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Commit | Line | Data |
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39345a21 FBH |
1 | /* |
2 | * Copyright (c) 2006 Franck Bui-Huu | |
3 | */ | |
39345a21 FBH |
4 | #include "cache.h" |
5 | #include "builtin.h" | |
6 | #include "archive.h" | |
7 | #include "pkt-line.h" | |
23d6d112 | 8 | #include "sideband.h" |
39345a21 FBH |
9 | |
10 | static const char upload_archive_usage[] = | |
1b1dd23f | 11 | "git upload-archive <repo>"; |
39345a21 | 12 | |
23d6d112 | 13 | static const char deadchild[] = |
1b1dd23f | 14 | "git upload-archive: archiver died with error"; |
39345a21 | 15 | |
d3788e19 | 16 | static const char lostchild[] = |
1b1dd23f | 17 | "git upload-archive: archiver process was lost"; |
d3788e19 | 18 | |
7f4d0511 | 19 | #define MAX_ARGS (64) |
23d6d112 JH |
20 | |
21 | static int run_upload_archive(int argc, const char **argv, const char *prefix) | |
39345a21 | 22 | { |
39345a21 FBH |
23 | const char *sent_argv[MAX_ARGS]; |
24 | const char *arg_cmd = "argument "; | |
25 | char *p, buf[4096]; | |
39345a21 FBH |
26 | int sent_argc; |
27 | int len; | |
28 | ||
29 | if (argc != 2) | |
30 | usage(upload_archive_usage); | |
31 | ||
74d817cf | 32 | if (strlen(argv[1]) + 1 > sizeof(buf)) |
39345a21 FBH |
33 | die("insanely long repository name"); |
34 | ||
35 | strcpy(buf, argv[1]); /* enter-repo smudges its argument */ | |
36 | ||
37 | if (!enter_repo(buf, 0)) | |
38 | die("not a git archive"); | |
39 | ||
40 | /* put received options in sent_argv[] */ | |
41 | sent_argc = 1; | |
42 | sent_argv[0] = "git-upload-archive"; | |
43 | for (p = buf;;) { | |
44 | /* This will die if not enough free space in buf */ | |
45 | len = packet_read_line(0, p, (buf + sizeof buf) - p); | |
46 | if (len == 0) | |
47 | break; /* got a flush */ | |
48 | if (sent_argc > MAX_ARGS - 2) | |
7f4d0511 | 49 | die("Too many options (>%d)", MAX_ARGS - 2); |
39345a21 FBH |
50 | |
51 | if (p[len-1] == '\n') { | |
52 | p[--len] = 0; | |
53 | } | |
54 | if (len < strlen(arg_cmd) || | |
55 | strncmp(arg_cmd, p, strlen(arg_cmd))) | |
56 | die("'argument' token or flush expected"); | |
57 | ||
58 | len -= strlen(arg_cmd); | |
59 | memmove(p, p + strlen(arg_cmd), len); | |
60 | sent_argv[sent_argc++] = p; | |
61 | p += len; | |
62 | *p++ = 0; | |
63 | } | |
64 | sent_argv[sent_argc] = NULL; | |
65 | ||
66 | /* parse all options sent by the client */ | |
6e94e683 | 67 | return write_archive(sent_argc, sent_argv, prefix, 0); |
23d6d112 JH |
68 | } |
69 | ||
d3788e19 JH |
70 | static void error_clnt(const char *fmt, ...) |
71 | { | |
72 | char buf[1024]; | |
73 | va_list params; | |
74 | int len; | |
75 | ||
76 | va_start(params, fmt); | |
77 | len = vsprintf(buf, fmt, params); | |
78 | va_end(params); | |
79 | send_sideband(1, 3, buf, len, LARGE_PACKET_MAX); | |
80 | die("sent error to the client: %s", buf); | |
81 | } | |
82 | ||
83 | static void process_input(int child_fd, int band) | |
