diff options
Diffstat (limited to 'fetch-clone.c')
| -rw-r--r-- | fetch-clone.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/fetch-clone.c b/fetch-clone.c new file mode 100644 index 0000000000..2b2aa15ea7 --- /dev/null +++ b/fetch-clone.c @@ -0,0 +1,172 @@ +#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); +} |