fgetpwent(3) — Linux manual page

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | FILES | ATTRIBUTES | STANDARDS | HISTORY | SEE ALSO | COLOPHON

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)).

       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 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).
       ┌────────────────────┬───────────────┬──────────────────────────┐
       │ Interface          Attribute     Value                    │
       ├────────────────────┼───────────────┼──────────────────────────┤
       │ fgetpwent()        │ Thread safety │ MT-Unsafe race:fgetpwent │
       └────────────────────┴───────────────┴──────────────────────────┘

STANDARDS         top

       None.

HISTORY         top

       SVr4.

SEE ALSO         top

       endpwent(3), fgetpwent_r(3), fopen(3), getpw(3), getpwent(3),
       getpwnam(3), getpwuid(3), putpwent(3), setpwent(3), passwd(5)

COLOPHON         top

       This page is part of the man-pages (Linux kernel and C library
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Linux man-pages 6.9.1          2024-05-02                   fgetpwent(3)

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