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authorErik Faye-Lund <kusmabite@gmail.com>2010-11-04 01:35:24 (GMT)
committerJunio C Hamano <gitster@pobox.com>2010-11-04 23:53:52 (GMT)
commita666b472c7d9e72bfacf4145405dbe8924ee153d (patch)
tree6b1bf5f321bf4f00206787a2ab9009f52de07b6c /daemon.c
parent9cddf56ef13c8575ac0c68d82e6196e5b0a2900d (diff)
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daemon: opt-out on features that require posix
Windows does not supply the POSIX-functions fork(), setuuid(), setgid(), setsid() and initgroups(). Error out if --user or --detach is specified when if so. MinGW doesn't have prototypes and headers for inet_ntop and inet_pton, so include our implementation instead. MSVC does, so avoid doing so there. Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'daemon.c')
-rw-r--r--daemon.c88
1 files changed, 64 insertions, 24 deletions
diff --git a/daemon.c b/daemon.c
index 17028b6..13435b4 100644
--- a/daemon.c
+++ b/daemon.c
@@ -940,6 +940,62 @@ static void sanitize_stdfds(void)
close(fd);
}
+#ifdef NO_POSIX_GOODIES
+
+struct credentials;
+
+static void drop_privileges(struct credentials *cred)
+{
+ /* nothing */
+}
+
+static void daemonize(void)
+{
+ die("--detach not supported on this platform");
+}
+
+static struct credentials *prepare_credentials(const char *user_name,
+ const char *group_name)
+{
+ die("--user not supported on this platform");
+}
+
+#else
+
+struct credentials {
+ struct passwd *pass;
+ gid_t gid;
+};
+
+static void drop_privileges(struct credentials *cred)
+{
+ if (cred && (initgroups(cred->pass->pw_name, cred->gid) ||
+ setgid (cred->gid) || setuid(cred->pass->pw_uid)))
+ die("cannot drop privileges");
+}
+
+static struct credentials *prepare_credentials(const char *user_name,
+ const char *group_name)
+{
+ static struct credentials c;
+
+ c.pass = getpwnam(user_name);
+ if (!c.pass)
+ die("user not found - %s", user_name);
+
+ if (!group_name)
+ c.gid = c.pass->pw_gid;
+ else {
+ struct group *group = getgrnam(group_name);
+ if (!group)
+ die("group not found - %s", group_name);
+
+ c.gid = group->gr_gid;
+ }
+
+ return &c;
+}
+
static void daemonize(void)
{
switch (fork()) {
@@ -957,6 +1013,7 @@ static void daemonize(void)
close(2);
sanitize_stdfds();
}
+#endif
static void store_pid(const char *path)
{
@@ -967,7 +1024,8 @@ static void store_pid(const char *path)
die_errno("failed to write pid file '%s'", path);
}
-static int serve(struct string_list *listen_addr, int listen_port, struct passwd *pass, gid_t gid)
+static int serve(struct string_list *listen_addr, int listen_port,
+ struct credentials *cred)
{
struct socketlist socklist = { NULL, 0, 0 };
@@ -976,10 +1034,7 @@ static int serve(struct string_list *listen_addr, int listen_port, struct passwd
die("unable to allocate any listen sockets on port %u",
listen_port);
- if (pass && gid &&
- (initgroups(pass->pw_name, gid) || setgid (gid) ||
- setuid(pass->pw_uid)))
- die("cannot drop privileges");
+ drop_privileges(cred);
return service_loop(&socklist);
}
@@ -991,9 +1046,7 @@ int main(int argc, char **argv)
int serve_mode = 0, inetd_mode = 0;
const char *pid_file = NULL, *user_name = NULL, *group_name = NULL;
int detach = 0;
- struct passwd *pass = NULL;
- struct group *group;
- gid_t gid = 0;
+ struct credentials *cred = NULL;
int i;
git_extract_argv0_path(argv[0]);
@@ -1139,21 +1192,8 @@ int main(int argc, char **argv)
if (group_name && !user_name)
die("--group supplied without --user");
- if (user_name) {
- pass = getpwnam(user_name);
- if (!pass)
- die("user not found - %s", user_name);
-
- if (!group_name)
- gid = pass->pw_gid;
- else {
- group = getgrnam(group_name);
- if (!group)
- die("group not found - %s", group_name);
-
- gid = group->gr_gid;
- }
- }
+ if (user_name)
+ cred = prepare_credentials(user_name, group_name);
if (strict_paths && (!ok_paths || !*ok_paths))
die("option --strict-paths requires a whitelist");
@@ -1187,5 +1227,5 @@ int main(int argc, char **argv)
cld_argv[argc] = "--serve";
cld_argv[argc+1] = NULL;
- return serve(&listen_addr, listen_port, pass, gid);
+ return serve(&listen_addr, listen_port, cred);
}