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Add a "git-daemon" that listens on a TCP port

.. and does a "git-upload-pack" on demand.
tags/v0.99.1
Linus Torvalds 14 years ago
parent
commit
a87e8be2ae
2 changed files with 118 additions and 1 deletions
  1. +1
    -1
      Makefile
  2. +117
    -0
      daemon.c

+ 1
- 1
Makefile View File

@@ -48,7 +48,7 @@ PROG= git-update-cache git-diff-files git-init-db git-write-tree \
git-diff-stages git-rev-parse git-patch-id git-pack-objects \
git-unpack-objects git-verify-pack git-receive-pack git-send-pack \
git-prune-packed git-fetch-pack git-upload-pack git-clone-pack \
git-show-index
git-show-index git-daemon

all: $(PROG)



+ 117
- 0
daemon.c View File

@@ -0,0 +1,117 @@
#include "cache.h"
#include "pkt-line.h"
#include <sys/socket.h>
#include <netinet/in.h>

static const char daemon_usage[] = "git-daemon [--port=n]";

static int upload(char *dir, int dirlen)
{
if (chdir(dir) < 0)
return -1;
chdir(".git");

/*
* Security on the cheap.
*
* We want a readable HEAD, usable "objects" directory, and
* a "git-daemon-export-ok" flag that says that the other side
* is ok with us doing this.
*/
if (access("git-daemon-export-ok", F_OK) ||
access("objects/00", X_OK) ||
access("HEAD", R_OK))
return -1;

/* git-upload-pack only ever reads stuff, so this is safe */
execlp("git-upload-pack", "git-upload-pack", ".", NULL);
return -1;
}

static int execute(char *line, int len)
{
if (!strncmp("git-upload-pack /", line, 17))
return upload(line + 16, len - 16);

fprintf(stderr, "got bad connection '%s'\n", line);
return -1;
}

static void handle(int incoming, struct sockaddr_in *addr, int addrlen)
{
static char line[1000];
int len;

if (fork()) {
close(incoming);
return;
}

dup2(incoming, 0);
dup2(incoming, 1);
close(incoming);
len = packet_read_line(0, line, sizeof(line));

if (len && line[len-1] == '\n')
line[--len] = 0;

exit(execute(line, len));
}

static int serve(int port)
{
int sockfd;
struct sockaddr_in addr;

sockfd = socket(PF_INET, SOCK_STREAM, IPPROTO_IP);
if (sockfd < 0)
die("unable to open socket (%s)", strerror(errno));
memset(&addr, 0, sizeof(addr));
addr.sin_port = htons(port);
addr.sin_family = AF_INET;
if (bind(sockfd, (void *)&addr, sizeof(addr)) < 0)
die("unable to bind to port %d (%s)", port, strerror(errno));
if (listen(sockfd, 5) < 0)
die("unable to listen to port %d (%s)", port, strerror(errno));

for (;;) {
struct sockaddr_in in;
socklen_t addrlen = sizeof(in);
int incoming = accept(sockfd, (void *)&in, &addrlen);

if (incoming < 0) {
switch (errno) {
case EAGAIN:
case EINTR:
case ECONNABORTED:
continue;
default:
die("accept returned %s", strerror(errno));
}
}
handle(incoming, &in, addrlen);
}
}

int main(int argc, char **argv)
{
int port = DEFAULT_GIT_PORT;
int i;

for (i = 1; i < argc; i++) {
char *arg = argv[i];

if (!strncmp(arg, "--port=", 7)) {
char *end;
unsigned long n;
n = strtoul(arg+7, &end, 0);
if (arg[7] && !*end) {
port = n;
continue;
}
}
usage(daemon_usage);
}

return serve(port);
}

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