Merge sync of head

10 files changed, 214 insertions, 263 deletions

diff --git a/chpass/Makefile b/chpass/Makefile
index cf3acc6..9b3e878 100644
--- a/chpass/Makefile
+++ b/chpass/Makefile
@@ -16,11 +16,9 @@ CFLAGS+= -DYP
 #CFLAGS+=-DRESTRICT_FULLNAME_CHANGE
 CFLAGS+=-I${.CURDIR}/../../usr.sbin/pwd_mkdb -I${.CURDIR}/../../lib/libc/gen -I.
 
-DPADD=	${LIBCRYPT} ${LIBUTIL}
-LDADD=	-lcrypt -lutil
+LIBADD=	crypt util
 .if ${MK_NIS} != "no"
-DPADD+=	${LIBYPCLNT}
-LDADD+=	-lypclnt
+LIBADD+=	ypclnt
 .endif 
 
 LINKS=	${BINDIR}/chpass ${BINDIR}/chfn
diff --git a/libutil/gr_util.c b/libutil/gr_util.c
index 465efd9..b0b0b36 100644
--- a/libutil/gr_util.c
+++ b/libutil/gr_util.c
@@ -351,8 +351,6 @@ gr_fini(void)
 int
 gr_equal(const struct group *gr1, const struct group *gr2)
 {
-	int gr1_ndx;
-	int gr2_ndx;
 
 	/* Check that the non-member information is the same. */
 	if (gr1->gr_name == NULL || gr2->gr_name == NULL) {
@@ -368,7 +366,8 @@ gr_equal(const struct group *gr1, const struct group *gr2)
 	if (gr1->gr_gid != gr2->gr_gid)
 		return (false);
 
-	/* Check all members in both groups.
+	/*
+	 * Check all members in both groups.
 	 * getgrnam can return gr_mem with a pointer to NULL.
 	 * gr_dup and gr_add strip out this superfluous NULL, setting
 	 * gr_mem to NULL for no members.
@@ -376,22 +375,18 @@ gr_equal(const struct group *gr1, const struct group *gr2)
 	if (gr1->gr_mem != NULL && gr2->gr_mem != NULL) {
 		int i;
 
-		for (i = 0; gr1->gr_mem[i] != NULL; i++) {
+		for (i = 0;
+		    gr1->gr_mem[i] != NULL && gr2->gr_mem[i] != NULL; i++) {
 			if (strcmp(gr1->gr_mem[i], gr2->gr_mem[i]) != 0)
 				return (false);
 		}
-	}
-	/* Count number of members in both structs */
-	gr2_ndx = 0;
-	if (gr2->gr_mem != NULL)
-		for(; gr2->gr_mem[gr2_ndx] != NULL; gr2_ndx++)
-			/* empty */;
-	gr1_ndx = 0;
-	if (gr1->gr_mem != NULL)
-		for(; gr1->gr_mem[gr1_ndx] != NULL; gr1_ndx++)
-			/* empty */;
-	if (gr1_ndx != gr2_ndx)
+		if (gr1->gr_mem[i] != NULL || gr2->gr_mem[i] != NULL)
+			return (false);
+	} else if (gr1->gr_mem != NULL && gr1->gr_mem[0] != NULL) {
 		return (false);
+	} else if (gr2->gr_mem != NULL && gr2->gr_mem[0] != NULL) {
+		return (false);
+	}
 
 	return (true);
 }
diff --git a/pw/Makefile b/pw/Makefile
index 8c5acf9..69953da 100644
--- a/pw/Makefile
+++ b/pw/Makefile
@@ -8,8 +8,7 @@ SRCS=	pw.c pw_conf.c pw_user.c pw_group.c pw_log.c pw_nis.c pw_vpw.c \
 
