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#include "cache.h"
#include "pkt-line.h"
#include "quote.h"
#include <sys/wait.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
/*
* Read all the refs from the other end
*/
struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match)
{
*list = NULL;
for (;;) {
struct ref *ref;
unsigned char old_sha1[20];
static char buffer[1000];
char *name;
int len;
len = packet_read_line(in, buffer, sizeof(buffer));
if (!len)
break;
if (buffer[len-1] == '\n')
buffer[--len] = 0;
if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ')
die("protocol error: expected sha/ref, got '%s'", buffer);
name = buffer + 41;
if (nr_match && !path_match(name, nr_match, match))
continue;
ref = xmalloc(sizeof(*ref) + len - 40);
memcpy(ref->old_sha1, old_sha1, 20);
memset(ref->new_sha1, 0, 20);
memcpy(ref->name, buffer + 41, len - 40);
ref->next = NULL;
*list = ref;
list = &ref->next;
}
return list;
}
int get_ack(int fd, unsigned char *result_sha1)
{
static char line[1000];
int len = packet_read_line(fd, line, sizeof(line));
if (!len)
die("git-fetch-pack: expected ACK/NAK, got EOF");
if (line[len-1] == '\n')
line[--len] = 0;
if (!strcmp(line, "NAK"))
return 0;
if (!strncmp(line, "ACK ", 3)) {
if (!get_sha1_hex(line+4, result_sha1))
return 1;
}
die("git-fetch_pack: expected ACK/NAK, got '%s'", line);
}
int path_match(const char *path, int nr, char **match)
{
int i;
int pathlen = strlen(path);
for (i = 0; i < nr; i++) {
char *s = match[i];
int len = strlen(s);
if (!len || len > pathlen)
continue;
if (memcmp(path + pathlen - len, s, len))
continue;
if (pathlen > len && path[pathlen - len - 1] != '/')
continue;
*s = 0;
return 1;
}
return 0;
}
enum protocol {
PROTO_LOCAL = 1,
PROTO_SSH,
PROTO_GIT,
};
static enum protocol get_protocol(const char *name)
{
if (!strcmp(name, "ssh"))
return PROTO_SSH;
if (!strcmp(name, "git"))
return PROTO_GIT;
die("I don't handle protocol '%s'", name);
}
static void lookup_host(const char *host, struct sockaddr *in)
{
struct addrinfo *res;
int ret;
ret = getaddrinfo(host, NULL, NULL, &res);
if (ret)
die("Unable to look up %s (%s)", host, gai_strerror(ret));
*in = *res->ai_addr;
freeaddrinfo(res);
}
static int git_tcp_connect(int fd[2], const char *prog, char *host, char *path)
{
struct sockaddr addr;
int port = DEFAULT_GIT_PORT, sockfd;
char *colon;
colon = strchr(host, ':');
if (colon) {
char *end;
unsigned long n = strtoul(colon+1, &end, 0);
if (colon[1] && !*end) {
*colon = 0;
port = n;
}
}
lookup_host(host, &addr);
((struct sockaddr_in *)&addr)->sin_port = htons(port);
sockfd = socket(PF_INET, SOCK_STREAM, IPPROTO_IP);
if (sockfd < 0)
die("unable to create socket (%s)", strerror(errno));
if (connect(sockfd, (void *)&addr, sizeof(addr)) < 0)
die("unable to connect (%s)", strerror(errno));
fd[0] = sockfd;
fd[1] = sockfd;
packet_write(sockfd, "%s %s\n", prog, path);
return 0;
}
/*
* Yeah, yeah, fixme. Need to pass in the heads etc.
*/
int git_connect(int fd[2], char *url, const char *prog)
{
char command[1024];
char *host, *path;
char *colon;
int pipefd[2][2];
pid_t pid;
enum protocol protocol;
host = NULL;
path = url;
colon = strchr(url, ':');
protocol = PROTO_LOCAL;
if (colon) {
*colon = 0;
host = url;
path = colon+1;
protocol = PROTO_SSH;
if (!memcmp(path, "//", 2)) {
char *slash = strchr(path + 2, '/');
if (slash) {
int nr = slash - path - 2;
memmove(path, path+2, nr);
path[nr] = 0;
protocol = get_protocol(url);
host = path;
path = slash;
}
}
}
if (protocol == PROTO_GIT)
return git_tcp_connect(fd, prog, host, path);
if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
die("unable to create pipe pair for communication");
pid = fork();
if (!pid) {
snprintf(command, sizeof(command), "%s %s", prog,
sq_quote(path));
dup2(pipefd[1][0], 0);
dup2(pipefd[0][1], 1);
close(pipefd[0][0]);
close(pipefd[0][1]);
close(pipefd[1][0]);
close(pipefd[1][1]);
if (protocol == PROTO_SSH)
execlp("ssh", "ssh", host, command, NULL);
else
execlp("sh", "sh", "-c", command, NULL);
die("exec failed");
}
fd[0] = pipefd[0][0];
fd[1] = pipefd[1][1];
close(pipefd[0][1]);
close(pipefd[1][0]);
return pid;
}
int finish_connect(pid_t pid)
{
int ret;
for (;;) {
ret = waitpid(pid, NULL, 0);
if (!ret)
break;
if (errno != EINTR)
break;
}
return ret;
}
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