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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | FILES | CONFORMING TO | SEE ALSO | COLOPHON |
FGETPWENT(3) Linux Programmer's Manual FGETPWENT(3)
fgetpwent - get password file entry
#include <stdio.h>
#include <sys/types.h>
#include <pwd.h>
struct passwd *fgetpwent(FILE *stream);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
fgetpwent():
Since glibc 2.19:
_DEFAULT_SOURCE
Glibc 2.19 and earlier:
_SVID_SOURCE
The fgetpwent() function returns a pointer to a structure containing
the broken out fields of a line in the file stream. The first time
it is called it returns the first entry; thereafter, it returns
successive entries. The file referred to by stream must have the
same format as /etc/passwd (see passwd(5)).
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 fgetpwent() function returns a pointer to a passwd structure, or
NULL if there are no more entries or an error occurs. In the event
of an error, errno is set to indicate the cause.
ENOMEM Insufficient memory to allocate passwd structure.
/etc/passwd
password database file
┌────────────┬───────────────┬──────────────────────────┐
│Interface │ Attribute │ Value │
├────────────┼───────────────┼──────────────────────────┤
│fgetpwent() │ Thread safety │ MT-Unsafe race:fgetpwent │
└────────────┴───────────────┴──────────────────────────┘
SVr4.
endpwent(3), fgetpwent_r(3), fopen(3), getpw(3), getpwent(3),
getpwnam(3), getpwuid(3), putpwent(3), setpwent(3), passwd(5)
This page is part of release 4.12 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
https://www.kernel.org/doc/man-pages/.
GNU 2016-03-15 FGETPWENT(3)
Pages that refer to this page: getpw(3), getpwent(3), getpwent_r(3), getpwnam(3), putpwent(3)