 WARNS?=	2
 
-DPADD=	${LIBCRYPT} ${LIBUTIL}
-LDADD=	-lcrypt -lutil
+LIBADD=	crypt util sbuf
 
 .include <src.opts.mk>
 
diff --git a/pw/fileupd.c b/pw/fileupd.c
index 7df4bb1..dc32712 100644
--- a/pw/fileupd.c
+++ b/pw/fileupd.c
@@ -29,32 +29,11 @@ static const char rcsid[] =
   "$FreeBSD$";
 #endif /* not lint */
 
-#include <stdio.h>
-#include <fcntl.h>
 #include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/param.h>
-#include <errno.h>
-#include <unistd.h>
 
 #include "pwupd.h"
 
 int
-extendline(char **buf, int * buflen, int needed)
-{
-	if (needed > *buflen) {
-		char	*tmp = realloc(*buf, needed);
-		if (tmp == NULL)
-			return -1;
-		*buf = tmp;
-		*buflen = needed;
-	}
-	return *buflen;
-}
-
-int
 extendarray(char ***buf, int * buflen, int needed)
 {
 	if (needed > *buflen) {
diff --git a/pw/grupd.c b/pw/grupd.c
index 3f78e95..74cc390 100644
--- a/pw/grupd.c
+++ b/pw/grupd.c
@@ -35,10 +35,6 @@ static const char rcsid[] =
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
-#include <stdarg.h>
-#include <sys/types.h>
-#include <sys/stat.h>
 #include <sys/param.h>
 
 #include "pwupd.h"
diff --git a/pw/pw_conf.c b/pw/pw_conf.c
index 1289b3e..99d3e8f 100644
--- a/pw/pw_conf.c
+++ b/pw/pw_conf.c
@@ -29,9 +29,12 @@ static const char rcsid[] =
   "$FreeBSD$";
 #endif /* not lint */
 
+#include <sys/types.h>
+#include <sys/sbuf.h>
 #include <string.h>
 #include <ctype.h>
 #include <fcntl.h>
+#include <err.h>
 
 #include "pw.h"
 
@@ -209,19 +212,16 @@ boolean_str(int val)
 char           *
 newstr(char const * p)
 {
-	char           *q = NULL;
+	char	*q;
 
-	if ((p = unquote(p)) != NULL) {
-		int             l = strlen(p) + 1;
+	if ((p = unquote(p)) == NULL)
+		return (NULL);
 
-		if ((q = malloc(l)) != NULL)
-			memcpy(q, p, l);
-	}
-	return q;
-}
-
-#define LNBUFSZ 1024
+	if ((q = strdup(p)) == NULL)
+		err(1, "strdup()");
 
+	return (q);
+}
 
 struct userconf *
 read_userconfig(char const * file)
@@ -234,8 +234,10 @@ read_userconfig(char const * file)
 	buf = NULL;
 	linecap = 0;
 
-	extendarray(&config.groups, &config.numgroups, 200);
-	memset(config.groups, 0, config.numgroups * sizeof(char *));
+	config.numgroups = 200;
+	config.groups = calloc(config.numgroups, sizeof(char *));
+	if (config.groups == NULL)
+		err(1, "calloc()");
 	if (file == NULL)
 		file = _PATH_PW_CONF;
 
@@ -366,138 +368,132 @@ int
 write_userconfig(char const * file)
 {
 	int             fd;
+	int             i, j;
+	struct sbuf	*buf;
+	FILE           *fp;
 
 	if (file == NULL)
 		file = _PATH_PW_CONF;
 
-	if ((fd = open(file, O_CREAT | O_RDWR | O_TRUNC | O_EXLOCK, 0644)) != -1) {
-		FILE           *fp;
+	if ((fd = open(file, O_CREAT|O_RDWR|O_TRUNC|O_EXLOCK, 0644)) == -1)
+		return (0);
 
