#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (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 2009 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#
# Copyright (c) 2013 RackTop Systems.
#
# Copyright (c) 2018, Joyent, Inc.

include ../../Makefile.cmd

GROUPADD= 	groupadd
GROUPDEL= 	groupdel
GROUPMOD= 	groupmod

SBINPROG=	$(GROUPADD)   $(GROUPDEL)   $(GROUPMOD)

PROG=		$(SBINPROG)

ADD_OBJ=	groupadd.o    add_group.o   messages.o
DEL_OBJ=	groupdel.o    del_group.o   messages.o
MOD_OBJ=	groupmod.o    mod_group.o   messages.o

OBJECTS=	$(ADD_OBJ)    $(DEL_OBJ)    $(MOD_OBJ)
SRCS=		$(OBJECTS:.o=.c)

LIBDIR=		../lib
LIBUSRGRP=	$(LIBDIR)/lib.a
LOCAL=		../inc
HERE=		.
LINTFLAGS=	-u

INSSBINPROG=	$(SBINPROG:%=$(ROOTUSRSBIN)/%)

CPPFLAGS=	-I$(HERE) -I$(LOCAL) $(CPPFLAGS.master)
FILEMODE= 	0555

# not linted
SMATCH=off

$(GROUPADD) :	OBJS = $(ADD_OBJ)
$(GROUPADD) :	LDLIBS += $(LIBUSRGRP) -lcmdutils

$(GROUPDEL) :	OBJS = $(DEL_OBJ)
$(GROUPDEL) :	LDLIBS += $(LIBUSRGRP)

$(GROUPMOD) :	OBJS = $(MOD_OBJ)
$(GROUPMOD) :	LDLIBS += $(LIBUSRGRP)

all: 		$(PROG)

$(PROG):	$$(OBJS) $(LIBUSRGRP)
	$(LINK.c) $(OBJS) -o $@ $(LDLIBS)
	$(POST_PROCESS)

$(GROUPADD):	$(ADD_OBJ)
$(GROUPMOD):	$(MOD_OBJ)
$(GROUPDEL):	$(DEL_OBJ)

install:	all $(INSSBINPROG)

clean:
	$(RM) $(OBJECTS)

lint:	lint_SRCS

include ../../Makefile.targ
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (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 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
/*	All Rights Reserved	*/

#include	<sys/types.h>
#include	<sys/stat.h>
#include	<stdio.h>
#include	<unistd.h>
#include	<userdefs.h>

#define	GRPTMP		"/etc/gtmp"
#define	GRPBUFSIZ	5120

int
add_group(group, gid)
char *group;	/* name of group to add */
gid_t gid;		/* gid of group to add */
{
	FILE *etcgrp;		/* /etc/group file */
	FILE *etctmp;		/* temp file */
	int o_mask;		/* old umask value */
	int newdone = 0;	/* set true when new entry done */
	struct stat sb;		/* stat buf to copy modes */
	char buf[GRPBUFSIZ];

	if ((etcgrp = fopen(GROUP, "r")) == NULL) {
		return (EX_UPDATE);
	}

	if (fstat(fileno(etcgrp), &sb) < 0) {
		/* If we can't get mode, take a default */
		sb.st_mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH;
	}

	o_mask = umask(077);
	etctmp = fopen(GRPTMP, "w+");
	(void) umask(o_mask);

	if (etctmp == NULL) {
		fclose(etcgrp);
		return (EX_UPDATE);
	}

	if (fchmod(fileno(etctmp), sb.st_mode) != 0 ||
	    fchown(fileno(etctmp), sb.st_uid, sb.st_gid) != 0 ||
	    lockf(fileno(etctmp), F_LOCK, 0) != 0) {
		fclose(etcgrp);
		fclose(etctmp);
		unlink(GRPTMP);
		return (EX_UPDATE);
	}

	while (fgets(buf, GRPBUFSIZ, etcgrp) != NULL) {
		/* Check for NameService reference */
		if (!newdone && (buf[0] == '+' || buf[0] == '-')) {
			(void) fprintf(etctmp, "%s::%u:\n", group, gid);
			newdone = 1;
		}

		fputs(buf, etctmp);
	}


	(void) fclose(etcgrp);

	if (!newdone) {
		(void) fprintf(etctmp, "%s::%u:\n", group, gid);
	}

	if (rename(GRPTMP, GROUP) < 0) {
		fclose(etctmp);
		unlink(GRPTMP);
		return (EX_UPDATE);
	}

	(void) fclose(etctmp);


	return (EX_SUCCESS);
}
/*
 * 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 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved  	*/

#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <ctype.h>
#include <grp.h>
#include <unistd.h>
#include <string.h>
#include <userdefs.h>
#include <stdlib.h>
#include "users.h"
#include "messages.h"

