Add chkgrp, a small utility for checking for syntax errors in group
files. PR: bin/1387 Suggested-by: Giles Lean <giles@nemeton.com
This commit is contained in:
Dag-Erling Smørgrav
parent
2c8d830407
commit
83bc6a1106
7
usr.sbin/chkgrp/Makefile
Normal file
7
usr.sbin/chkgrp/Makefile
Normal file
@ -0,0 +1,7 @@
|
||||
# $Id$
|
||||
|
||||
PROG= chkgrp
|
||||
SRCS= chkgrp.c
|
||||
MAN8= chkgrp.8
|
||||
|
||||
.include <bsd.prog.mk>
|
||||
70
usr.sbin/chkgrp/chkgrp.8
Normal file
70
usr.sbin/chkgrp/chkgrp.8
Normal file
@ -0,0 +1,70 @@
|
||||
.\" Copyright (c) 1998 Dag-Erling Coïdan Smørgrav
|
||||
.\" 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
|
||||
.\" in this position and unchanged.
|
||||
.\" 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 author may not be used to endorse or promote products
|
||||
.\" derived from this software withough specific prior written permission
|
||||
.\"
|
||||
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
|
||||
.\"
|
||||
.\" $Id$
|
||||
.\"
|
||||
.Dd May 5, 1998
|
||||
.Dt CHKGRP 8
|
||||
.Os
|
||||
.Sh NAME
|
||||
.Nm chkgrp
|
||||
.Nd check the syntax of the group file
|
||||
.Sh SYNOPSIS
|
||||
.Nm chkgrp
|
||||
.Op Ar groupfile
|
||||
.Sh DESCRIPTION
|
||||
.Nm Chkgrp
|
||||
scans the given file or, failing that, the system-wide group file for
|
||||
errors. Specifically, it checks that every non-blank, non-comment
|
||||
entry is composed of four colon-separated fields, that none of them
|
||||
contains whitespace, and that the third field (the group ID) is
|
||||
numeric.
|
||||
.Sh SEE ALSO
|
||||
.Xr getgrent 3 ,
|
||||
.Xr group 5
|
||||
.Sh DIAGNOSTICS
|
||||
For each error found,
|
||||
.Nm chkgrp
|
||||
will print an error message containins the name of the file being
|
||||
scanned and the line number on which the error was found. Otherwise no
|
||||
output is produced.
|
||||
.Pp
|
||||
.Nm Chkgrp
|
||||
returns EX_DATAERR if errors were found in the group file, and EX_OK
|
||||
otherwise.
|
||||
.Sh HISTORY
|
||||
The
|
||||
.Nm
|
||||
command appeared in
|
||||
.Tn FreeBSD
|
||||
3.0
|
||||
.Sh AUTHORS
|
||||
.Nm Chkgrp
|
||||
and this manual page were written by
|
||||
.An Dag-Erling Coïdan Smørgav Aq des@FreeBSD.ORG .
|
||||
.Sh BUGS
|
||||
Should check fields more thoroughly for allowed / disallowed
|
||||
characters, and the range of the group ID.
|
||||
143
usr.sbin/chkgrp/chkgrp.c
Normal file
143
usr.sbin/chkgrp/chkgrp.c
Normal file
@ -0,0 +1,143 @@
|
||||
/*-
|
||||
* Copyright (c) 1998 Dag-Erling Coïdan Smørgrav
|
||||
* 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
|
||||
* in this position and unchanged.
|
||||
* 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 author may not be used to endorse or promote products
|
||||
* derived from this software withough specific prior written permission
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
|
||||
*
|
||||
* $Id$
|
||||
*/
|
||||
|
||||
static const char CVSID[] = "$Id$";
|
||||
|
||||
#include <err.h>
|
||||
#include <ctype.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <sysexits.h>
|
||||
|
||||
extern char *__progname;
|
||||
|
||||
void
|
||||
usage(void)
|
||||
{
|
||||
fprintf(stderr, "usage: %s [groupfile]\n", __progname);
|
||||
exit(EX_USAGE);
|
||||
}
|
||||
|
||||
int
|
||||
main(int argc, char *argv[])
|
||||
{
|
||||
unsigned int len;
|
||||
int n = 0, i, k, e = 0;
|
||||
char *gfn, *line, *f[4], *p;
|
||||
FILE *gf;
|
||||
|
||||
/* check arguments */
|
||||
switch (argc) {
|
||||
case 1:
|
||||
gfn = "/etc/group";
|
||||
break;
|
||||
case 2:
|
||||
gfn = argv[1];
|
||||
break;
|
||||
default:
|
||||
gfn = NULL; /* silence compiler */
|
||||
usage();
|
||||
}
|
||||
|
||||
/* open group file */
|
||||
if ((gf = fopen(gfn, "r")) == NULL)
|
||||
err(EX_IOERR, gfn); /* XXX - is IO_ERR the correct exit code? */
|
||||
|
||||
/* check line by line */
|
||||
while (++n) {
|
||||
if ((line = fgetln(gf, &len)) == NULL)
|
||||
break;
|
||||
while (len && isspace(line[len-1]))
|
||||
len--;
|
||||
|
||||
/* ignore blank lines and comments */
|
||||
for (p = line; p < (line + len); p++)
|
||||
if (!isspace(*p)) break;
|
||||
if (!len || (*p == '#')) {
|
||||
#if 0
|
||||
/* entry is correct, so print it */
|
||||
printf("%*.*s\n", len, len, line);
|
||||
#endif
|
||||
continue;
|
||||
}
|
||||
|
||||
/*
|
||||
* A correct group entry has four colon-separated fields, the third
|
||||
* of which must be entirely numeric and the fourth of which may
|
||||
* be empty.
|
||||
*/
|
||||
for (i = k = 0; k < 4; k++) {
|
||||
for (f[k] = line+i; (i < len) && (line[i] != ':'); i++)
|
||||
/* nothing */ ;
|
||||
if ((k < 3) && (line[i] != ':'))
|
||||
break;
|
||||
line[i++] = 0;
|
||||
}
|
||||
if (k < 4) {
|
||||
warnx("%s: line %d: missing field(s)", gfn, n);
|
||||
e++;
|
||||
continue;
|
||||
}
|
||||
|
||||
/* check if fourth field ended with a colon */
|
||||
if (i < len) {
|
||||
warnx("%s: line %d: too many fields", gfn, n);
|
||||
e++;
|
||||
continue;
|
||||
}
|
||||
|
||||
/* check that none of the fields contain whitespace */
|
||||
for (k = 0; k < 4; k++)
|
||||
if (strcspn(f[k], " \t") != strlen(f[k]))
|
||||
warnx("%s: line %d: field %d contains whitespace",
|
||||
gfn, n, k+1);
|
||||
|
||||
/* check that the GID is numeric */
|
||||
if (strspn(f[2], "0123456789") != strlen(f[2])) {
|
||||
warnx("%s: line %d: GID is not numeric", gfn, n);
|
||||
e++;
|
||||
continue;
|
||||
}
|
||||
|
||||
#if 0
|
||||
/* entry is correct, so print it */
|
||||
printf("%s:%s:%s:%s\n", f[0], f[1], f[2], f[3]);
|
||||
#endif
|
||||
}
|
||||
|
||||
/* check what broke the loop */
|
||||
if (ferror(gf))
|
||||
err(EX_IOERR, "%s: line %d", gfn, n);
|
||||
|
||||
/* done */
|
||||
fclose(gf);
|
||||
exit(e ? EX_DATAERR : EX_OK);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user