-		if ((fp = fdopen(fd, "w")) == NULL)
-			close(fd);
-		else {
-			int             i, j, k;
-			int		len = LNBUFSZ;
-			char           *buf = malloc(len);
-
-			for (i = _UC_NONE; i < _UC_FIELDS; i++) {
-				int             quote = 1;
-				char const     *val = buf;
-
-				*buf = '\0';
-				switch (i) {
-				case _UC_DEFAULTPWD:
-					val = boolean_str(config.default_password);
-					break;
-				case _UC_REUSEUID:
-					val = boolean_str(config.reuse_uids);
-					break;
-				case _UC_REUSEGID:
-					val = boolean_str(config.reuse_gids);
-					break;
-				case _UC_NISPASSWD:
-					val = config.nispasswd ? config.nispasswd : "";
-					quote = 0;
-					break;
-				case _UC_DOTDIR:
-					val = config.dotdir ? config.dotdir : boolean_str(0);
-					break;
-				case _UC_NEWMAIL:
-					val = config.newmail ? config.newmail : boolean_str(0);
-					break;
-				case _UC_LOGFILE:
-					val = config.logfile ? config.logfile : boolean_str(0);
-					break;
-				case _UC_HOMEROOT:
-					val = config.home;
-					break;
-				case _UC_HOMEMODE:
-					sprintf(buf, "%04o", config.homemode);
-					quote = 0;
-					break;
-				case _UC_SHELLPATH:
-					val = config.shelldir;
-					break;
-				case _UC_SHELLS:
-					for (j = k = 0; j < _UC_MAXSHELLS && system_shells[j] != NULL; j++) {
-						char	lbuf[64];
-						int	l = snprintf(lbuf, sizeof lbuf, "%s\"%s\"", k ? "," : "", system_shells[j]);
-						if (l < 0)
-							l = 0;
-						if (l + k + 1 < len || extendline(&buf, &len, len + LNBUFSZ) != -1) {
-							strcpy(buf + k, lbuf);
-							k += l;
-						}
-					}
-					quote = 0;
-					break;
-				case _UC_DEFAULTSHELL:
-					val = config.shell_default ? config.shell_default : bourne_shell;
-					break;
-				case _UC_DEFAULTGROUP:
-					val = config.default_group ? config.default_group : "";
-					break;
-				case _UC_EXTRAGROUPS:
-					extendarray(&config.groups, &config.numgroups, 200);
-					for (j = k = 0; j < config.numgroups && config.groups[j] != NULL; j++) {
-						char	lbuf[64];
-						int	l = snprintf(lbuf, sizeof lbuf, "%s\"%s\"", k ? "," : "", config.groups[j]);
-						if (l < 0)
-							l = 0;
-						if (l + k + 1 < len || extendline(&buf, &len, len + 1024) != -1) {
-							strcpy(buf + k, lbuf);
-							k +=  l;
-						}
-					}
-					quote = 0;
-					break;
-				case _UC_DEFAULTCLASS:
-					val = config.default_class ? config.default_class : "";
-					break;
-				case _UC_MINUID:
-					sprintf(buf, "%lu", (unsigned long) config.min_uid);
-					quote = 0;
-					break;
-				case _UC_MAXUID:
-					sprintf(buf, "%lu", (unsigned long) config.max_uid);
-					quote = 0;
-					break;
-				case _UC_MINGID:
-					sprintf(buf, "%lu", (unsigned long) config.min_gid);
-					quote = 0;
-					break;
-				case _UC_MAXGID:
-					sprintf(buf, "%lu", (unsigned long) config.max_gid);
-					quote = 0;
