1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate *
4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate * with the License.
8*7c478bd9Sstevel@tonic-gate *
9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate *
14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate *
20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate */
22*7c478bd9Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */
23*7c478bd9Sstevel@tonic-gate /* All Rights Reserved */
24*7c478bd9Sstevel@tonic-gate
25*7c478bd9Sstevel@tonic-gate
26*7c478bd9Sstevel@tonic-gate /*
27*7c478bd9Sstevel@tonic-gate * Copyright (c) 1999 by Sun Microsystems, Inc.
28*7c478bd9Sstevel@tonic-gate * All rights reserved.
29*7c478bd9Sstevel@tonic-gate */
30*7c478bd9Sstevel@tonic-gate
31*7c478bd9Sstevel@tonic-gate /*
32*7c478bd9Sstevel@tonic-gate * logdir()
33*7c478bd9Sstevel@tonic-gate *
34*7c478bd9Sstevel@tonic-gate * This routine does not use the getpwent(3) library routine
35*7c478bd9Sstevel@tonic-gate * because the latter uses the stdio package. The allocation of
36*7c478bd9Sstevel@tonic-gate * storage in this package destroys the integrity of the shell's
37*7c478bd9Sstevel@tonic-gate * storage allocation.
38*7c478bd9Sstevel@tonic-gate */
39*7c478bd9Sstevel@tonic-gate
40*7c478bd9Sstevel@tonic-gate #include <fcntl.h> /* O_RDONLY */
41*7c478bd9Sstevel@tonic-gate #include <stdlib.h>
42*7c478bd9Sstevel@tonic-gate #include <unistd.h>
43*7c478bd9Sstevel@tonic-gate #include <string.h>
44*7c478bd9Sstevel@tonic-gate
45*7c478bd9Sstevel@tonic-gate #define BUFSIZ 160
46*7c478bd9Sstevel@tonic-gate
47*7c478bd9Sstevel@tonic-gate static char line[BUFSIZ+1];
48*7c478bd9Sstevel@tonic-gate
49*7c478bd9Sstevel@tonic-gate static char *
passwdfield(char * p)50*7c478bd9Sstevel@tonic-gate passwdfield(char *p)
51*7c478bd9Sstevel@tonic-gate {
52*7c478bd9Sstevel@tonic-gate while (*p && *p != ':')
53*7c478bd9Sstevel@tonic-gate ++p;
54*7c478bd9Sstevel@tonic-gate if (*p)
55*7c478bd9Sstevel@tonic-gate *p++ = 0;
56*7c478bd9Sstevel@tonic-gate return (p);
57*7c478bd9Sstevel@tonic-gate }
58*7c478bd9Sstevel@tonic-gate
59*7c478bd9Sstevel@tonic-gate char *
logdir(char * name)60*7c478bd9Sstevel@tonic-gate logdir(char *name)
61*7c478bd9Sstevel@tonic-gate {
62*7c478bd9Sstevel@tonic-gate char *p;
63*7c478bd9Sstevel@tonic-gate int i, j;
64*7c478bd9Sstevel@tonic-gate int pwf;
65*7c478bd9Sstevel@tonic-gate
66*7c478bd9Sstevel@tonic-gate /* attempt to open the password file */
67*7c478bd9Sstevel@tonic-gate if ((pwf = open("/etc/passwd", O_RDONLY)) == -1)
68*7c478bd9Sstevel@tonic-gate return (0);
69*7c478bd9Sstevel@tonic-gate
70*7c478bd9Sstevel@tonic-gate /* find the matching password entry */
71*7c478bd9Sstevel@tonic-gate do {
72*7c478bd9Sstevel@tonic-gate /* get the next line in the password file */
73*7c478bd9Sstevel@tonic-gate i = read(pwf, line, BUFSIZ);
74*7c478bd9Sstevel@tonic-gate for (j = 0; j < i; j++)
75*7c478bd9Sstevel@tonic-gate if (line[j] == '\n')
76*7c478bd9Sstevel@tonic-gate break;
77*7c478bd9Sstevel@tonic-gate /* return a null pointer if the whole file has been read */
78*7c478bd9Sstevel@tonic-gate if (j >= i)
79*7c478bd9Sstevel@tonic-gate return (0);
80*7c478bd9Sstevel@tonic-gate line[++j] = 0; /* terminate the line */
81*7c478bd9Sstevel@tonic-gate /* point at the next line */
82*7c478bd9Sstevel@tonic-gate (void) lseek(pwf, (long)(j - i), 1);
83*7c478bd9Sstevel@tonic-gate p = passwdfield(line); /* get the logname */
84*7c478bd9Sstevel@tonic-gate } while (*name != *line || /* fast pretest */
85*7c478bd9Sstevel@tonic-gate strcmp(name, line) != 0);
86*7c478bd9Sstevel@tonic-gate (void) close(pwf);
87*7c478bd9Sstevel@tonic-gate
88*7c478bd9Sstevel@tonic-gate /* skip the intervening fields */
89*7c478bd9Sstevel@tonic-gate p = passwdfield(p);
90*7c478bd9Sstevel@tonic-gate p = passwdfield(p);
91*7c478bd9Sstevel@tonic-gate p = passwdfield(p);
92*7c478bd9Sstevel@tonic-gate p = passwdfield(p);
93*7c478bd9Sstevel@tonic-gate
94*7c478bd9Sstevel@tonic-gate /* return the login directory */
95*7c478bd9Sstevel@tonic-gate (void) passwdfield(p);
96*7c478bd9Sstevel@tonic-gate return (p);
97*7c478bd9Sstevel@tonic-gate }
98