84 | { | |
85 | char buf[16384]; | |
86 | ssize_t sz = read(child_fd, buf, sizeof(buf)); | |
87 | if (sz < 0) { | |
93d26e4c | 88 | if (errno != EAGAIN && errno != EINTR) |
d3788e19 JH |
89 | error_clnt("read error: %s\n", strerror(errno)); |
90 | return; | |
91 | } | |
92 | send_sideband(1, band, buf, sz, LARGE_PACKET_MAX); | |
93 | } | |
94 | ||
23d6d112 JH |
95 | int cmd_upload_archive(int argc, const char **argv, const char *prefix) |
96 | { | |
97 | pid_t writer; | |
98 | int fd1[2], fd2[2]; | |
99 | /* | |
100 | * Set up sideband subprocess. | |
101 | * | |
102 | * We (parent) monitor and read from child, sending its fd#1 and fd#2 | |
103 | * multiplexed out to our fd#1. If the child dies, we tell the other | |
104 | * end over channel #3. | |
105 | */ | |
106 | if (pipe(fd1) < 0 || pipe(fd2) < 0) { | |
107 | int err = errno; | |
108 | packet_write(1, "NACK pipe failed on the remote side\n"); | |
109 | die("upload-archive: %s", strerror(err)); | |
110 | } | |
111 | writer = fork(); | |
112 | if (writer < 0) { | |
113 | int err = errno; | |
114 | packet_write(1, "NACK fork failed on the remote side\n"); | |
115 | die("upload-archive: %s", strerror(err)); | |
116 | } | |
117 | if (!writer) { | |
118 | /* child - connect fd#1 and fd#2 to the pipe */ | |
119 | dup2(fd1[1], 1); | |
120 | dup2(fd2[1], 2); | |
121 | close(fd1[1]); close(fd2[1]); | |
122 | close(fd1[0]); close(fd2[0]); /* we do not read from pipe */ | |
123 | ||
124 | exit(run_upload_archive(argc, argv, prefix)); | |
125 | } | |
126 | ||
127 | /* parent - read from child, multiplex and send out to fd#1 */ | |
128 | close(fd1[1]); close(fd2[1]); /* we do not write to pipe */ | |
39345a21 FBH |
129 | packet_write(1, "ACK\n"); |
130 | packet_flush(1); | |
131 | ||
23d6d112 JH |
132 | while (1) { |
133 | struct pollfd pfd[2]; | |
23d6d112 JH |
134 | int status; |
135 | ||
136 | pfd[0].fd = fd1[0]; | |
137 | pfd[0].events = POLLIN; | |
138 | pfd[1].fd = fd2[0]; | |
139 | pfd[1].events = POLLIN; | |
140 | if (poll(pfd, 2, -1) < 0) { | |
141 | if (errno != EINTR) { | |
142 | error("poll failed resuming: %s", | |
143 | strerror(errno)); | |
144 | sleep(1); | |
145 | } | |
146 | continue; | |
147 | } | |
d3788e19 | 148 | if (pfd[0].revents & POLLIN) |
23d6d112 | 149 | /* Data stream ready */ |
d3788e19 JH |
150 | process_input(pfd[0].fd, 1); |
151 | if (pfd[1].revents & POLLIN) | |
23d6d112 | 152 | /* Status stream ready */ |
d3788e19 | 153 | process_input(pfd[1].fd, 2); |
9c95fbf9 FBH |
154 | /* Always finish to read data when available */ |
155 | if ((pfd[0].revents | pfd[1].revents) & POLLIN) | |
23d6d112 | 156 | continue; |
d3788e19 JH |
157 | |
158 | if (waitpid(writer, &status, 0) < 0) | |
159 | error_clnt("%s", lostchild); | |
160 | else if (!WIFEXITED(status) || WEXITSTATUS(status) > 0) | |
161 | error_clnt("%s", deadchild); | |
23d6d112 JH |
162 | packet_flush(1); |
163 | break; | |
164 | } | |
165 | return 0; | |
166 | } |