-					break;
-				case _UC_EXPIRE:
-					sprintf(buf, "%d", config.expire_days);
-					quote = 0;
-					break;
-				case _UC_PASSWORD:
-					sprintf(buf, "%d", config.password_days);
-					quote = 0;
-					break;
-				case _UC_NONE:
-					break;
-				}
+	if ((fp = fdopen(fd, "w")) == NULL) {
+		close(fd);
+		return (0);
+	}
+			
+	buf = sbuf_new_auto();
+	for (i = _UC_NONE; i < _UC_FIELDS; i++) {
+		int             quote = 1;
+
+		sbuf_clear(buf);
+		switch (i) {
+		case _UC_DEFAULTPWD:
+			sbuf_cat(buf, boolean_str(config.default_password));
+			break;
+		case _UC_REUSEUID:
+			sbuf_cat(buf, boolean_str(config.reuse_uids));
+			break;
+		case _UC_REUSEGID:
+			sbuf_cat(buf, boolean_str(config.reuse_gids));
+			break;
+		case _UC_NISPASSWD:
+			sbuf_cat(buf, config.nispasswd ?  config.nispasswd :
+			    "");
+			quote = 0;
+			break;
+		case _UC_DOTDIR:
+			sbuf_cat(buf, config.dotdir ?  config.dotdir :
+			    boolean_str(0));
+			break;
+		case _UC_NEWMAIL:
+			sbuf_cat(buf, config.newmail ?  config.newmail :
+			    boolean_str(0));
+			break;
+		case _UC_LOGFILE:
+			sbuf_cat(buf, config.logfile ?  config.logfile :
+			    boolean_str(0));
+			break;
+		case _UC_HOMEROOT:
+			sbuf_cat(buf, config.home);
+			break;
+		case _UC_HOMEMODE:
+			sbuf_printf(buf, "%04o", config.homemode);
+			quote = 0;
+			break;
+		case _UC_SHELLPATH:
+			sbuf_cat(buf, config.shelldir);
+			break;
+		case _UC_SHELLS:
+			for (j = 0; j < _UC_MAXSHELLS &&
+			    system_shells[j] != NULL; j++)
+				sbuf_printf(buf, "%s\"%s\"", j ?
+				    "," : "", system_shells[j]);
+			quote = 0;
+			break;
+		case _UC_DEFAULTSHELL:
+			sbuf_cat(buf, config.shell_default ?
+			    config.shell_default : bourne_shell);
+			break;
+		case _UC_DEFAULTGROUP:
+			sbuf_cat(buf, config.default_group ?
+			    config.default_group : "");
+			break;
+		case _UC_EXTRAGROUPS:
+			for (j = 0; j < config.numgroups &&
+			    config.groups[j] != NULL; j++)
+				sbuf_printf(buf, "%s\"%s\"", j ?
+				    "," : "", config.groups[j]);
+			quote = 0;
+			break;
+		case _UC_DEFAULTCLASS:
+			sbuf_cat(buf, config.default_class ?
+			    config.default_class : "");
+			break;
+		case _UC_MINUID:
+			sbuf_printf(buf, "%lu", (unsigned long) config.min_uid);
+			quote = 0;
+			break;
+		case _UC_MAXUID:
+			sbuf_printf(buf, "%lu", (unsigned long) config.max_uid);
+			quote = 0;
+			break;
+		case _UC_MINGID:
+			sbuf_printf(buf, "%lu", (unsigned long) config.min_gid);
+			quote = 0;
+			break;
+		case _UC_MAXGID:
+			sbuf_printf(buf, "%lu", (unsigned long) config.max_gid);
+			quote = 0;
+			break;
+		case _UC_EXPIRE:
+			sbuf_printf(buf, "%d", config.expire_days);
+			quote = 0;
+			break;
+		case _UC_PASSWORD:
+			sbuf_printf(buf, "%d", config.password_days);
+			quote = 0;
+			break;
+		case _UC_NONE:
+			break;
+		}
+		sbuf_finish(buf);
 
