NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | FILES | CONFORMING TO | BUGS | SEE ALSO | COLOPHON
GETPW(3) Linux Programmer's Manual GETPW(3)
getpw - Re-construct password line entry
#define _GNU_SOURCE
#include <sys/types.h>
#include <pwd.h>
int getpw(uid_t uid, char *buf);
The getpw() function re-constructs 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; /* real name */
char *pw_dir; /* home directory */
char *pw_shell; /* shell program */
};
The getpw() function returns 0 on success; on error, it returns -1, and errno
is set to indicate the error.
EINVAL buf is NULL.
ENOENT No user corresponding to uid.
ENOMEM Insufficient memory to allocate passwd structure.
/etc/passwd
password database file
SVr2.
The getpw() function is dangerous as it may overflow the provided buffer buf.
It is obsoleted by getpwuid(3).
endpwent(3), fgetpwent(3), getpwent(3), getpwnam(3), getpwuid(3), putpwent(3),
setpwent(3), passwd(5)
This page is part of release 3.23 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can be found
at http://www.kernel.org/doc/man-pages/.
GNU 2007-12-12 GETPW(3)