The ninth batch
[git.git] / builtin / upload-archive.c
blob9e9343f1213be72942ddebe9fa691b97e7d3b3fa
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 "path.h"
8 #include "pkt-line.h"
9 #include "sideband.h"
10 #include "run-command.h"
11 #include "strvec.h"
13 static const char upload_archive_usage[] =
14 "git upload-archive <repository>";
16 static const char deadchild[] =
17 "git upload-archive: archiver died with error";
19 #define MAX_ARGS (64)
21 int cmd_upload_archive_writer(int argc,
22 const char **argv,
23 const char *prefix,
24 struct repository *repo UNUSED)
26 struct strvec sent_argv = STRVEC_INIT;
27 const char *arg_cmd = "argument ";
28 int ret;
30 if (argc != 2 || !strcmp(argv[1], "-h"))
31 usage(upload_archive_usage);
33 if (!enter_repo(argv[1], 0))
34 die("'%s' does not appear to be a git repository", argv[1]);
36 init_archivers();
38 /* put received options in sent_argv[] */
39 strvec_push(&sent_argv, "git-upload-archive");
40 for (;;) {
41 char *buf = packet_read_line(0, NULL);
42 if (!buf)
43 break; /* got a flush */
44 if (sent_argv.nr > MAX_ARGS)
45 die("Too many options (>%d)", MAX_ARGS - 1);
47 if (!starts_with(buf, arg_cmd))
48 die("'argument' token or flush expected");
49 strvec_push(&sent_argv, buf + strlen(arg_cmd));
52 /* parse all options sent by the client */
53 ret = write_archive(sent_argv.nr, sent_argv.v, prefix,
54 the_repository, NULL, 1);
56 strvec_clear(&sent_argv);
57 return ret;
60 __attribute__((format (printf, 1, 2)))
61 static void error_clnt(const char *fmt, ...)
63 struct strbuf buf = STRBUF_INIT;
64 va_list params;
66 va_start(params, fmt);
67 strbuf_vaddf(&buf, fmt, params);
68 va_end(params);
69 send_sideband(1, 3, buf.buf, buf.len, LARGE_PACKET_MAX);
70 die("sent error to the client: %s", buf.buf);
73 static ssize_t process_input(int child_fd, int band)
75 char buf[16384];
76 ssize_t sz = read(child_fd, buf, sizeof(buf));
77 if (sz < 0) {
78 if (errno != EAGAIN && errno != EINTR)
79 error_clnt("read error: %s\n", strerror(errno));
80 return sz;
82 send_sideband(1, band, buf, sz, LARGE_PACKET_MAX);
83 return sz;
86 int cmd_upload_archive(int argc,
87 const char **argv,
88 const char *prefix,
89 struct repository *repo UNUSED)
91 struct child_process writer = CHILD_PROCESS_INIT;
93 BUG_ON_NON_EMPTY_PREFIX(prefix);
95 if (argc == 2 && !strcmp(argv[1], "-h"))
96 usage(upload_archive_usage);
99 * Set up sideband subprocess.
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.
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));
115 packet_write_fmt(1, "ACK\n");
116 packet_flush(1);
118 while (1) {
119 struct pollfd pfd[2];
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);
130 continue;
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;
141 if (finish_command(&writer))
142 error_clnt("%s", deadchild);
143 packet_flush(1);
144 break;
146 return 0;