From 71e5d196356bf899149ebb310c15bc0350d7c449 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Tue, 30 Mar 1999 18:46:29 +0000 Subject: Update. 1999-03-30 20:59 -0500 Zack Weinberg * login/programs/pt_chown.c: Drop privileges if invoked with arguments. Don't close the master pty. --- login/programs/pt_chown.c | 70 +++++++++++++++++++++++++++++------------------ 1 file changed, 43 insertions(+), 27 deletions(-) (limited to 'login') diff --git a/login/programs/pt_chown.c b/login/programs/pt_chown.c index ee176068f8..4b78e34418 100644 --- a/login/programs/pt_chown.c +++ b/login/programs/pt_chown.c @@ -55,7 +55,7 @@ static struct argp argp = static void print_version (FILE *stream, struct argp_state *state) { - fprintf (stream, "pt_chmod (GNU %s) %s\n", PACKAGE, VERSION); + fprintf (stream, "pt_chown (GNU %s) %s\n", PACKAGE, VERSION); fprintf (stream, gettext ("\ Copyright (C) %s Free Software Foundation, Inc.\n\ This is free software; see the source for copying conditions. There is NO\n\ @@ -95,41 +95,17 @@ Report bugs using the `glibcbug' script to .\n")); } int -main (int argc, char *argv[]) +do_pt_chown (void) { char *pty; - int remaining; struct stat st; struct group *p; gid_t gid; - /* Set locale via LC_ALL. */ - setlocale (LC_ALL, ""); - - /* Set the text message domain. */ - textdomain (PACKAGE); - - /* parse and process arguments. */ - argp_parse (&argp, argc, argv, 0, &remaining, NULL); - - if (remaining < argc) - { - /* We should not be called with any non-option parameters. */ - error (0, 0, gettext ("too many arguments")); - argp_help (&argp, stdout, ARGP_HELP_SEE | ARGP_HELP_EXIT_ERR, - program_invocation_short_name); - exit (EXIT_FAILURE); - } - - /* Check if we are properly installed. */ - if (geteuid () != 0) - error (FAIL_EXEC, 0, gettext ("needs to be installed setuid `root'")); - /* Check that PTY_FILENO is a valid master pseudo terminal. */ pty = ptsname (PTY_FILENO); if (pty == NULL) return errno == EBADF ? FAIL_EBADF : FAIL_EINVAL; - close (PTY_FILENO); /* Check that the returned slave pseudo terminal is a character device. */ @@ -150,5 +126,45 @@ main (int argc, char *argv[]) if (chmod (pty, S_IRUSR|S_IWUSR|S_IWGRP) < 0) return FAIL_EACCES; - exit (EXIT_SUCCESS); + return 0; +} + + +int +main (int argc, char *argv[]) +{ + int remaining; + + /* Normal invocation of this program is with no arguments and + with privileges. + FIXME: Should use capable (CAP_CHOWN|CAP_FOWNER). */ + if (argc == 1 && geteuid () == 0) + return do_pt_chown (); + + /* We aren't going to be using privileges, so drop them right now. */ + setuid (getuid ()); + + /* Set locale via LC_ALL. */ + setlocale (LC_ALL, ""); + + /* Set the text message domain. */ + textdomain (PACKAGE); + + /* parse and process arguments. */ + argp_parse (&argp, argc, argv, 0, &remaining, NULL); + + if (remaining < argc) + { + /* We should not be called with any non-option parameters. */ + error (0, 0, gettext ("too many arguments")); + argp_help (&argp, stdout, ARGP_HELP_SEE | ARGP_HELP_EXIT_ERR, + program_invocation_short_name); + return EXIT_FAILURE; + } + + /* Check if we are properly installed. */ + if (geteuid () != 0) + error (FAIL_EXEC, 0, gettext ("needs to be installed setuid `root'")); + + return EXIT_SUCCESS; } -- cgit v1.2.3