X-Git-Url: https://pd.if.org/git/?p=startuptools;a=blobdiff_plain;f=setid.c;fp=setid.c;h=d37c40591fd497e230798ee887d70644309536da;hp=0000000000000000000000000000000000000000;hb=a99b3128aa7428fe93a85e48bc9169a2fe8c9746;hpb=257f33dd235edbdd9d2e185849b2f9cfc0617ea2

diff --git a/setid.c b/setid.c
new file mode 100644
index 0000000..d37c405
--- /dev/null
+++ b/setid.c
@@ -0,0 +1,61 @@
+/*
+ * set id
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include <unistd.h>
+#include <sys/types.h>
+#include <pwd.h>
+
+#include <grp.h>
+
+       int getgrouplist(const char *user, gid_t group,
+                        gid_t *groups, int *ngroups);
+
+
+
+#include "exec.c"
+#if 0
+#include "die.c"
+#endif
+
+/*
+ * chids <uid> cmd... run command as uid, gid from passwd
+ * chids <uid:gid> cmd run command as uid, gid
+ * chids <uid:> cmd run command as uid, gid from passwd,groups
+ */
+int main(int ac, char *av[]) {
+	struct passwd *pw;
+	uid_t uid;
+
+	uid = geteuid();
+
+	pw = getpwnam(av[1]);
+	if (!pw) {
+		perror("getpwnam");
+		exit(EXIT_FAILURE);
+	}
+
+	if (uid == 0 && setgroups(0,0) == -1) {
+		perror("setgroups");
+		exit(EXIT_FAILURE);
+	};
+
+	if (setgid(pw->pw_gid) == -1) {
+		perror("setgid");
+		exit(EXIT_FAILURE);
+	};
+
+	if (setuid(pw->pw_uid) == -1) {
+		perror("setuid");
+		exit(EXIT_FAILURE);
+	};
+
+	do_exec(2, ac, av);
+
+	/* shouldn't get here... */
+	return EXIT_FAILURE;
+}