141 lines
2.7 KiB
C
141 lines
2.7 KiB
C
#include "cache.h"
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#include "rsh.h"
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#include "refs.h"
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#include <string.h>
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static unsigned char local_version = 1;
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static unsigned char remote_version = 0;
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static int serve_object(int fd_in, int fd_out) {
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ssize_t size;
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int posn = 0;
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unsigned char sha1[20];
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unsigned long objsize;
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void *buf;
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signed char remote;
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do {
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size = read(fd_in, sha1 + posn, 20 - posn);
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if (size < 0) {
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perror("git-ssh-push: read ");
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return -1;
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}
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if (!size)
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return -1;
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posn += size;
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} while (posn < 20);
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/* fprintf(stderr, "Serving %s\n", sha1_to_hex(sha1)); */
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remote = 0;
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buf = map_sha1_file(sha1, &objsize);
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if (!buf) {
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fprintf(stderr, "git-ssh-push: could not find %s\n",
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sha1_to_hex(sha1));
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remote = -1;
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}
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write(fd_out, &remote, 1);
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if (remote < 0)
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return 0;
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posn = 0;
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do {
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size = write(fd_out, buf + posn, objsize - posn);
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if (size <= 0) {
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if (!size) {
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fprintf(stderr, "git-ssh-push: write closed");
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} else {
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perror("git-ssh-push: write ");
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}
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return -1;
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}
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posn += size;
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} while (posn < objsize);
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return 0;
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}
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static int serve_version(int fd_in, int fd_out)
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{
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if (read(fd_in, &remote_version, 1) < 1)
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return -1;
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write(fd_out, &local_version, 1);
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return 0;
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}
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static int serve_ref(int fd_in, int fd_out)
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{
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char ref[PATH_MAX];
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unsigned char sha1[20];
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int posn = 0;
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signed char remote = 0;
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do {
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if (read(fd_in, ref + posn, 1) < 1)
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return -1;
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posn++;
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} while (ref[posn - 1]);
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if (get_ref_sha1(ref, sha1))
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remote = -1;
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write(fd_out, &remote, 1);
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if (remote)
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return 0;
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write(fd_out, sha1, 20);
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return 0;
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}
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static void service(int fd_in, int fd_out) {
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char type;
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int retval;
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do {
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retval = read(fd_in, &type, 1);
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if (retval < 1) {
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if (retval < 0)
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perror("git-ssh-push: read ");
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return;
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}
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if (type == 'v' && serve_version(fd_in, fd_out))
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return;
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if (type == 'o' && serve_object(fd_in, fd_out))
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return;
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if (type == 'r' && serve_ref(fd_in, fd_out))
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return;
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} while (1);
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}
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static const char *ssh_push_usage =
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"git-ssh-push [-c] [-t] [-a] [-w ref] commit-id url";
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int main(int argc, char **argv)
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{
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int arg = 1;
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char *commit_id;
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char *url;
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int fd_in, fd_out;
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const char *prog = getenv("GIT_SSH_PULL") ? : "git-ssh-pull";
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unsigned char sha1[20];
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char hex[41];
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while (arg < argc && argv[arg][0] == '-') {
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if (argv[arg][1] == 'w')
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arg++;
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arg++;
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}
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if (argc < arg + 2)
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usage(ssh_push_usage);
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commit_id = argv[arg];
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url = argv[arg + 1];
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if (get_sha1(commit_id, sha1))
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usage(ssh_push_usage);
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memcpy(hex, sha1_to_hex(sha1), sizeof(hex));
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argv[arg] = hex;
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if (setup_connection(&fd_in, &fd_out, prog, url, arg, argv + 1))
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return 1;
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service(fd_in, fd_out);
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return 0;
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}
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