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-rw-r--r--Makefile2
-rw-r--r--daemon.c117
2 files changed, 118 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index 779fbbb..21dd582 100644
--- a/Makefile
+++ b/Makefile
@@ -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)
diff --git a/daemon.c b/daemon.c
new file mode 100644
index 0000000..315a74b
--- /dev/null
+++ b/daemon.c
@@ -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);
+}