2 * perm.c - check user permission for at(1)
3 * Copyright (C) 1994 Thomas Koenig
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. The name of the author(s) may not be used to endorse or promote
11 * products derived from this software without specific prior written
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 * $FreeBSD: src/usr.bin/at/perm.c,v 1.9.2.1 2001/08/02 00:55:58 obrien Exp $
26 * $DragonFly: src/usr.bin/at/perm.c,v 1.2 2003/06/17 04:29:25 dillon Exp $
31 #include <sys/types.h>
50 /* Structures and unions */
52 /* Function declarations */
54 static int check_for_user(FILE *fp,const char *name);
58 static int check_for_user(FILE *fp,const char *name)
65 if ((buffer = malloc(len+2)) == NULL)
66 errx(EXIT_FAILURE, "virtual memory exhausted");
68 while(fgets(buffer, len+2, fp) != NULL)
70 if ((strncmp(name, buffer, len) == 0) &&
71 (buffer[len] == '\n'))
81 /* Global functions */
82 int check_permission()
85 uid_t uid = geteuid();
86 struct passwd *pentry;
91 if ((pentry = getpwuid(uid)) == NULL)
92 err(EXIT_FAILURE, "cannot access user database");
96 fp=fopen(PERM_PATH "at.allow","r");
102 return check_for_user(fp, pentry->pw_name);
104 else if (errno == ENOENT)
109 fp=fopen(PERM_PATH "at.deny", "r");
115 return !check_for_user(fp, pentry->pw_name);
117 else if (errno != ENOENT)