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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/signal.h>
#include <sys/sysmacros.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <locale.h>
#include <errno.h>
#include <unistd.h>
#define ERROR1 "Too many/few fields"
#define ERROR2 "Bad character(s) in logname"
#define ERROR2a "First char in logname not alphabetic"
#define ERROR2b "Logname field NULL"
#define ERROR2c "Logname contains no lower-case letters"
#define ERROR3 "Logname too long/short"
#define ERROR4 "Invalid UID"
#define ERROR5 "Invalid GID"
#define ERROR6 "Login directory not found"
#define ERROR6a "Login directory null"
#define ERROR7 "Optional shell file not found"
static int eflag, code = 0;
static int badc;
static int lc;
static char buf[512];
static void error(char *);
int
main(int argc, char **argv)
{
int delim[512];
char logbuf[512];
FILE *fptr;
struct stat obuf;
uid_t uid;
gid_t gid;
int i, j, colons;
char *pw_file;
struct stat stat_buf;
char *str, *lastc;
(void) setlocale(LC_ALL, "");
#if !defined(TEXT_DOMAIN) /* Should be defined by cc -D */
#define TEXT_DOMAIN "SYS_TEST"
#endif
(void) textdomain(TEXT_DOMAIN);
if (argc == 1)
pw_file = "/etc/passwd";
else
pw_file = argv[1];
if ((fptr = fopen(pw_file, "r")) == NULL) {
(void) fprintf(stderr, gettext("cannot open %s\n"), pw_file);
exit(1);
}
if (fstat(fileno(fptr), &stat_buf) < 0) {
(void) fprintf(stderr, gettext("fstat failed for %s\n"),
pw_file);
(void) fclose(fptr);
exit(1);
}
if (stat_buf.st_size == 0) {
(void) fprintf(stderr, gettext("file %s is empty\n"), pw_file);
(void) fclose(fptr);
exit(1);
}
while (fgets(buf, sizeof (buf), fptr) != NULL) {
colons = 0;
badc = 0;
lc = 0;
eflag = 0;
/* Check that entry is not a nameservice redirection */
if (buf[0] == '+' || buf[0] == '-') {
/*
* Should set flag here to allow special case checking
* in the rest of the code,
* but for now, we'll just ignore this entry.
*/
continue;
}
/* Check number of fields */
for (i = 0; buf[i] != NULL; i++)
if (buf[i] == ':') {
delim[colons] = i;
++colons;
}
if (colons != 6) {
error(ERROR1);
continue;
}
delim[6] = i - 1;
delim[7] = NULL;
/*
* Check the first char is alpha; the rest alphanumeric;
* and that the name does not consist solely of uppercase
* alpha chars
*/
if (buf[0] == ':')
error(ERROR2b);
else if (!isalpha(buf[0]))
error(ERROR2a);
for (i = 0; buf[i] != ':'; i++) {
if (!isalnum(buf[i]) &&
buf[i] != '_' &&
buf[i] != '-' &&
buf[i] != '.')
badc++;
else if (islower(buf[i]))
lc++;
}
if (lc == 0)
error(ERROR2c);
if (badc > 0)
error(ERROR2);
/* Check for valid number of characters in logname */
if (i <= 0 || i > 8)
error(ERROR3);
/* Check that UID is numeric and <= MAXUID */
errno = 0;
str = &buf[delim[1] + 1];
uid = strtol(str, &lastc, 10);
if (lastc != str + (delim[2] - delim[1]) - 1 ||
uid < 0 || uid > MAXUID || errno == ERANGE)
error(ERROR4);
/* Check that GID is numeric and <= MAXUID */
errno = 0;
str = &buf[delim[2] + 1];
gid = strtol(str, &lastc, 10);
if (lastc != str + (delim[3] - delim[2]) - 1 ||
gid < 0 || gid > MAXUID || errno == ERANGE)
error(ERROR5);
/* Check initial working directory */
for (j = 0, i = (delim[4] + 1); i < delim[5]; j++, i++)
logbuf[j] = buf[i];
logbuf[j] = '\0';
if (logbuf[0] == NULL)
error(ERROR6a);
else if ((stat(logbuf, &obuf)) == -1)
error(ERROR6);
/* Check program to use as shell */
if ((buf[(delim[5] + 1)]) != '\n') {
for (j = 0, i = (delim[5] + 1); i < delim[6]; j++, i++)
logbuf[j] = buf[i];
logbuf[j] = '\0';
if (strcmp(logbuf, "*") == 0) /* subsystem login */
continue;
if ((stat(logbuf, &obuf)) == -1)
error(ERROR7);
for (j = 0; j < 512; j++)
logbuf[j] = NULL;
}
}
(void) fclose(fptr);
return (code);
}
/* Error printing routine */
static void
error(char *msg)
{
if (!eflag) {
(void) fprintf(stderr, "\n%s", buf);
code = 1;
++eflag;
}
if (!badc)
(void) fprintf(stderr, "\t%s\n", gettext(msg));
else {
(void) fprintf(stderr, "\t%d %s\n", badc, gettext(msg));
badc = 0;
}
}
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