-				if (comments[i])
-					fputs(comments[i], fp);
+		if (comments[i])
+			fputs(comments[i], fp);
 
-				if (*kwds[i]) {
-					if (quote)
-						fprintf(fp, "%s = \"%s\"\n", kwds[i], val);
-					else
-						fprintf(fp, "%s = %s\n", kwds[i], val);
+		if (*kwds[i]) {
+			if (quote)
+				fprintf(fp, "%s = \"%s\"\n", kwds[i],
+				    sbuf_data(buf));
+			else
+				fprintf(fp, "%s = %s\n", kwds[i], sbuf_data(buf));
 #if debugging
-					printf("WROTE: %s = %s\n", kwds[i], val);
+			printf("WROTE: %s = %s\n", kwds[i], sbuf_data(buf));
 #endif
-				}
-			}
-			free(buf);
-			return fclose(fp) != EOF;
 		}
 	}
-	return 0;
+	sbuf_delete(buf);
+	return (fclose(fp) != EOF);
 }
diff --git a/pw/pw_nis.c b/pw/pw_nis.c
index 918fc30..c786cc7 100644
--- a/pw/pw_nis.c
+++ b/pw/pw_nis.c
@@ -29,9 +29,6 @@ static const char rcsid[] =
   "$FreeBSD$";
 #endif /* not lint */
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
 #include <sys/types.h>
 #include <err.h>
 #include <pwd.h>
diff --git a/pw/pw_user.c b/pw/pw_user.c
index 483148a..b058aab 100644
--- a/pw/pw_user.c
+++ b/pw/pw_user.c
@@ -40,7 +40,6 @@ static const char rcsid[] =
 #include <sys/types.h>
 #include <sys/time.h>
 #include <sys/resource.h>
-#include <unistd.h>
 #include <login_cap.h>
 #include <pwd.h>
 #include <grp.h>
@@ -185,8 +184,7 @@ pw_user(struct userconf * cnf, int mode, struct cargs * args)
 			 * But we create a symlink from cnf->home -> "/usr" -> cnf->home
 			 */
 			if (strchr(cnf->home+1, '/') == NULL) {
-				strcpy(dbuf, "/usr");
-				strncat(dbuf, cnf->home, MAXPATHLEN-5);
+				snprintf(dbuf, MAXPATHLEN, "/usr%s", cnf->home);
 				if (mkdir(dbuf, _DEF_DIRMODE) != -1 || errno == EEXIST) {
 					chown(dbuf, 0, 0);
 					/*
@@ -364,11 +362,9 @@ pw_user(struct userconf * cnf, int mode, struct cargs * args)
 		if (mode == M_LOCK) {
 			if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) == 0)
 				errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name);
-			passtmp = malloc(strlen(pwd->pw_passwd) + sizeof(locked_str));
+			asprintf(&passtmp, "%s%s", locked_str, pwd->pw_passwd);
 			if (passtmp == NULL)	/* disaster */
 				errx(EX_UNAVAILABLE, "out of memory");
-			strcpy(passtmp, locked_str);
-			strcat(passtmp, pwd->pw_passwd);
 			pwd->pw_passwd = passtmp;
 			edited = 1;
 		} else if (mode == M_UNLOCK) {
@@ -401,7 +397,7 @@ pw_user(struct userconf * cnf, int mode, struct cargs * args)
 				 */
 				snprintf(file, sizeof(file), "/var/cron/tabs/%s", pwd->pw_name);
 				if (access(file, F_OK) == 0) {
-					sprintf(file, "crontab -u %s -r", pwd->pw_name);
+					snprintf(file, sizeof(file), "crontab -u %s -r", pwd->pw_name);
 					system(file);
 				}
 			}
@@ -409,7 +405,7 @@ pw_user(struct userconf * cnf, int mode, struct cargs * args)
 			 * Save these for later, since contents of pwd may be
 			 * invalidated by deletion
 			 */
-			sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
+			snprintf(file, sizeof(file), "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 			strlcpy(home, pwd->pw_dir, sizeof(home));
 			gr = GETGRGID(pwd->pw_gid);
 			if (gr != NULL)
@@ -815,7 +811,7 @@ pw_user(struct userconf * cnf, int mode, struct cargs * args)
 	 */
 	if (mode == M_ADD) {
 		if (!PWALTDIR()) {
-			sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
+			snprintf(line, sizeof(line), "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 			close(open(line, O_RDWR | O_CREAT, 0600));	/* Preserve contents &
 									 * mtime */
 			chown(line, pwd->pw_uid, pwd->pw_gid);
@@ -959,7 +955,7 @@ pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer
 		 * function will happily handle that case for us and exit.
 		 */
 		if (GETGRGID(prefer) == NULL) {
-			sprintf(tmp, "%lu", (unsigned long) prefer);
+			snprintf(tmp, sizeof(tmp), "%u", prefer);
 			addarg(&grpargs, 'g', tmp);
 		}
 		if (getarg(args, 'N'))
@@ -1022,17 +1018,16 @@ static char    *
 pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user)
 {
 	struct carg    *arg = getarg(args, 'd');
+	static char     home[128];
 
