pw_mkdb(3)
- NetBSD Manual Pages
PW_LOCK(3) NetBSD Programmer's Manual PW_LOCK(3)
NAME
pw_lock, pw_mkdb, pw_abort - passwd file update functions
LIBRARY
System Utilities Library (libutil, -lutil)
SYNOPSIS
#include <util.h>
int
pw_lock(int retries);
int
pw_mkdb();
void
pw_abort();
DESCRIPTION
The pw_lock(), pw_mkdb(), and pw_abort() functions allow a program to up-
date the system passwd database.
The pw_lock() function attempts to lock the passwd database by creating
the file /etc/ptmp, and returns the file descriptor of that file. If
retries is greater than zero, pw_lock() will try multiple times to open
/etc/ptmp, waiting one second between tries. In addition to being a lock
file, /etc/ptmp will also hold the contents of the new passwd file.
The pw_mkdb() function updates the passwd file from the contents of
/etc/ptmp. You should finish writing to and close the file descriptor
returned by pw_lock() before calling pw_mkdb(). If pw_mkdb() fails and
you do not wish to retry, you should make sure to call pw_abort() to
clean up the lock file.
The pw_abort() function aborts a passwd file update by deleting
/etc/ptmp. The passwd database remains unchanged.
RETURN VALUES
The pw_lock() and pw_mkdb() functions return -1 if they are unable to
complete properly.
FILES
/etc/master.passwd
/etc/ptmp
SEE ALSO
pw_init(3)
NetBSD 1.5.1 December 15, 1995 1
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