remove unnecessary initializations
[git/git.git] / ssh-upload.c
1 #ifndef COUNTERPART_ENV_NAME
2 #define COUNTERPART_ENV_NAME "GIT_SSH_FETCH"
3 #endif
4 #ifndef COUNTERPART_PROGRAM_NAME
5 #define COUNTERPART_PROGRAM_NAME "git-ssh-fetch"
6 #endif
7 #ifndef MY_PROGRAM_NAME
8 #define MY_PROGRAM_NAME "git-ssh-upload"
9 #endif
10
11 #include "cache.h"
12 #include "rsh.h"
13 #include "refs.h"
14
15 #include <string.h>
16
17 static unsigned char local_version = 1;
18 static unsigned char remote_version;
19
20 static int verbose;
21
22 static int serve_object(int fd_in, int fd_out) {
23 ssize_t size;
24 unsigned char sha1[20];
25 signed char remote;
26 int posn = 0;
27 do {
28 size = read(fd_in, sha1 + posn, 20 - posn);
29 if (size < 0) {
30 perror("git-ssh-upload: read ");
31 return -1;
32 }
33 if (!size)
34 return -1;
35 posn += size;
36 } while (posn < 20);
37
38 if (verbose)
39 fprintf(stderr, "Serving %s\n", sha1_to_hex(sha1));
40
41 remote = 0;
42
43 if (!has_sha1_file(sha1)) {
44 fprintf(stderr, "git-ssh-upload: could not find %s\n",
45 sha1_to_hex(sha1));
46 remote = -1;
47 }
48
49 write(fd_out, &remote, 1);
50
51 if (remote < 0)
52 return 0;
53
54 return write_sha1_to_fd(fd_out, sha1);
55 }
56
57 static int serve_version(int fd_in, int fd_out)
58 {
59 if (read(fd_in, &remote_version, 1) < 1)
60 return -1;
61 write(fd_out, &local_version, 1);
62 return 0;
63 }
64
65 static int serve_ref(int fd_in, int fd_out)
66 {
67 char ref[PATH_MAX];
68 unsigned char sha1[20];
69 int posn = 0;
70 signed char remote = 0;
71 do {
72 if (read(fd_in, ref + posn, 1) < 1)
73 return -1;
74 posn++;
75 } while (ref[posn - 1]);
76
77 if (verbose)
78 fprintf(stderr, "Serving %s\n", ref);
79
80 if (get_ref_sha1(ref, sha1))
81 remote = -1;
82 write(fd_out, &remote, 1);
83 if (remote)
84 return 0;
85 write(fd_out, sha1, 20);
86 return 0;
87 }
88
89
90 static void service(int fd_in, int fd_out) {
91 char type;
92 int retval;
93 do {
94 retval = read(fd_in, &type, 1);
95 if (retval < 1) {
96 if (retval < 0)
97 perror("git-ssh-upload: read ");
98 return;
99 }
100 if (type == 'v' && serve_version(fd_in, fd_out))
101 return;
102 if (type == 'o' && serve_object(fd_in, fd_out))
103 return;
104 if (type == 'r' && serve_ref(fd_in, fd_out))
105 return;
106 } while (1);
107 }
108
109 static const char ssh_push_usage[] =
110 MY_PROGRAM_NAME " [-c] [-t] [-a] [-w ref] commit-id url";
111
112 int main(int argc, char **argv)
113 {
114 int arg = 1;
115 char *commit_id;
116 char *url;
117 int fd_in, fd_out;
118 const char *prog;
119 unsigned char sha1[20];
120 char hex[41];
121
122 prog = getenv(COUNTERPART_ENV_NAME);
123 if (!prog) prog = COUNTERPART_PROGRAM_NAME;
124
125 setup_git_directory();
126
127 while (arg < argc && argv[arg][0] == '-') {
128 if (argv[arg][1] == 'w')
129 arg++;
130 arg++;
131 }
132 if (argc < arg + 2)
133 usage(ssh_push_usage);
134 commit_id = argv[arg];
135 url = argv[arg + 1];
136 if (get_sha1(commit_id, sha1))
137 die("Not a valid object name %s", commit_id);
138 memcpy(hex, sha1_to_hex(sha1), sizeof(hex));
139 argv[arg] = hex;
140
141 if (setup_connection(&fd_in, &fd_out, prog, url, arg, argv + 1))
142 return 1;
143
144 service(fd_in, fd_out);
145 return 0;
146 }