summaryrefslogtreecommitdiff
path: root/ssh-upload.c
blob: 901e0366df25f23530e68237eabe59891a5b78d7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
#ifndef COUNTERPART_ENV_NAME
#define COUNTERPART_ENV_NAME "GIT_SSH_FETCH"
#endif
#ifndef COUNTERPART_PROGRAM_NAME
#define COUNTERPART_PROGRAM_NAME "git-ssh-fetch"
#endif
#ifndef MY_PROGRAM_NAME
#define MY_PROGRAM_NAME "git-ssh-upload"
#endif
 
#include "cache.h"
#include "rsh.h"
#include "refs.h"
 
static unsigned char local_version = 1;
static unsigned char remote_version;
 
static int verbose;
 
static int serve_object(int fd_in, int fd_out) {
	ssize_t size;
	unsigned char sha1[20];
	signed char remote;
	int posn = 0;
	do {
		size = read(fd_in, sha1 + posn, 20 - posn);
		if (size < 0) {
			perror("git-ssh-upload: read ");
			return -1;
		}
		if (!size)
			return -1;
		posn += size;
	} while (posn < 20);
 
	if (verbose)
		fprintf(stderr, "Serving %s\n", sha1_to_hex(sha1));
 
	remote = 0;
 
	if (!has_sha1_file(sha1)) {
		fprintf(stderr, "git-ssh-upload: could not find %s\n",
			sha1_to_hex(sha1));
		remote = -1;
	}
 
	write(fd_out, &remote, 1);
 
	if (remote < 0)
		return 0;
 
	return write_sha1_to_fd(fd_out, sha1);
}
 
static int serve_version(int fd_in, int fd_out)
{
	if (read(fd_in, &remote_version, 1) < 1)
		return -1;
	write(fd_out, &local_version, 1);
	return 0;
}
 
static int serve_ref(int fd_in, int fd_out)
{
	char ref[PATH_MAX];
	unsigned char sha1[20];
	int posn = 0;
	signed char remote = 0;
	do {
		if (posn >= PATH_MAX || read(fd_in, ref + posn, 1) < 1)
			return -1;
		posn++;
	} while (ref[posn - 1]);
 
	if (verbose)
		fprintf(stderr, "Serving %s\n", ref);
 
	if (get_ref_sha1(ref, sha1))
		remote = -1;
	write(fd_out, &remote, 1);
	if (remote)
		return 0;
	write(fd_out, sha1, 20);
        return 0;
}
 
 
static void service(int fd_in, int fd_out) {
	char type;
	int retval;
	do {
		retval = read(fd_in, &type, 1);
		if (retval < 1) {
			if (retval < 0)
				perror("git-ssh-upload: read ");
			return;
		}
		if (type == 'v' && serve_version(fd_in, fd_out))
			return;
		if (type == 'o' && serve_object(fd_in, fd_out))
			return;
		if (type == 'r' && serve_ref(fd_in, fd_out))
			return;
	} while (1);
}
 
static const char ssh_push_usage[] =
	MY_PROGRAM_NAME " [-c] [-t] [-a] [-w ref] commit-id url";
 
int main(int argc, char **argv)
{
	int arg = 1;
        char *commit_id;
        char *url;
	int fd_in, fd_out;
	const char *prog;
	unsigned char sha1[20];
	char hex[41];
 
	prog = getenv(COUNTERPART_ENV_NAME);
	if (!prog) prog = COUNTERPART_PROGRAM_NAME;
 
	setup_git_directory();
 
	while (arg < argc && argv[arg][0] == '-') {
		if (argv[arg][1] == 'w')
			arg++;
                arg++;
        }
	if (argc < arg + 2)
		usage(ssh_push_usage);
	commit_id = argv[arg];
	url = argv[arg + 1];
	if (get_sha1(commit_id, sha1))
		die("Not a valid object name %s", commit_id);
	memcpy(hex, sha1_to_hex(sha1), sizeof(hex));
	argv[arg] = hex;
 
	if (setup_connection(&fd_in, &fd_out, prog, url, arg, argv + 1))
		return 1;
 
	service(fd_in, fd_out);
	return 0;
}