pw(8) -- a backend utility to manage the user and group databases.

sysinstall's new User&group menu will use it, hence it's a 2.2
candidate despite of providing new functionality.

Submitted by:	David L. Nugent, <davidn@blaze.net.au>

1 files changed, 160 insertions, 0 deletions

diff --git a/pw/pwupd.c b/pw/pwupd.c
new file mode 100644
index 0000000..e13ce5f
--- /dev/null
+++ b/pw/pwupd.c
@@ -0,0 +1,160 @@
+/*-
+ * Copyright (c) 1996 by David L. Nugent <davidn@blaze.net.au>.
+ * 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 as
+ *    the first lines of this file unmodified.
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by David L. Nugent.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DAVID L. NUGENT ``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 DAVID L. NUGENT 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.
+ *
+ *	$Id$
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <stdarg.h>
+
+#include "pwupd.h"
+
+static int
+pwdb(char *arg,...)
+{
+	int             i = 0;
+	pid_t           pid;
+	va_list         ap;
+	char           *args[8];
+
+	args[i++] = _PATH_PWD_MKDB;
+	va_start(ap, arg);
+	while (i < 6 && arg != NULL) {
+		args[i++] = arg;
+		arg = va_arg(ap, char *);
+	}
+	args[i++] = _PATH_MASTERPASSWD;
+	args[i] = NULL;
+
+	if ((pid = fork()) == -1)	/* Error (errno set) */
+		i = -1;
+	else if (pid == 0) {	/* Child */
+		execv(args[0], args);
+		_exit(1);
+	} else {		/* Parent */
+		waitpid(pid, &i, 0);
+		if ((i = WEXITSTATUS(i)) != 0)
+			errno = EIO;	/* set SOMETHING */
+	}
+	return i;
+}
+
+int
+fmtpwentry(char *buf, struct passwd * pwd, int type)
+{
+	int             l;
+	char           *pw;
+
+	pw = (pwd->pw_passwd == NULL || !*pwd->pw_passwd) ? "" : (type == PWF_MASTER) ? pwd->pw_passwd : "*";
+
+	if (type == PWF_PASSWD)
+		l = sprintf(buf, "%s:*:%ld:%ld:%s:%s:%s\n",
+		       pwd->pw_name, (long) pwd->pw_uid, (long) pwd->pw_gid,
+			    pwd->pw_gecos ? pwd->pw_gecos : "User &",
+			    pwd->pw_dir, pwd->pw_shell);
+	else
+		l = sprintf(buf, "%s:%s:%ld:%ld:%s:%lu:%lu:%s:%s:%s\n",
+		   pwd->pw_name, pw, (long) pwd->pw_uid, (long) pwd->pw_gid,
+			    pwd->pw_class ? pwd->pw_class : "",
+			    (unsigned long) pwd->pw_change,
+			    (unsigned long) pwd->pw_expire,
+			    pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
+	return l;
+}
+
+
+int
+fmtpwent(char *buf, struct passwd * pwd)
+{
+	return fmtpwentry(buf, pwd, PWF_STANDARD);
+}
+
+static int
+pw_update(struct passwd * pwd, char const * user, int mode)
+{
+	int             rc = 0;
+
+	endpwent();
+
+	/*
+	 * First, let's check the see if the database is alright
+	 */
+	if (pwdb("-c", NULL) == 0) {	/* Check only */
+		char            pfx[32];
+		char            pwbuf[MAXPWLINE];
+		int             l = sprintf(pfx, "%s:", user);
+
+		/*
+		 * Update the passwd file first
+		 */
+		if (pwd == NULL)
+			*pwbuf = '\0';
+		else
+			fmtpwentry(pwbuf, pwd, PWF_PASSWD);
+		if ((rc = fileupdate(_PATH_PASSWD, 0644, pwbuf, pfx, l, mode)) != 0) {
+
+			/*
+			 * Then the master.passwd file
+			 */
+			if (pwd != NULL)
+				fmtpwentry(pwbuf, pwd, PWF_MASTER);
+			if ((rc = fileupdate(_PATH_MASTERPASSWD, 0644, pwbuf, pfx, l, mode)) != 0)
+				rc = pwdb(NULL) == 0;
+		}
+	}
+	return rc;
+}
+
+int
+addpwent(struct passwd * pwd)
+{
+	return pw_update(pwd, pwd->pw_name, UPD_CREATE);
+}
+
+int
+chgpwent(char const * login, struct passwd * pwd)
+{
+	return pw_update(pwd, login, UPD_REPLACE);
+}
+
+int
+delpwent(struct passwd * pwd)
+{
+	return pw_update(NULL, pwd->pw_name, UPD_DELETE);
+}