fgetpwent(3) - Linux manual page (original) (raw)

fgetpwent(3) Library Functions Manual fgetpwent(3)

NAME top

   fgetpwent - get password file entry

LIBRARY top

   Standard C library (_libc_, _-lc_)

SYNOPSIS top

   **#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

DESCRIPTION top

   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)](../man5/passwd.5.html)).

   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 */
       };

RETURN VALUE top

   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](../man3/errno.3.html)_ is set to indicate the error.

ERRORS top

   **ENOMEM** Insufficient memory to allocate _passwd_ structure.

FILES top

   _/etc/passwd_
          password database file

ATTRIBUTES top

   For an explanation of the terms used in this section, see
   [attributes(7)](../man7/attributes.7.html).
   ┌─────────────────────┬───────────────┬──────────────────────────┐
   │ **Interface** │ **Attribute** │ **Value** │
   ├─────────────────────┼───────────────┼──────────────────────────┤
   │ **fgetpwent**()         │ Thread safety │ MT-Unsafe race:fgetpwent │
   └─────────────────────┴───────────────┴──────────────────────────┘

STANDARDS top

   None.

HISTORY top

   SVr4.

SEE ALSO top

   [endpwent(3)](../man3/endpwent.3.html), [fgetpwent_r(3)](../man3/fgetpwent%5Fr.3.html), [fopen(3)](../man3/fopen.3.html), [getpw(3)](../man3/getpw.3.html), [getpwent(3)](../man3/getpwent.3.html),
   [getpwnam(3)](../man3/getpwnam.3.html), [getpwuid(3)](../man3/getpwuid.3.html), [putpwent(3)](../man3/putpwent.3.html), [setpwent(3)](../man3/setpwent.3.html), [passwd(5)](../man5/passwd.5.html)

COLOPHON top

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   man-pages@man7.org

Linux man-pages 6.10 2024-07-23 fgetpwent(3)

Pages that refer to this page:getpw(3), getpwent(3), getpwent_r(3), getpwnam(3), putpwent(3)