 	if (arg)
-		return arg->val;
-	else {
-		static char     home[128];
+		return (arg->val);
 
-		if (cnf->home == NULL || *cnf->home == '\0')
-			errx(EX_CONFIG, "no base home directory set");
-		sprintf(home, "%s/%s", cnf->home, user);
-		return home;
-	}
+	if (cnf->home == NULL || *cnf->home == '\0')
+		errx(EX_CONFIG, "no base home directory set");
+	snprintf(home, sizeof(home), "%s/%s", cnf->home, user);
+
+	return (home);
 }
 
 static char    *
@@ -1053,12 +1048,12 @@ shell_path(char const * path, char *shells[], char *sh)
 			static char     shellpath[256];
 
 			if (sh != NULL) {
-				sprintf(shellpath, "%s/%s", p, sh);
+				snprintf(shellpath, sizeof(shellpath), "%s/%s", p, sh);
 				if (access(shellpath, X_OK) == 0)
 					return shellpath;
 			} else
 				for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) {
-					sprintf(shellpath, "%s/%s", p, shells[i]);
+					snprintf(shellpath, sizeof(shellpath), "%s/%s", p, shells[i]);
 					if (access(shellpath, X_OK) == 0)
 						return shellpath;
 				}
@@ -1308,7 +1303,7 @@ rmat(uid_t uid)
 			    st.st_uid == uid) {
 				char            tmp[MAXPATHLEN];
 
-				sprintf(tmp, "/usr/bin/atrm %s", e->d_name);
+				snprintf(tmp, sizeof(tmp), "/usr/bin/atrm %s", e->d_name);
 				system(tmp);
 			}
 		}
diff --git a/pw/pwupd.c b/pw/pwupd.c
index c2a9a53..710e901 100644
--- a/pw/pwupd.c
+++ b/pw/pwupd.c
@@ -33,7 +33,6 @@ static const char rcsid[] =
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#include <stdarg.h>
 #include <pwd.h>
 #include <libutil.h>
 #include <errno.h>
@@ -52,12 +51,13 @@ int
 setpwdir(const char * dir)
 {
 	if (dir == NULL)
-		return -1;
+		return (-1);
 	else
 		pwpath = strdup(dir);
 	if (pwpath == NULL)
-		return -1;
-	return 0;
+		return (-1);
+
+	return (0);
 }
 
 char *
@@ -66,23 +66,20 @@ getpwpath(char const * file)
 	static char pathbuf[MAXPATHLEN];
 
 	snprintf(pathbuf, sizeof pathbuf, "%s/%s", pwpath, file);
-	return pathbuf;
+
+	return (pathbuf);
 }
 
 static int
-pwdb(char *arg,...)
+pwdb_check(void)
 {
 	int             i = 0;
 	pid_t           pid;
-	va_list         ap;
 	char           *args[10];
 
 	args[i++] = _PATH_PWD_MKDB;
-	va_start(ap, arg);
-	while (i < 6 && arg != NULL) {
-		args[i++] = arg;
-		arg = va_arg(ap, char *);
-	}
+	args[i++] = "-C";
+
 	if (pwpath != pathpwd) {
 		args[i++] = "-d";
 		args[i++] = pwpath;
@@ -100,65 +97,66 @@ pwdb(char *arg,...)
 		if (WEXITSTATUS(i))
 			i = EIO;
 	}
-	va_end(ap);
-	return i;
+
+	return (i);
 }
 
