5ca807842f
Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
#include "cache.h"
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#include "exec_cmd.h"
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#include "pkt-line.h"
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#include "sideband.h"
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#include <sys/wait.h>
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static pid_t setup_sideband(int sideband, const char *me, int fd[2], int xd[2])
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{
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pid_t side_pid;
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if (!sideband) {
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fd[0] = xd[0];
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fd[1] = xd[1];
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return 0;
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}
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/* xd[] is talking with upload-pack; subprocess reads from
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* xd[0], spits out band#2 to stderr, and feeds us band#1
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* through our fd[0].
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*/
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if (pipe(fd) < 0)
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die("%s: unable to set up pipe", me);
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side_pid = fork();
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if (side_pid < 0)
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die("%s: unable to fork off sideband demultiplexer", me);
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if (!side_pid) {
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/* subprocess */
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close(fd[0]);
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if (xd[0] != xd[1])
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close(xd[1]);
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if (recv_sideband(me, xd[0], fd[1], 2))
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exit(1);
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exit(0);
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}
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close(xd[0]);
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close(fd[1]);
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fd[1] = xd[1];
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return side_pid;
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}
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static int get_pack(int xd[2], const char *me, int sideband, const char **argv)
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{
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int status;
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pid_t pid, side_pid;
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int fd[2];
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side_pid = setup_sideband(sideband, me, fd, xd);
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pid = fork();
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if (pid < 0)
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die("%s: unable to fork off %s", me, argv[0]);
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if (!pid) {
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dup2(fd[0], 0);
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close(fd[0]);
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close(fd[1]);
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execv_git_cmd(argv);
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die("%s exec failed", argv[0]);
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}
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close(fd[0]);
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close(fd[1]);
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while (waitpid(pid, &status, 0) < 0) {
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if (errno != EINTR)
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die("waiting for %s: %s", argv[0], strerror(errno));
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}
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if (WIFEXITED(status)) {
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int code = WEXITSTATUS(status);
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if (code)
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die("%s died with error code %d", argv[0], code);
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return 0;
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}
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if (WIFSIGNALED(status)) {
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int sig = WTERMSIG(status);
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die("%s died of signal %d", argv[0], sig);
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}
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die("%s died of unnatural causes %d", argv[0], status);
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}
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int receive_unpack_pack(int xd[2], const char *me, int quiet, int sideband)
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{
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const char *argv[3] = { "unpack-objects", quiet ? "-q" : NULL, NULL };
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return get_pack(xd, me, sideband, argv);
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}
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int receive_keep_pack(int xd[2], const char *me, int quiet, int sideband)
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{
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const char *argv[5] = { "index-pack", "--stdin", "--fix-thin",
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quiet ? NULL : "-v", NULL };
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return get_pack(xd, me, sideband, argv);
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}
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