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Diffstat (limited to 'libmisc/age.c')
| -rw-r--r-- | libmisc/age.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/libmisc/age.c b/libmisc/age.c new file mode 100644 index 0000000..d10f71b --- /dev/null +++ b/libmisc/age.c @@ -0,0 +1,178 @@ +/* + * SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh + * SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz + * SPDX-FileCopyrightText: 2001 - 2006, Tomasz Kłoczko + * SPDX-FileCopyrightText: 2008 - 2009, Nicolas François + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <config.h> + +#include <sys/types.h> +#include <stdio.h> +#include <time.h> +#include <errno.h> +#include "prototypes.h" +#include "defines.h" +#include "exitcodes.h" +#include <pwd.h> +#include <grp.h> + +#ident "$Id$" + +#ifndef PASSWD_PROGRAM +#define PASSWD_PROGRAM "/bin/passwd" +#endif +/* + * expire - force password change if password expired + * + * expire() calls /bin/passwd to change the user's password + * if it has expired. + */ +int expire (const struct passwd *pw, /*@null@*/const struct spwd *sp) +{ + int status; + pid_t child; + pid_t pid; + + if (NULL == sp) { + return 0; + } + + /* + * See if the user's password has expired, and if so + * force them to change their password. + */ + + status = isexpired (pw, sp); + switch (status) { + case 0: + return 0; + case 1: + (void) fputs (_("Your password has expired."), stdout); + break; + case 2: + (void) fputs (_("Your password is inactive."), stdout); + break; + case 3: + (void) fputs (_("Your login has expired."), stdout); + break; + } + + /* + * Setting the maximum valid period to less than the minimum + * valid period means that the minimum period will never + * occur while the password is valid, so the user can never + * change that password. + */ + + if ((status > 1) || (sp->sp_max < sp->sp_min)) { + (void) puts (_(" Contact the system administrator.")); + exit (EXIT_FAILURE); + } + (void) puts (_(" Choose a new password.")); + (void) fflush (stdout); + + /* + * Close all the files so that unauthorized access won't + * occur. This needs to be done anyway because those files + * might become stale after "passwd" is executed. + */ + + endspent (); + endpwent (); +#ifdef SHADOWGRP + endsgent (); +#endif + endgrent (); + + /* + * Execute the /bin/passwd command. The exit status will be + * examined to see what the result is. If there are any + * errors the routine will exit. This forces the user to + * change their password before being able to use the account. + */ + + pid = fork (); + if (0 == pid) { + int err; + + /* + * Set the UID to be that of the user. This causes + * passwd to work just like it would had they executed + * it from the command line while logged in. + */ +#if defined(HAVE_INITGROUPS) && ! defined(USE_PAM) + if (setup_uid_gid (pw, false) != 0) +#else + if (setup_uid_gid (pw) != 0) +#endif + { + _exit (126); + } + + (void) execl (PASSWD_PROGRAM, PASSWD_PROGRAM, pw->pw_name, (char *) 0); + err = errno; + perror ("Can't execute " PASSWD_PROGRAM); + _exit ((ENOENT == err) ? E_CMD_NOTFOUND : E_CMD_NOEXEC); + } else if ((pid_t) -1 == pid) { + perror ("fork"); + exit (EXIT_FAILURE); + } + + while (((child = wait (&status)) != pid) && (child != (pid_t)-1)); + + if ((child == pid) && (0 == status)) { + return 1; + } + + exit (EXIT_FAILURE); + /*@notreached@*/} + +/* + * agecheck - see if warning is needed for password expiration + * + * agecheck sees how many days until the user's password is going + * to expire and warns the user of the pending password expiration. + */ + +void agecheck (/*@null@*/const struct spwd *sp) +{ + long now = (long) time ((time_t *) 0) / SCALE; + long remain; + + if (NULL == sp) { + return; + } + + /* + * The last, max, and warn fields must be supported or the + * warning period cannot be calculated. + */ + + if ( (-1 == sp->sp_lstchg) + || (-1 == sp->sp_max) + || (-1 == sp->sp_warn)) { + return; + } + + if (0 == sp->sp_lstchg) { + (void) puts (_("You must change your password.")); + return; + } + + remain = sp->sp_lstchg + sp->sp_max - now; + if (remain <= sp->sp_warn) { + remain /= DAY / SCALE; + if (remain > 1) { + (void) printf (_("Your password will expire in %ld days.\n"), + remain); + } else if (1 == remain) { + (void) puts (_("Your password will expire tomorrow.")); + } else if (remain == 0) { + (void) puts (_("Your password will expire today.")); + } + } +} + |