format-patch: refactor get_patch_filename

diff --git a/builtin/upload-archive.c b/builtin/upload-archive.c
index 2d0b38333eadef0a5c6501e5a3046ebc2afa048e..b928beb8ed51c9af9aa4f640e80443a5e059d505 100644 (file)
--- a/builtin/upload-archive.c
+++ b/builtin/upload-archive.c
@@ -6,6 +6,7 @@
 #include "archive.h"
 #include "pkt-line.h"
 #include "sideband.h"
+#include "run-command.h"
 
 static const char upload_archive_usage[] =
        "git upload-archive <repo>";
@@ -13,12 +14,9 @@ static const char upload_archive_usage[] =
 static const char deadchild[] =
 "git upload-archive: archiver died with error";
 
-static const char lostchild[] =
-"git upload-archive: archiver process was lost";
-
 #define MAX_ARGS (64)
 
-static int run_upload_archive(int argc, const char **argv, const char *prefix)
+int cmd_upload_archive_writer(int argc, const char **argv, const char *prefix)
 {
        const char *sent_argv[MAX_ARGS];
        const char *arg_cmd = "argument ";
@@ -96,8 +94,8 @@ static ssize_t process_input(int child_fd, int band)
 
 int cmd_upload_archive(int argc, const char **argv, const char *prefix)
 {
-       pid_t writer;
-       int fd1[2], fd2[2];
+       struct child_process writer = { argv };
+
        /*
         * Set up sideband subprocess.
         *
@@ -105,39 +103,24 @@ int cmd_upload_archive(int argc, const char **argv, const char *prefix)
         * multiplexed out to our fd#1.  If the child dies, we tell the other
         * end over channel #3.
         */
-       if (pipe(fd1) < 0 || pipe(fd2) < 0) {
-               int err = errno;
-               packet_write(1, "NACK pipe failed on the remote side\n");
-               die("upload-archive: %s", strerror(err));
-       }
-       writer = fork();
-       if (writer < 0) {
+       argv[0] = "upload-archive--writer";
+       writer.out = writer.err = -1;
+       writer.git_cmd = 1;
+       if (start_command(&writer)) {
                int err = errno;
-               packet_write(1, "NACK fork failed on the remote side\n");
+               packet_write(1, "NACK unable to spawn subprocess\n");
                die("upload-archive: %s", strerror(err));
        }
-       if (!writer) {
-               /* child - connect fd#1 and fd#2 to the pipe */
-               dup2(fd1[1], 1);
-               dup2(fd2[1], 2);
-               close(fd1[1]); close(fd2[1]);
-               close(fd1[0]); close(fd2[0]); /* we do not read from pipe */
-
-               exit(run_upload_archive(argc, argv, prefix));
-       }
 
-       /* parent - read from child, multiplex and send out to fd#1 */
-       close(fd1[1]); close(fd2[1]); /* we do not write to pipe */
        packet_write(1, "ACK\n");
        packet_flush(1);
 
        while (1) {
                struct pollfd pfd[2];
-               int status;
 
-               pfd[0].fd = fd1[0];
+               pfd[0].fd = writer.out;
                pfd[0].events = POLLIN;
-               pfd[1].fd = fd2[0];
+               pfd[1].fd = writer.err;
                pfd[1].events = POLLIN;
                if (poll(pfd, 2, -1) < 0) {
                        if (errno != EINTR) {
@@ -156,9 +139,7 @@ int cmd_upload_archive(int argc, const char **argv, const char *prefix)
                        if (process_input(pfd[0].fd, 1))
                                continue;
 
-               if (waitpid(writer, &status, 0) < 0)
-                       error_clnt("%s", lostchild);
-               else if (!WIFEXITED(status) || WEXITSTATUS(status) > 0)
+               if (finish_command(&writer))
                        error_clnt("%s", deadchild);
                packet_flush(1);
                break;