != 40) {
error("%s: unable to read from git-index-pack", me);
err = 1;
}
close(pipe_fd[0]);
for (;;) {
int status, code;
int retval = waitpid(pid, &status, 0);
if (retval < 0) {
if (errno == EINTR)
continue;
error("waitpid failed (%s)", strerror(retval));
goto error_die;
}
if (WIFSIGNALED(status)) {
int sig = WTERMSIG(status);
error("git-index-pack died of signal %d", sig);
goto error_die;
}
if (!WIFEXITED(status)) {
error("git-index-pack died of unnatural causes %d",
status);
goto error_die;
}
code = WEXITSTATUS(status);
if (code) {
error("git-index-pack died with error code %d", code);
goto error_die;
}
if (err)
goto error_die;
break;
}
hash[40] = 0;
if (get_sha1_hex(hash, sha1)) {
error("git-index-pack reported nonsense '%s'", hash);
goto error_die;
}
/* Now we have pack in pack_tmp_name[], and
* idx in idx[]; rename them to their final names.
*/
snprintf(final, sizeof(final),
"%s/pack/pack-%s.pack", get_object_directory(), hash);
move_temp_to_file(pack_tmp_name, final);
chmod(final, 0444);
snprintf(final, sizeof(final),
"%s/pack/pack-%s.idx", get_object_directory(), hash);
move_temp_to_file(idx, final);
chmod(final, 0444);
return 0;
error_die:
unlink(idx);
unlink(pack_tmp_name);
exit(1);
}
int receive_unpack_pack(int fd[2], const char *me, int quiet)
{
int status;
pid_t pid;
pid = fork();
if (pid < 0)
die("%s: unable to fork off git-unpack-objects", me);
if (!pid) {
dup2(fd[0], 0);
close(fd[0]);
close(fd[1]);
execlp("git-unpack-objects", "git-unpack-objects",
quiet ? "-q" : NULL, NULL);
die("git-unpack-objects exec failed");
}
close(fd[0]);
close(fd[1]);
while (waitpid(pid, &status, 0) < 0) {
if (errno != EINTR)
die("waiting for git-unpack-objects: %s",
strerror(errno));
}
if (WIFEXITED(status)) {
int code = WEXITSTATUS(status);
if (code)
die("git-unpack-objects died with error code %d",
code);
return 0;
}
if (WIFSIGNALED(status)) {
int sig = WTERMSIG(status);
die("git-unpack-objects died of signal %d", sig);
}
die("git-unpack-objects died of unnatural causes %d", status);
}
int receive_keep_pack(int fd[2], const char *me)
{
char tmpfile[PATH_MAX];
int ofd, ifd;
ifd = fd[0];
snprintf(tmpfile, sizeof(tmpfile),
"%s/pack/tmp-XXXXXX", get_object_directory());
ofd = mkstemp(tmpfile);
if (ofd < 0)
return error("unable to create temporary file %s", tmpfile);
while (1) {
char buf[8192];
ssize_t sz, wsz, pos;
sz = read(ifd, buf, sizeof(buf));
if (sz == 0)
break;
if (sz < 0) {
error("error reading pack (%s)", strerror(errno));
close(ofd);
unlink(tmpfile);
return -1;
}
pos = 0;
while (pos < sz) {
wsz = write(ofd, buf + pos, sz - pos);
if (wsz < 0) {
error("error writing pack (%s)",
strerror(errno));
close(ofd);
unlink(tmpfile);
return -1;
}
pos += wsz;
}
}
close(ofd);
return finish_pack(tmpfile, me);
}
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