/* lint error-killers: */
int errmsg(int, int);

/* Delete a group from the GROUP file */
int
del_group(char *group)
{
	int deleted;
	FILE *e_fptr, *t_fptr;
	struct group *grpstruct;
	char tname[] = "/etc/gtmp.XXXXXX";
	int fd;
	struct stat sbuf;
	boolean_t haserr;
	int line = 1;

	if ((e_fptr = fopen(GROUP, "r")) == NULL)
		return (EX_UPDATE);

	if (fstat(fileno(e_fptr), &sbuf) != 0)
		return (EX_UPDATE);

	if ((fd = mkstemp(tname)) == -1)
		return (EX_UPDATE);

	if ((t_fptr = fdopen(fd, "w")) == NULL) {
		(void) close(fd);
		(void) unlink(tname);
		return (EX_UPDATE);
	}

	/*
	 * Get ownership and permissions correct
	 */

	if (fchmod(fd, sbuf.st_mode) != 0 ||
	    fchown(fd, sbuf.st_uid, sbuf.st_gid) != 0) {
		(void) fclose(t_fptr);
		(void) unlink(tname);
		return (EX_UPDATE);
	}

	/* loop thru GROUP looking for the one to delete */
	deleted = 0;

	while ((grpstruct = fgetgrent(e_fptr)) != NULL) {

		/* check to see if group is one to delete */
		if (strcmp(grpstruct->gr_name, group) == 0)
			deleted = 1;
		else
			putgrent(grpstruct, t_fptr);
		line++;
	}

	haserr = !feof(e_fptr);

	if (haserr)
		errmsg(M_SYNTAX, line);

	(void) fclose(e_fptr);

	if (fclose(t_fptr) != 0 || haserr) {
		/* GROUP file contains bad entries or write failed. */
		(void) unlink(tname);
		return (EX_UPDATE);
	}

	/* If deleted, update GROUP file */
	if (deleted) {
		if (rename(tname, GROUP) != 0) {
			(void) unlink(tname);
			return (EX_UPDATE);
		}
		return (EX_SUCCESS);
	} else {
		(void) unlink(tname);
		return (EX_NAME_NOT_EXIST);
	}
}
/*
 * 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  	*/

/*
 * Copyright (c) 2013 RackTop Systems.
 */

#include	<sys/types.h>
#include	<sys/param.h>
#include	<stdio.h>
#include	<stdlib.h>
#include	<ctype.h>
#include	<limits.h>
#include	<userdefs.h>
#include	<users.h>
#include	<errno.h>
#include	<libcmdutils.h>
#include	"messages.h"

extern int errmsg();
extern int valid_gid(), add_group();

/*
 *  groupadd [-g gid [-o]] group
 *
 *	This command adds new groups to the system.  Arguments are:
 *
 *	gid - a gid_t less than MAXUID
 *	group - a string of printable characters excluding colon(:) and less
 *		than MAXGLEN characters long.
 */

char *cmdname = "groupadd";

int
main(int argc, char *argv[])
{
	int ch;				/* return from getopt */
	gid_t gid;			/* group id */
	int oflag = 0;	/* flags */
	int rc;
	char *gidstr = NULL;	/* gid from command line */
	char *grpname;			/* group name from command line */
	int warning;

	while ((ch = getopt(argc, argv, "g:o")) != EOF)
		switch (ch) {
			case 'g':
				gidstr = optarg;
				break;
			case 'o':
				oflag++;
				break;
			case '?':
				errmsg(M_AUSAGE);
				exit(EX_SYNTAX);
		}

	if ((oflag && !gidstr) || optind != argc - 1) {
		errmsg(M_AUSAGE);
		exit(EX_SYNTAX);
	}

	grpname = argv[optind];

	switch (valid_gname(grpname, NULL, &warning)) {
	case INVALID:
		errmsg(M_GRP_INVALID, grpname);
		exit(EX_BADARG);
		/*NOTREACHED*/
	case NOTUNIQUE:
		errmsg(M_GRP_USED, grpname);
		exit(EX_NAME_EXISTS);
		/*NOTREACHED*/
	}
	if (warning)
		warningmsg(warning, grpname);

	if (gidstr) {
		/* Given a gid string - validate it */
		char *ptr;

		errno = 0;
		gid = (gid_t)strtol(gidstr, &ptr, 10);

		if (*ptr || errno == ERANGE) {
			errmsg(M_GID_INVALID, gidstr);
			exit(EX_BADARG);
		}

		switch (valid_gid(gid, NULL)) {
		case RESERVED:
			errmsg(M_RESERVED, gid);
			break;

		case NOTUNIQUE:
			if (!oflag) {
				errmsg(M_GRP_USED, gidstr);
				exit(EX_ID_EXISTS);
			}
			break;

		case INVALID:
			errmsg(M_GID_INVALID, gidstr);
			exit(EX_BADARG);

		case TOOBIG:
			errmsg(M_TOOBIG, gid);
			exit(EX_BADARG);

