1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */
23*0Sstevel@tonic-gate /* All Rights Reserved */
24*0Sstevel@tonic-gate
25*0Sstevel@tonic-gate
26*0Sstevel@tonic-gate /*
27*0Sstevel@tonic-gate * Copyright (c) 1999 by Sun Microsystems, Inc.
28*0Sstevel@tonic-gate * All rights reserved.
29*0Sstevel@tonic-gate */
30*0Sstevel@tonic-gate
31*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
32*0Sstevel@tonic-gate
33*0Sstevel@tonic-gate /*
34*0Sstevel@tonic-gate * logdir()
35*0Sstevel@tonic-gate *
36*0Sstevel@tonic-gate * This routine does not use the getpwent(3) library routine
37*0Sstevel@tonic-gate * because the latter uses the stdio package. The allocation of
38*0Sstevel@tonic-gate * storage in this package destroys the integrity of the shell's
39*0Sstevel@tonic-gate * storage allocation.
40*0Sstevel@tonic-gate */
41*0Sstevel@tonic-gate
42*0Sstevel@tonic-gate #include <fcntl.h> /* O_RDONLY */
43*0Sstevel@tonic-gate #include <stdlib.h>
44*0Sstevel@tonic-gate #include <unistd.h>
45*0Sstevel@tonic-gate #include <string.h>
46*0Sstevel@tonic-gate
47*0Sstevel@tonic-gate #define BUFSIZ 160
48*0Sstevel@tonic-gate
49*0Sstevel@tonic-gate static char line[BUFSIZ+1];
50*0Sstevel@tonic-gate
51*0Sstevel@tonic-gate static char *
passwdfield(char * p)52*0Sstevel@tonic-gate passwdfield(char *p)
53*0Sstevel@tonic-gate {
54*0Sstevel@tonic-gate while (*p && *p != ':')
55*0Sstevel@tonic-gate ++p;
56*0Sstevel@tonic-gate if (*p)
57*0Sstevel@tonic-gate *p++ = 0;
58*0Sstevel@tonic-gate return (p);
59*0Sstevel@tonic-gate }
60*0Sstevel@tonic-gate
61*0Sstevel@tonic-gate char *
logdir(char * name)62*0Sstevel@tonic-gate logdir(char *name)
63*0Sstevel@tonic-gate {
64*0Sstevel@tonic-gate char *p;
65*0Sstevel@tonic-gate int i, j;
66*0Sstevel@tonic-gate int pwf;
67*0Sstevel@tonic-gate
68*0Sstevel@tonic-gate /* attempt to open the password file */
69*0Sstevel@tonic-gate if ((pwf = open("/etc/passwd", O_RDONLY)) == -1)
70*0Sstevel@tonic-gate return (0);
71*0Sstevel@tonic-gate
72*0Sstevel@tonic-gate /* find the matching password entry */
73*0Sstevel@tonic-gate do {
74*0Sstevel@tonic-gate /* get the next line in the password file */
75*0Sstevel@tonic-gate i = read(pwf, line, BUFSIZ);
76*0Sstevel@tonic-gate for (j = 0; j < i; j++)
77*0Sstevel@tonic-gate if (line[j] == '\n')
78*0Sstevel@tonic-gate break;
79*0Sstevel@tonic-gate /* return a null pointer if the whole file has been read */
80*0Sstevel@tonic-gate if (j >= i)
81*0Sstevel@tonic-gate return (0);
82*0Sstevel@tonic-gate line[++j] = 0; /* terminate the line */
83*0Sstevel@tonic-gate /* point at the next line */
84*0Sstevel@tonic-gate (void) lseek(pwf, (long)(j - i), 1);
85*0Sstevel@tonic-gate p = passwdfield(line); /* get the logname */
86*0Sstevel@tonic-gate } while (*name != *line || /* fast pretest */
87*0Sstevel@tonic-gate strcmp(name, line) != 0);
88*0Sstevel@tonic-gate (void) close(pwf);
89*0Sstevel@tonic-gate
90*0Sstevel@tonic-gate /* skip the intervening fields */
91*0Sstevel@tonic-gate p = passwdfield(p);
92*0Sstevel@tonic-gate p = passwdfield(p);
93*0Sstevel@tonic-gate p = passwdfield(p);
94*0Sstevel@tonic-gate p = passwdfield(p);
95*0Sstevel@tonic-gate
96*0Sstevel@tonic-gate /* return the login directory */
97*0Sstevel@tonic-gate (void) passwdfield(p);
98*0Sstevel@tonic-gate return (p);
99*0Sstevel@tonic-gate }
100