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Diffstat (limited to '')
| -rw-r--r-- | libmisc/hushed.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/libmisc/hushed.c b/libmisc/hushed.c new file mode 100644 index 0000000..b71b99c --- /dev/null +++ b/libmisc/hushed.c @@ -0,0 +1,100 @@ +/* + * Copyright (c) 1991 - 1993, Julianne Frances Haugh + * Copyright (c) 1991 - 1993, Chip Rosenthal + * Copyright (c) 1996 - 2000, Marek Michałkiewicz + * Copyright (c) 2003 - 2005, Tomasz Kłoczko + * Copyright (c) 2008 - 2010, Nicolas François + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the copyright holders or contributors may not be used to + * endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <config.h> + +#ident "$Id$" + +#include <sys/types.h> +#include <stdio.h> +#include <pwd.h> +#include "defines.h" +#include "prototypes.h" +#include "getdef.h" +/* + * hushed - determine if a user receives login messages + * + * Look in the hushed-logins file (or user's home directory) to see + * if the user is to receive the login-time messages. + */ +bool hushed (const char *username) +{ + struct passwd *pw; + const char *hushfile; + char buf[BUFSIZ]; + bool found; + FILE *fp; + + /* + * Get the name of the file to use. If this option is not + * defined, default to a noisy login. + */ + + hushfile = getdef_str ("HUSHLOGIN_FILE"); + if (NULL == hushfile) { + return false; + } + + pw = getpwnam (username); + if (NULL == pw) { + return false; + } + + /* + * If this is not a fully rooted path then see if the + * file exists in the user's home directory. + */ + + if (hushfile[0] != '/') { + (void) snprintf (buf, sizeof (buf), "%s/%s", pw->pw_dir, hushfile); + return (access (buf, F_OK) == 0); + } + + /* + * If this is a fully rooted path then go through the file + * and see if this user, or its shell is in there. + */ + + fp = fopen (hushfile, "r"); + if (NULL == fp) { + return false; + } + for (found = false; !found && (fgets (buf, (int) sizeof buf, fp) == buf);) { + buf[strlen (buf) - 1] = '\0'; + found = (strcmp (buf, pw->pw_shell) == 0) || + (strcmp (buf, pw->pw_name) == 0); + } + (void) fclose (fp); + return found; +} + |