| 1 | /* |
| 2 | * Copyright (c) 2006 Franck Bui-Huu |
| 3 | */ |
| 4 | #define USE_THE_REPOSITORY_VARIABLE |
| 5 | #include "builtin.h" |
| 6 | #include "archive.h" |
| 7 | #include "pkt-line.h" |
| 8 | #include "setup.h" |
| 9 | #include "sideband.h" |
| 10 | #include "run-command.h" |
| 11 | #include "strvec.h" |
| 12 | |
| 13 | static const char upload_archive_usage[] = |
| 14 | "git upload-archive <repository>"; |
| 15 | |
| 16 | static const char deadchild[] = |
| 17 | "git upload-archive: archiver died with error"; |
| 18 | |
| 19 | #define MAX_ARGS (64) |
| 20 | |
| 21 | int cmd_upload_archive_writer(int argc, |
| 22 | const char **argv, |
| 23 | const char *prefix, |
| 24 | struct repository *repo UNUSED) |
| 25 | { |
| 26 | struct strvec sent_argv = STRVEC_INIT; |
| 27 | const char *arg_cmd = "argument "; |
| 28 | int ret; |
| 29 | |
| 30 | show_usage_if_asked(argc, argv, upload_archive_usage); |
| 31 | if (argc != 2) |
| 32 | usage(upload_archive_usage); |
| 33 | |
| 34 | if (!enter_repo(the_repository, argv[1], 0)) |
| 35 | die("'%s' does not appear to be a git repository", argv[1]); |
| 36 | |
| 37 | init_archivers(); |
| 38 | |
| 39 | /* put received options in sent_argv[] */ |
| 40 | strvec_push(&sent_argv, "git-upload-archive"); |
| 41 | for (;;) { |
| 42 | char *buf = packet_read_line(0, NULL); |
| 43 | if (!buf) |
| 44 | break; /* got a flush */ |
| 45 | if (sent_argv.nr > MAX_ARGS) |
| 46 | die("Too many options (>%d)", MAX_ARGS - 1); |
| 47 | |
| 48 | if (!starts_with(buf, arg_cmd)) |
| 49 | die("'argument' token or flush expected"); |
| 50 | strvec_push(&sent_argv, buf + strlen(arg_cmd)); |
| 51 | } |
| 52 | |
| 53 | /* parse all options sent by the client */ |
| 54 | ret = write_archive(sent_argv.nr, sent_argv.v, prefix, |
| 55 | the_repository, NULL, 1); |
| 56 | |
| 57 | strvec_clear(&sent_argv); |
| 58 | return ret; |
| 59 | } |
| 60 | |
| 61 | __attribute__((format (printf, 1, 2))) |
| 62 | static void error_clnt(const char *fmt, ...) |
| 63 | { |
| 64 | struct strbuf buf = STRBUF_INIT; |
| 65 | va_list params; |
| 66 | |
| 67 | va_start(params, fmt); |
| 68 | strbuf_vaddf(&buf, fmt, params); |
| 69 | va_end(params); |
| 70 | send_sideband(1, 3, buf.buf, buf.len, LARGE_PACKET_MAX); |
| 71 | die("sent error to the client: %s", buf.buf); |
| 72 | } |
| 73 | |
| 74 | static ssize_t process_input(int child_fd, int band) |
| 75 | { |
| 76 | char buf[16384]; |
| 77 | ssize_t sz = read(child_fd, buf, sizeof(buf)); |
| 78 | if (sz < 0) { |
| 79 | if (errno != EAGAIN && errno != EINTR) |
| 80 | error_clnt("read error: %s\n", strerror(errno)); |
| 81 | return sz; |
| 82 | } |
| 83 | send_sideband(1, band, buf, sz, LARGE_PACKET_MAX); |
| 84 | return sz; |
| 85 | } |
| 86 | |
| 87 | int cmd_upload_archive(int argc, |
| 88 | const char **argv, |
| 89 | const char *prefix, |
| 90 | struct repository *repo UNUSED) |
| 91 | { |
| 92 | struct child_process writer = CHILD_PROCESS_INIT; |
| 93 | |
| 94 | BUG_ON_NON_EMPTY_PREFIX(prefix); |
| 95 | |
| 96 | show_usage_if_asked(argc, argv, upload_archive_usage); |
| 97 | |
| 98 | /* |
| 99 | * Set up sideband subprocess. |
| 100 | * |
| 101 | * We (parent) monitor and read from child, sending its fd#1 and fd#2 |
| 102 | * multiplexed out to our fd#1. If the child dies, we tell the other |
| 103 | * end over channel #3. |
| 104 | */ |
| 105 | writer.out = writer.err = -1; |
| 106 | writer.git_cmd = 1; |
| 107 | strvec_push(&writer.args, "upload-archive--writer"); |
| 108 | strvec_pushv(&writer.args, argv + 1); |
| 109 | if (start_command(&writer)) { |
| 110 | int err = errno; |
| 111 | packet_write_fmt(1, "NACK unable to spawn subprocess\n"); |
| 112 | die("upload-archive: %s", strerror(err)); |
| 113 | } |
| 114 | |
| 115 | packet_write_fmt(1, "ACK\n"); |
| 116 | packet_flush(1); |
| 117 | |
| 118 | while (1) { |
| 119 | struct pollfd pfd[2]; |
| 120 | |
| 121 | pfd[0].fd = writer.out; |
| 122 | pfd[0].events = POLLIN; |
| 123 | pfd[1].fd = writer.err; |
| 124 | pfd[1].events = POLLIN; |
| 125 | if (poll(pfd, 2, -1) < 0) { |
| 126 | if (errno != EINTR) { |
| 127 | error_errno("poll failed resuming"); |
| 128 | sleep(1); |
| 129 | } |
| 130 | continue; |
| 131 | } |
| 132 | if (pfd[1].revents & POLLIN) |
| 133 | /* Status stream ready */ |
| 134 | if (process_input(pfd[1].fd, 2)) |
| 135 | continue; |
| 136 | if (pfd[0].revents & POLLIN) |
| 137 | /* Data stream ready */ |
| 138 | if (process_input(pfd[0].fd, 1)) |
| 139 | continue; |
| 140 | |
| 141 | if (finish_command(&writer)) |
| 142 | error_clnt("%s", deadchild); |
| 143 | packet_flush(1); |
| 144 | break; |
| 145 | } |
| 146 | return 0; |
| 147 | } |