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#ifndef COUNTERPART_ENV_NAME #define COUNTERPART_ENV_NAME "GIT_SSH_FETCH" #endif #ifndef COUNTERPART_PROGRAM_NAME #define COUNTERPART_PROGRAM_NAME "git-ssh-fetch" #endif #ifndef MY_PROGRAM_NAME #define MY_PROGRAM_NAME "git-ssh-upload" #endif #include "cache.h" #include "rsh.h" #include "refs.h" static unsigned char local_version = 1; static unsigned char remote_version; static int verbose; static int serve_object(int fd_in, int fd_out) { ssize_t size; unsigned char sha1[20]; signed char remote; size = read_in_full(fd_in, sha1, 20); if (size < 0) { perror("git-ssh-upload: read "); return -1; } if (!size) return -1; if (verbose) fprintf(stderr, "Serving %s\n", sha1_to_hex(sha1)); remote = 0; if (!has_sha1_file(sha1)) { fprintf(stderr, "git-ssh-upload: could not find %s\n", sha1_to_hex(sha1)); remote = -1; } if (write_in_full(fd_out, &remote, 1) != 1) return 0; if (remote < 0) return 0; return write_sha1_to_fd(fd_out, sha1); } static int serve_version(int fd_in, int fd_out) { if (xread(fd_in, &remote_version, 1) < 1) return -1; write_in_full(fd_out, &local_version, 1); return 0; } static int serve_ref(int fd_in, int fd_out) { char ref[PATH_MAX]; unsigned char sha1[20]; int posn = 0; signed char remote = 0; do { if (posn >= PATH_MAX || xread(fd_in, ref + posn, 1) < 1) return -1; posn++; } while (ref[posn - 1]); if (verbose) fprintf(stderr, "Serving %s\n", ref); if (get_ref_sha1(ref, sha1)) remote = -1; if (write_in_full(fd_out, &remote, 1) != 1) return 0; if (remote) return 0; write_in_full(fd_out, sha1, 20); return 0; } static void service(int fd_in, int fd_out) { char type; int retval; do { retval = xread(fd_in, &type, 1); if (retval < 1) { if (retval < 0) perror("git-ssh-upload: read "); return; } if (type == 'v' && serve_version(fd_in, fd_out)) return; if (type == 'o' && serve_object(fd_in, fd_out)) return; if (type == 'r' && serve_ref(fd_in, fd_out)) return; } while (1); } static const char ssh_push_usage[] = MY_PROGRAM_NAME " [-c] [-t] [-a] [-w ref] commit-id url"; int main(int argc, char **argv) { int arg = 1; char *commit_id; char *url; int fd_in, fd_out; const char *prog; unsigned char sha1[20]; char hex[41]; prog = getenv(COUNTERPART_ENV_NAME); if (!prog) prog = COUNTERPART_PROGRAM_NAME; setup_git_directory(); while (arg < argc && argv[arg][0] == '-') { if (argv[arg][1] == 'w') arg++; arg++; } if (argc < arg + 2) usage(ssh_push_usage); commit_id = argv[arg]; url = argv[arg + 1]; if (get_sha1(commit_id, sha1)) die("Not a valid object name %s", commit_id); memcpy(hex, sha1_to_hex(sha1), sizeof(hex)); argv[arg] = hex; if (setup_connection(&fd_in, &fd_out, prog, url, arg, argv + 1)) return 1; service(fd_in, fd_out); return 0; }
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