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FreeBSD 11.0 - man page for pw_fini (freebsd section 3)

PW_UTIL(3)						   BSD Library Functions Manual 						PW_UTIL(3)

NAME
pw_copy, pw_dup, pw_edit, pw_equal, pw_fini, pw_init, pw_make, pw_make_v7, pw_mkdb, pw_lock, pw_scan, pw_tempname, pw_tmp -- functions for passwd file handling
LIBRARY
System Utilities Library (libutil, -lutil)
SYNOPSIS
#include <pwd.h> #include <libutil.h> int pw_copy(int ffd, int tfd, const struct passwd *pw, struct passwd *oldpw); struct passwd * pw_dup(const struct passwd *pw); int pw_edit(int nosetuid); int pw_equal(const struct passwd *pw1, const struct passwd *pw2); void pw_fini(void); int pw_init(const char *dir, const, char, *master"); char * pw_make(const struct passwd *pw); char * pw_make_v7(const struct passwd *pw); int pw_mkdb(const char *user); int pw_lock(void); struct passwd * pw_scan(const char *line, int flags); const char * pw_tempname(void); int pw_tmp(int mfd);
DESCRIPTION
The pw_copy() function reads a password file from ffd and writes it back out to tfd possibly with modifications: - If pw is NULL and oldpw is not NULL, then the record represented by oldpw will not be copied (corresponding to user deletion). - If pw and oldpw are not NULL then the record corresponding to pw will be replaced by the record corresponding to oldpw. - If pw is set and oldpw is NULL then the record corresponding to pw will be appended (corresponding to user addition). The pw_copy() function returns -1 in case of failure otherwise 0. The pw_dup() function duplicates the struct passwd pointed to by pw and returns a pointer to the copy, or NULL in case of failure. The new struct passwd is allocated with malloc(3), and it is the caller's responsibility to free it with free(3). The pw_edit() function invokes the command specified by the EDITOR environment variable (or /usr/bin/vi if EDITOR is not defined) on a tempo- rary copy of the master password file created by pw_tmp(). If the file was modified, pw_edit() installs it and regenerates the password database. The pw_edit() function returns -1 in case of failure, 0 if the file was not modified, and a non-zero positive number if the file was modified and successfully installed. The pw_equal() function compares two struct passwd and returns 0 if they are equal. The pw_fini() function destroy the temporary file created by pw_tmp() if any, kills any running instance of EDITOR executed by pw_edit() if any, and closes the lock created by pw_lock() if any. The pw_init() initialize the static variable representing the path a password file. dir is the directory where the password file is located. If set to NULL, it will default to /etc. master is the name of the password file. If set to NULL? it will default to master.passwd The pw_make() function creates a properly formatted BSD passwd(5) line from a struct passwd, and returns a pointer to the resulting string. The string is allocated with malloc(3), and it is the caller's responsibility to free it with free(3). The pw_make_v7() function creates a properly formatted UNIX V7 passwd(5) line from a struct passwd, and returns a pointer to the resulting string. The string is allocated with malloc(3), and it is the caller's responsibility to free it with free(3). The pw_mkdb() function regenerates the password database by running pw_mkdb(8). If user only the record corresponding to that user will be updated. The pw_mkdb() function returns 0 in case of success and -1 in case of failure. The pw_lock() function locks the master password file. It returns 0 in case of success and -1 in case of failure. The pw_scan() function is a wrapper around the internal libc function __pw_scan(). It scans the master password file for a line correspond- ing to the line provided and return a struct passwd if it matched an existing record. In case of failure, it returns NULL. Otherwise, it returns a pointer to a struct passwd containing the matching record. The struct passwd is allocated with malloc(3), and it is the caller's responsibility to free it with free(3). The pw_tempname() function returns the temporary name of the masterfile created via pw_tmp(). The pw_tmp() creates and opens a presumably safe temporary password file. If mfd is a file descriptor to an open password file, it will be read and written back to the temporary password file. Otherwise if should be set -1. The pw_tmp() returns an open file descriptor to the temporary password file or -1 in case of failure.
AUTHORS
Portions of this software were developed for the FreeBSD Project by ThinkSec AS and Network Associates Laboratories, the Security Research Division of Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 (``CBOSS''), as part of the DARPA CHATS research program. This manual page was written by Baptiste Daroussin <bapt@FreeBSD.org>.
BSD
October 30, 2012 BSD

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