summaryrefslogtreecommitdiff
path: root/i/pc104/initrd/conf/busybox/loginutils/addgroup.c
diff options
context:
space:
mode:
Diffstat (limited to 'i/pc104/initrd/conf/busybox/loginutils/addgroup.c')
-rw-r--r--i/pc104/initrd/conf/busybox/loginutils/addgroup.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/loginutils/addgroup.c b/i/pc104/initrd/conf/busybox/loginutils/addgroup.c
new file mode 100644
index 0000000..78250a4
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/loginutils/addgroup.c
@@ -0,0 +1,111 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * addgroup - add users to /etc/passwd and /etc/shadow
+ *
+ * Copyright (C) 1999 by Lineo, inc. and John Beppu
+ * Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ *
+ */
+
+#include "busybox.h"
+
+/* make sure gr_name isn't taken, make sure gid is kosher
+ * return 1 on failure */
+static int group_study(struct group *g)
+{
+ enum { max = 65000 };
+ FILE *etc_group;
+ gid_t desired;
+ /* Using _r function to avoid static buffers pulled in */
+ char buffer[256];
+ struct group grp;
+ struct group *result;
+
+ etc_group = xfopen(bb_path_group_file, "r");
+
+ /* make sure gr_name isn't taken, make sure gid is kosher */
+ desired = g->gr_gid;
+ while (!fgetgrent_r(etc_group, &grp, buffer, sizeof(buffer), &result)) {
+ if ((strcmp(grp.gr_name, g->gr_name)) == 0) {
+ bb_error_msg_and_die("%s: group already in use", g->gr_name);
+ }
+ if ((desired) && grp.gr_gid == desired) {
+ bb_error_msg_and_die("%d: gid already in use",
+ desired);
+ }
+ if ((grp.gr_gid > g->gr_gid) && (grp.gr_gid < max)) {
+ g->gr_gid = grp.gr_gid;
+ }
+ }
+ if (ENABLE_FEATURE_CLEAN_UP)
+ fclose(etc_group);
+
+ /* gid */
+ g->gr_gid++;
+ if (desired) {
+ g->gr_gid = desired;
+ }
+ /* return 1; */
+ return 0;
+}
+
+/* append a new user to the passwd file */
+static int addgroup(char *group, gid_t gid, const char *user)
+{
+ FILE *file;
+ struct group gr;
+
+ /* make sure gid and group haven't already been allocated */
+ gr.gr_gid = gid;
+ gr.gr_name = group;
+ if (group_study(&gr))
+ return 1;
+
+ /* add entry to group */
+ file = xfopen(bb_path_group_file, "a");
+ /* group:passwd:gid:userlist */
+ fprintf(file, "%s:%s:%d:%s\n", group, "x", gr.gr_gid, user);
+ if (ENABLE_FEATURE_CLEAN_UP)
+ fclose(file);
+
+#if ENABLE_FEATURE_SHADOWPASSWDS
+ file = fopen_or_warn(bb_path_gshadow_file, "a");
+ if (file) {
+ fprintf(file, "%s:!::\n", group);
+ if (ENABLE_FEATURE_CLEAN_UP)
+ fclose(file);
+ }
+#endif
+
+ /* return 1; */
+ return 0;
+}
+
+/*
+ * addgroup will take a login_name as its first parameter.
+ *
+ * gid can be customized via command-line parameters.
+ */
+int addgroup_main(int argc, char **argv);
+int addgroup_main(int argc, char **argv)
+{
+ char *group;
+ gid_t gid = 0;
+
+ /* check for min, max and missing args and exit on error */
+ opt_complementary = "-1:?2:?";
+ if (getopt32(argc, argv, "g:", &group)) {
+ gid = xatoul_range(group, 0, (gid_t)ULONG_MAX);
+ }
+ /* move past the commandline options */
+ argv += optind;
+
+ /* need to be root */
+ if (geteuid()) {
+ bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
+ }
+
+ return addgroup(argv[0], gid, argv[1] ? argv[1] : "");
+}