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inetd: use change_identity().
libbb: shrink our internal initgroups(). httpd: remove stray 'else' and 'index_page = "index.html"' function old new delta httpd_main 750 743 -7 inetd_main 2033 2011 -22 bb_internal_initgroups 251 228 -23 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-52) Total: -52 bytes
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@ -35,7 +35,7 @@ void change_identity(const struct passwd *pw)
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{
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if (initgroups(pw->pw_name, pw->pw_gid) == -1)
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bb_perror_msg_and_die("can't set groups");
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endgrent(); /* ?? */
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endgrent(); /* helps to close a fd used internally by libc */
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xsetgid(pw->pw_gid);
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xsetuid(pw->pw_uid);
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}
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@ -630,12 +630,11 @@ int initgroups(const char *user, gid_t gid)
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char buff[PWD_BUFFER_SIZE];
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rv = -1;
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grfile = fopen(_PATH_GROUP, "r");
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if (grfile != NULL) {
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/* We alloc space for 8 gids at a time. */
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group_list = (gid_t *) malloc(8*sizeof(gid_t *));
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if (group_list
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&& ((grfile = fopen(_PATH_GROUP, "r")) != NULL)
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) {
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/* We alloc space for 8 gids at a time. */
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group_list = xmalloc(8 * sizeof(gid_t *));
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*group_list = gid;
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num_groups = 1;
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@ -645,13 +644,8 @@ int initgroups(const char *user, gid_t gid)
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for (m = group.gr_mem; *m; m++) {
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if (!strcmp(*m, user)) {
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if (!(num_groups & 7)) {
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gid_t *tmp = (gid_t *)
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realloc(group_list,
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(num_groups+8) * sizeof(gid_t *));
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if (!tmp) {
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rv = -1;
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goto DO_CLOSE;
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}
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gid_t *tmp = xrealloc(group_list,
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(num_groups+8) * sizeof(gid_t *));
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group_list = tmp;
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}
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group_list[num_groups++] = group.gr_gid;
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@ -662,13 +656,10 @@ int initgroups(const char *user, gid_t gid)
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}
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rv = setgroups(num_groups, group_list);
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DO_CLOSE:
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free(group_list);
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fclose(grfile);
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}
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/* group_list will be NULL if initial malloc failed, which may trigger
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* warnings from various malloc debuggers. */
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free(group_list);
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return rv;
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}
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@ -677,7 +668,7 @@ int putpwent(const struct passwd *__restrict p, FILE *__restrict f)
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int rv = -1;
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if (!p || !f) {
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errno=EINVAL;
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errno = EINVAL;
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} else {
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/* No extra thread locking is needed above what fprintf does. */
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if (fprintf(f, "%s:%s:%lu:%lu:%s:%s:%s\n",
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@ -702,7 +693,7 @@ int putgrent(const struct group *__restrict p, FILE *__restrict f)
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int rv = -1;
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if (!p || !f) { /* Sigh... glibc checks. */
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errno=EINVAL;
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errno = EINVAL;
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} else {
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if (fprintf(f, "%s:%s:%lu:",
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p->gr_name, p->gr_passwd,
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@ -2340,7 +2340,7 @@ int httpd_main(int argc ATTRIBUTE_UNUSED, char **argv)
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#if ENABLE_FEATURE_HTTPD_SETUID
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if (opt & OPT_SETUID) {
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if (!get_uidgid(&ugid, s_ugid, 1))
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bb_error_msg_and_die("unrecognized user[:group] "
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bb_error_msg_and_die("unknown user[:group] "
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"name '%s'", s_ugid);
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}
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#endif
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@ -2389,10 +2389,8 @@ int httpd_main(int argc ATTRIBUTE_UNUSED, char **argv)
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#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
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if (!(opt & OPT_INETD))
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sighup_handler(0);
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else /* do not install HUP handler in inetd mode */
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#endif
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index_page = "index.html";
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parse_conf(default_path_httpd_conf, FIRST_PARSE);
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parse_conf(default_path_httpd_conf, FIRST_PARSE);
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xfunc_error_retval = 0;
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if (opt & OPT_INETD)
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@ -142,15 +142,15 @@
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/* Here's the scoop concerning the user[:group] feature:
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* 1) group is not specified:
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* a) user = root: NO setuid() or setgid() is done
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* b) other: setgid(primary group as found in passwd)
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* initgroups(name, primary group)
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* b) other: initgroups(name, primary group)
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* setgid(primary group as found in passwd)
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* setuid()
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* 2) group is specified:
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* a) user = root: setgid(specified group)
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* NO initgroups()
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* NO setuid()
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* b) other: setgid(specified group)
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* initgroups(name, specified group)
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* b) other: initgroups(name, specified group)
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* setgid(specified group)
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* setuid()
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*/
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@ -1383,9 +1383,8 @@ int inetd_main(int argc ATTRIBUTE_UNUSED, char **argv)
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if (pwd->pw_uid) {
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if (sep->se_group)
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pwd->pw_gid = grp->gr_gid;
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xsetgid(pwd->pw_gid);
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initgroups(pwd->pw_name, pwd->pw_gid);
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xsetuid(pwd->pw_uid);
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/* initgroups, setgid, setuid: */
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change_identity(pwd);
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} else if (sep->se_group) {
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xsetgid(grp->gr_gid);
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setgroups(1, &grp->gr_gid);
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