 static int
 pw_update(struct passwd * pwd, char const * user)
 {
-	int             rc = 0;
-
-	rc = pwdb("-C", (char *)NULL);	/* Check only */
-	if (rc == 0) {
-		int pfd, tfd;
-		struct passwd *pw = NULL;
-		struct passwd *old_pw = NULL;
-
-		if (pwd != NULL)
-			pw = pw_dup(pwd);
-
-		if (user != NULL)
-			old_pw = GETPWNAM(user);
-
-		if (pw_init(pwpath, NULL))
-			err(1, "pw_init()");
-		if ((pfd = pw_lock()) == -1) {
-			pw_fini();
-			err(1, "pw_lock()");
-		}
-		if ((tfd = pw_tmp(-1)) == -1) {
-			pw_fini();
-			err(1, "pw_tmp()");
-		}
-		if (pw_copy(pfd, tfd, pw, old_pw) == -1) {
-			pw_fini();
-			err(1, "pw_copy()");
-		}
-		/*
-		 * in case of deletion of a user, the whole database
-		 * needs to be regenerated
-		 */
-		if (pw_mkdb(pw != NULL ? pw->pw_name : NULL) == -1) {
-			pw_fini();
-			err(1, "pw_mkdb()");
-		}
-		free(pw);
+	struct passwd	*pw = NULL;
+	struct passwd	*old_pw = NULL;
+	int		 rc, pfd, tfd;
+
+	if ((rc = pwdb_check()) != 0)
+		return (rc);
+
+	if (pwd != NULL)
+		pw = pw_dup(pwd);
+
+	if (user != NULL)
+		old_pw = GETPWNAM(user);
+
+	if (pw_init(pwpath, NULL))
+		err(1, "pw_init()");
+	if ((pfd = pw_lock()) == -1) {
 		pw_fini();
+		err(1, "pw_lock()");
 	}
-	return 0;
+	if ((tfd = pw_tmp(-1)) == -1) {
+		pw_fini();
+		err(1, "pw_tmp()");
+	}
+	if (pw_copy(pfd, tfd, pw, old_pw) == -1) {
+		pw_fini();
+		err(1, "pw_copy()");
+	}
+	/*
+	 * in case of deletion of a user, the whole database
+	 * needs to be regenerated
+	 */
+	if (pw_mkdb(pw != NULL ? pw->pw_name : NULL) == -1) {
+		pw_fini();
+		err(1, "pw_mkdb()");
+	}
+	free(pw);
+	pw_fini();
+
+	return (0);
 }
 
 int
 addpwent(struct passwd * pwd)
 {
-	return pw_update(pwd, NULL);
+
+	return (pw_update(pwd, NULL));
 }
 
 int
 chgpwent(char const * login, struct passwd * pwd)
 {
-	return pw_update(pwd, login);
+
+	return (pw_update(pwd, login));
 }
 
 int
@@ -167,5 +165,6 @@ delpwent(struct passwd * pwd)
 	char login[MAXLOGNAME];
 	
 	strlcpy(login, pwd->pw_name, MAXLOGNAME);
-	return pw_update(NULL, login);
+
+	return (pw_update(NULL, login));
 }
diff --git a/pw/pwupd.h b/pw/pwupd.h
index 200ffee..d6e39ce 100644
--- a/pw/pwupd.h
+++ b/pw/pwupd.h
@@ -112,10 +112,7 @@ void           vendgrent(void);
 
 void copymkdir(char const * dir, char const * skel, mode_t mode, uid_t uid, gid_t gid);
 void rm_r(char const * dir, uid_t uid);
-int extendline(char **buf, int *buflen, int needed);
 int extendarray(char ***buf, int *buflen, int needed);
 __END_DECLS
 
-#define PWBUFSZ 1024
-
 #endif				/* !_PWUPD_H */