		}

	} else {

		if (findnextgid(DEFRID+1, MAXUID, &gid) != 0) {
			errmsg(M_GID_INVALID, "default id");
			exit(EX_ID_EXISTS);
		}

	}

	if ((rc = add_group(grpname, gid)) != EX_SUCCESS)
		errmsg(M_UPDATE, "created");

	return (rc);
}
/*
 * 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  	*/

#include <sys/types.h>
#include <stdio.h>
#include <userdefs.h>
#include "messages.h"

/*
 *  groupdel group
 *
 *	This command deletes groups from the system.  Arguments are:
 *
 *	group - a character string group name
 */

char *cmdname = "groupdel";

extern void errmsg(), exit();
extern int del_group();

int
main(int argc, char **argv)
{
	char *group;		/* group name from command line */
	int retval = 0;

	if (argc != 2) {
		errmsg(M_DUSAGE);
		exit(EX_SYNTAX);
	}

	group = argv[1];

	switch (retval = del_group(group)) {
	case EX_UPDATE:
		errmsg(M_UPDATE, "deleted");
		break;
	case EX_NAME_NOT_EXIST:
		errmsg(M_NO_GROUP, group);
		break;
	}

	return (retval);
}
/*
 * 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  	*/

#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <limits.h>
#include <userdefs.h>
#include <users.h>
#include <errno.h>
#include "messages.h"

/*
 *  groupmod -g gid [-o] | -n name group
 *
 *	This command modifies groups on the system.  Arguments are:
 *
 *	gid - a gid_t less than UID_MAX
 *	name - a string of printable characters excluding colon (:) and less
 *		than MAXGLEN characters long.
 *	group - a string of printable characters excluding colon(:) and less
 *		than MAXGLEN characters long.
 */

extern int valid_gid(), mod_group();
extern void errmsg();

char *cmdname = "groupmod";

int
main(int argc, char *argv[])
{
	int ch;				/* return from getopt */
	gid_t gid;			/* group id */
	int oflag = 0;			/* flags */
	int valret;			/* return from valid_gid() */
	char *gidstr = NULL;		/* gid from command line */
	char *newname = NULL;		/* new group name with -n option */
	char *grpname;			/* group name from command line */
	int warning;

	oflag = 0;	/* flags */

	while ((ch = getopt(argc, argv, "g:on:")) != EOF)  {
		switch (ch) {
			case 'g':
				gidstr = optarg;
				break;
			case 'o':
				oflag++;
				break;
			case 'n':
				newname = optarg;
				break;
			case '?':
				errmsg(M_MUSAGE);
				exit(EX_SYNTAX);
		}
	}

	if ((oflag && !gidstr) || optind != argc - 1) {
		errmsg(M_MUSAGE);
		exit(EX_SYNTAX);
	}

	grpname = argv[optind];

	if (gidstr) {
		/* convert gidstr to integer */
		char *ptr;

		errno = 0;
		gid = (gid_t)strtol(gidstr, &ptr, 10);

		if (*ptr || errno == ERANGE) {
			errmsg(M_GID_INVALID, gidstr);
			exit(EX_BADARG);
		}

		switch (valid_gid(gid, NULL)) {
		case RESERVED:
			errmsg(M_RESERVED, gid);
			break;

		case NOTUNIQUE:
			if (!oflag) {
				errmsg(M_GRP_USED, gidstr);
				exit(EX_ID_EXISTS);
			}
			break;

		case INVALID:
			errmsg(M_GID_INVALID, gidstr);
			exit(EX_BADARG);
			/*NOTREACHED*/

		case TOOBIG:
			errmsg(M_TOOBIG, gid);
			exit(EX_BADARG);
			/*NOTREACHED*/

		}

	} else gid = -1;

	if (newname) {
		switch (valid_gname(newname, NULL, &warning)) {
		case INVALID:
			errmsg(M_GRP_INVALID, newname);
			exit(EX_BADARG);
		case NOTUNIQUE:
			errmsg(M_GRP_USED, newname);
			exit(EX_NAME_EXISTS);
		}
		if (warning)
			warningmsg(warning, newname);
	}

	if ((valret = mod_group(grpname, gid, newname)) != EX_SUCCESS) {
		if (valret == EX_NAME_NOT_EXIST)
			errmsg(M_NO_GROUP, grpname);
		else
			errmsg(M_UPDATE, "modified");
	}

	return (valret);
}
/*
 * 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 2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */
/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved  	*/

