diff options
Diffstat (limited to 'login/login.c')
| -rw-r--r-- | login/login.c | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/login/login.c b/login/login.c deleted file mode 100644 index b8171de83c..0000000000 --- a/login/login.c +++ /dev/null @@ -1,143 +0,0 @@ -/* Copyright (C) 1996-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <assert.h> -#include <errno.h> -#include <limits.h> -#include <string.h> -#include <unistd.h> -#include <stdlib.h> -#include <utmp.h> - - -/* Return the result of ttyname in the buffer pointed to by TTY, which should - be of length BUF_LEN. If it is too long to fit in this buffer, a - sufficiently long buffer is allocated using malloc, and returned in TTY. - 0 is returned upon success, -1 otherwise. */ -static int -tty_name (int fd, char **tty, size_t buf_len) -{ - int rv; /* Return value. 0 = success. */ - char *buf = *tty; /* Buffer for ttyname, initially the user's. */ - - for (;;) - { - char *new_buf; - - if (buf_len) - { - rv = ttyname_r (fd, buf, buf_len); - - if (rv != 0 || memchr (buf, '\0', buf_len)) - /* We either got an error, or we succeeded and the - returned name fit in the buffer. */ - break; - - /* Try again with a longer buffer. */ - buf_len += buf_len; /* Double it */ - } - else - /* No initial buffer; start out by mallocing one. */ - buf_len = 128; /* First time guess. */ - - if (buf != *tty) - /* We've already malloced another buffer at least once. */ - new_buf = realloc (buf, buf_len); - else - new_buf = malloc (buf_len); - if (! new_buf) - { - rv = -1; - __set_errno (ENOMEM); - break; - } - buf = new_buf; - } - - if (rv == 0) - *tty = buf; /* Return buffer to the user. */ - else if (buf != *tty) - free (buf); /* Free what we malloced when returning an error. */ - - return rv; -} - -void -login (const struct utmp *ut) -{ -#ifdef PATH_MAX - char _tty[PATH_MAX + UT_LINESIZE]; -#else - char _tty[512 + UT_LINESIZE]; -#endif - char *tty = _tty; - int found_tty; - const char *ttyp; - struct utmp copy = *ut; - - /* Fill in those fields we supply. */ -#if _HAVE_UT_TYPE - 0 - copy.ut_type = USER_PROCESS; -#endif -#if _HAVE_UT_PID - 0 - copy.ut_pid = getpid (); -#endif - - /* Seek tty. */ - found_tty = tty_name (STDIN_FILENO, &tty, sizeof (_tty)); - if (found_tty < 0) - found_tty = tty_name (STDOUT_FILENO, &tty, sizeof (_tty)); - if (found_tty < 0) - found_tty = tty_name (STDERR_FILENO, &tty, sizeof (_tty)); - - if (found_tty >= 0) - { - /* We only want to insert the name of the tty without path. - But take care of name like /dev/pts/3. */ - if (strncmp (tty, "/dev/", 5) == 0) - ttyp = tty + 5; /* Skip the "/dev/". */ - else - ttyp = basename (tty); - - /* Position to record for this tty. */ - strncpy (copy.ut_line, ttyp, UT_LINESIZE); - - /* Tell that we want to use the UTMP file. */ - if (utmpname (_PATH_UTMP) == 0) - { - /* Open UTMP file. */ - setutent (); - - /* Write the entry. */ - pututline (©); - - /* Close UTMP file. */ - endutent (); - } - - if (tty != _tty) - free (tty); /* Free buffer malloced by tty_name. */ - } - else - /* We provide a default value so that the output does not contain - an random bytes in this field. */ - strncpy (copy.ut_line, "???", UT_LINESIZE); - - /* Update the WTMP file. Here we have to add a new entry. */ - updwtmp (_PATH_WTMP, ©); -} |