English pages are provided only to compare translations to original pages, better looking pages can be browsed at the Linux man-pages official site.

GETPW

Linux Programmer's Manual (3)
2010-10-21
 

NAME

getpw - reconstruct password line entry  

SYNOPSIS

#define _GNU_SOURCE             /* See feature_test_macros(7) */
#include <sys/types.h>
#include <pwd.h>

int getpw(uid_t uid, char *buf);
 

DESCRIPTION

The getpw() function reconstructs the password line entry for the given user ID uid in the buffer buf. The returned buffer contains a line of format

name:passwd:uid:gid:gecos:dir:shell

The passwd structure is defined in <pwd.h> as follows:

struct passwd {
    char   *pw_name;       /* username */
    char   *pw_passwd;     /* user password */
    uid_t   pw_uid;        /* user ID */
    gid_t   pw_gid;        /* group ID */
    char   *pw_gecos;      /* user information */
    char   *pw_dir;        /* home directory */
    char   *pw_shell;      /* shell program */
};

For more information about the fields of this structure, see passwd(5).  

RETURN VALUE

The getpw() function returns 0 on success; on error, it returns -1, and errno is set to indicate the error.  

ERRORS

EINVAL
buf is NULL.
ENOENT
No user corresponding to uid.
ENOMEM
Insufficient memory to allocate passwd structure.
 

FILES

/etc/passwd
password database file
 

CONFORMING TO

SVr2.  

BUGS

The getpw() function is dangerous as it may overflow the provided buffer buf. It is obsoleted by getpwuid(3).  

SEE ALSO

endpwent(3), fgetpwent(3), getpwent(3), getpwnam(3), getpwuid(3), putpwent(3), setpwent(3), passwd(5)  

COLOPHON

This page is part of release 3.66 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
FILES
CONFORMING TO
BUGS
SEE ALSO
COLOPHON

This document was created by man2html, using the manual pages.
Time: 21:43:00 GMT, July 12, 2014