char *errmsgs[] = {
	"WARNING: gid %ld is reserved.\n",
	"ERROR: invalid syntax.\nusage: groupadd [-g gid [-o]] group\n",
	"ERROR: invalid syntax.\nusage: groupdel group\n",
	"ERROR: invalid syntax.\nusage: groupmod -g gid [-o] | -n name group\n",
	"ERROR: Cannot update system files - group cannot be %s.\n",
	"ERROR: %s is not a valid group id.  Choose another.\n",
	"ERROR: %s is already in use.  Choose another.\n",
	"ERROR: %s is not a valid group name.  Choose another.\n",
	"ERROR: %s does not exist.\n",
	"ERROR: Group id %ld is too big.  Choose another.\n",
	"ERROR: Permission denied.\n",
	"ERROR: Syntax error in group file at line %d.\n",
};

int lasterrmsg = sizeof (errmsgs) / sizeof (char *);
/*
 * 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 2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */
/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved  	*/

/* WARNING: gid %d is reserved.\n */
#define	M_RESERVED		0

/* ERROR: invalid syntax.\nusage:  groupadd [-g gid [-o]] group\n */
#define	M_AUSAGE		1

/* ERROR: invalid syntax.\nusage:  groupdel group\n */
#define	M_DUSAGE		2

/* ERROR: invalid syntax.\nusage:  groupmod -g gid [-o] | -n name group\n */
#define	M_MUSAGE		3

/* ERROR: Cannot update system files - group cannot be %s.\n */
#define	M_UPDATE		4

/* ERROR: %s is not a valid group id.  Choose another.\n */
#define	M_GID_INVALID	5

/* ERROR: %s is already in use.  Choose another.\n */
#define	M_GRP_USED	6

/* ERROR: %s is not a valid group name.  Choose another.\n */
#define	M_GRP_INVALID	7

/* ERROR: %s does not exist.\n */
#define	M_NO_GROUP	8

/* ERROR: Group id %d is too big.  Choose another.\n */
#define	M_TOOBIG	9

/* ERROR: Permission denied.\n */
#define	M_PERM_DENIED	10

/* ERROR: Syntax error in group file at line %d.\n */
#define	M_SYNTAX	11
/*
 * 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 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved  	*/

#include <sys/types.h>
#include <stdio.h>
#include <ctype.h>
#include <grp.h>
#include <sys/stat.h>
#include <unistd.h>
#include <userdefs.h>
#include <strings.h>
#include <stdlib.h>
#include "users.h"
#include "messages.h"

/* lint error-killers: */
void errmsg(int, int);

/* Modify group to new gid and/or new name */
int
mod_group(char *group, gid_t gid, char *newgroup)
{
	int modified = 0;
	int fd;
	char tname[] = "/etc/gtmp.XXXXXX";
	FILE *e_fptr, *t_fptr;
	struct group *g_ptr;
	struct stat sbuf;
	boolean_t haserr;
	int line = 1;

	if ((e_fptr = fopen(GROUP, "r")) == NULL)
		return (EX_UPDATE);

	if (fstat(fileno(e_fptr), &sbuf) != 0)
		return (EX_UPDATE);

	if ((fd = mkstemp(tname)) == -1)
		return (EX_UPDATE);

	if ((t_fptr = fdopen(fd, "w")) == NULL) {
		(void) close(fd);
		(void) unlink(tname);
		return (EX_UPDATE);
	}

	/*
	 * Get ownership and permissions correct
	 */

	if (fchmod(fd, sbuf.st_mode) != 0 ||
	    fchown(fd, sbuf.st_uid, sbuf.st_gid) != 0) {
		(void) fclose(t_fptr);
		(void) unlink(tname);
		return (EX_UPDATE);
	}

	while ((g_ptr = fgetgrent(e_fptr)) != NULL) {

		/* check to see if group is one to modify */
		if (strcmp(g_ptr->gr_name, group) == 0) {
			if (newgroup != NULL)
				g_ptr->gr_name = newgroup;
			if (gid != -1)
				g_ptr->gr_gid = gid;
			modified++;
		}
		putgrent(g_ptr, t_fptr);
		line++;
	}

	haserr = !feof(e_fptr);
	if (haserr)
		errmsg(M_SYNTAX, line);

	(void) fclose(e_fptr);

	if (fclose(t_fptr) != 0 || haserr) {
		/* GROUP file contains bad entries or write failed. */
		(void) unlink(tname);
		return (EX_UPDATE);
	}

	if (modified) {
		if (rename(tname, GROUP) != 0) {
			(void) unlink(tname);
			return (EX_UPDATE);
		}
		return (EX_SUCCESS);
	} else {
		(void) unlink(tname);
		return (EX_NAME_NOT_EXIST);
	}
}