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#include "cache.h"
#include "rsh.h"
#include "refs.h"
#include <string.h>
unsigned char local_version = 1;
unsigned char remote_version = 0;
int serve_object(int fd_in, int fd_out) {
ssize_t size;
int posn = 0;
unsigned char sha1[20];
unsigned long objsize;
void *buf;
signed char remote;
do {
size = read(fd_in, sha1 + posn, 20 - posn);
if (size < 0) {
perror("git-ssh-push: read ");
return -1;
}
if (!size)
return -1;
posn += size;
} while (posn < 20);
/* fprintf(stderr, "Serving %s\n", sha1_to_hex(sha1)); */
remote = 0;
buf = map_sha1_file(sha1, &objsize);
if (!buf) {
fprintf(stderr, "git-ssh-push: could not find %s\n",
sha1_to_hex(sha1));
remote = -1;
}
write(fd_out, &remote, 1);
if (remote < 0)
return 0;
posn = 0;
do {
size = write(fd_out, buf + posn, objsize - posn);
if (size <= 0) {
if (!size) {
fprintf(stderr, "git-ssh-push: write closed");
} else {
perror("git-ssh-push: write ");
}
return -1;
}
posn += size;
} while (posn < objsize);
return 0;
}
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;
}
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 (read(fd_in, ref + posn, 1) < 1)
return -1;
posn++;
} while (ref[posn - 1]);
if (get_ref_sha1(ref, sha1))
remote = -1;
write(fd_out, &remote, 1);
if (remote)
return 0;
write(fd_out, sha1, 20);
return 0;
}
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-push: 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 =
"git-ssh-push [-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 = getenv("GIT_SSH_PULL") ? : "git-ssh-pull";
unsigned char sha1[20];
char hex[41];
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))
usage(ssh_push_usage);
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;
}
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