fetch-pack: -k option to keep downloaded pack.
[git/git.git] / fetch-clone.c
1 #include "cache.h"
2 #include <sys/wait.h>
3
4 static int finish_pack(const char *pack_tmp_name, const char *me)
5 {
6 int pipe_fd[2];
7 pid_t pid;
8 char idx[PATH_MAX];
9 char final[PATH_MAX];
10 char hash[41];
11 unsigned char sha1[20];
12 char *cp;
13 int err = 0;
14
15 if (pipe(pipe_fd) < 0)
16 die("%s: unable to set up pipe", me);
17
18 strcpy(idx, pack_tmp_name); /* ".git/objects/pack-XXXXXX" */
19 cp = strrchr(idx, '/');
20 memcpy(cp, "/pidx", 5);
21
22 pid = fork();
23 if (pid < 0)
24 die("git-clone-pack: unable to fork off git-index-pack");
25 if (!pid) {
26 close(0);
27 dup2(pipe_fd[1], 1);
28 close(pipe_fd[0]);
29 close(pipe_fd[1]);
30 execlp("git-index-pack","git-index-pack",
31 "-o", idx, pack_tmp_name, NULL);
32 error("cannot exec git-index-pack <%s> <%s>",
33 idx, pack_tmp_name);
34 exit(1);
35 }
36 close(pipe_fd[1]);
37 if (read(pipe_fd[0], hash, 40) != 40) {
38 error("%s: unable to read from git-index-pack", me);
39 err = 1;
40 }
41 close(pipe_fd[0]);
42
43 for (;;) {
44 int status, code;
45 int retval = waitpid(pid, &status, 0);
46
47 if (retval < 0) {
48 if (errno == EINTR)
49 continue;
50 error("waitpid failed (%s)", strerror(retval));
51 goto error_die;
52 }
53 if (WIFSIGNALED(status)) {
54 int sig = WTERMSIG(status);
55 error("git-index-pack died of signal %d", sig);
56 goto error_die;
57 }
58 if (!WIFEXITED(status)) {
59 error("git-index-pack died of unnatural causes %d",
60 status);
61 goto error_die;
62 }
63 code = WEXITSTATUS(status);
64 if (code) {
65 error("git-index-pack died with error code %d", code);
66 goto error_die;
67 }
68 if (err)
69 goto error_die;
70 break;
71 }
72 hash[40] = 0;
73 if (get_sha1_hex(hash, sha1)) {
74 error("git-index-pack reported nonsense '%s'", hash);
75 goto error_die;
76 }
77 /* Now we have pack in pack_tmp_name[], and
78 * idx in idx[]; rename them to their final names.
79 */
80 snprintf(final, sizeof(final),
81 "%s/pack/pack-%s.pack", get_object_directory(), hash);
82 move_temp_to_file(pack_tmp_name, final);
83 chmod(final, 0444);
84 snprintf(final, sizeof(final),
85 "%s/pack/pack-%s.idx", get_object_directory(), hash);
86 move_temp_to_file(idx, final);
87 chmod(final, 0444);
88 return 0;
89
90 error_die:
91 unlink(idx);
92 unlink(pack_tmp_name);
93 exit(1);
94 }
95
96 int receive_unpack_pack(int fd[2], const char *me, int quiet)
97 {
98 int status;
99 pid_t pid;
100
101 pid = fork();
102 if (pid < 0)
103 die("%s: unable to fork off git-unpack-objects", me);
104 if (!pid) {
105 dup2(fd[0], 0);
106 close(fd[0]);
107 close(fd[1]);
108 execlp("git-unpack-objects", "git-unpack-objects",
109 quiet ? "-q" : NULL, NULL);
110 die("git-unpack-objects exec failed");
111 }
112 close(fd[0]);
113 close(fd[1]);
114 while (waitpid(pid, &status, 0) < 0) {
115 if (errno != EINTR)
116 die("waiting for git-unpack-objects: %s",
117 strerror(errno));
118 }
119 if (WIFEXITED(status)) {
120 int code = WEXITSTATUS(status);
121 if (code)
122 die("git-unpack-objects died with error code %d",
123 code);
124 return 0;
125 }
126 if (WIFSIGNALED(status)) {
127 int sig = WTERMSIG(status);
128 die("git-unpack-objects died of signal %d", sig);
129 }
130 die("git-unpack-objects died of unnatural causes %d", status);
131 }
132
133 int receive_keep_pack(int fd[2], const char *me)
134 {
135 char tmpfile[PATH_MAX];
136 int ofd, ifd;
137
138 ifd = fd[0];
139 snprintf(tmpfile, sizeof(tmpfile),
140 "%s/pack/tmp-XXXXXX", get_object_directory());
141 ofd = mkstemp(tmpfile);
142 if (ofd < 0)
143 return error("unable to create temporary file %s", tmpfile);
144
145 while (1) {
146 char buf[8192];
147 ssize_t sz, wsz, pos;
148 sz = read(ifd, buf, sizeof(buf));
149 if (sz == 0)
150 break;
151 if (sz < 0) {
152 error("error reading pack (%s)", strerror(errno));
153 close(ofd);
154 unlink(tmpfile);
155 return -1;
156 }
157 pos = 0;
158 while (pos < sz) {
159 wsz = write(ofd, buf + pos, sz - pos);
160 if (wsz < 0) {
161 error("error writing pack (%s)",
162 strerror(errno));
163 close(ofd);
164 unlink(tmpfile);
165 return -1;
166 }
167 pos += wsz;
168 }
169 }
170 close(ofd);
171 return finish_pack(tmpfile, me);
172 }