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fgetgrent(3)


NAME

   fgetgrent - get group file entry

SYNOPSIS

   #include <stdio.h>
   #include <sys/types.h>
   #include <grp.h>

   struct group *fgetgrent(FILE *stream);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

   fgetgrent():
       Since glibc 2.19:
           _DEFAULT_SOURCE
       Glibc 2.19 and earlier:
           _SVID_SOURCE

DESCRIPTION

   The  fgetgrent()  function  returns a pointer to a structure containing
   the group information from the file referred to by 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/group (see group(5)).

   The group structure is defined in <grp.h> as follows:

       struct group {
           char   *gr_name;        /* group name */
           char   *gr_passwd;      /* group password */
           gid_t   gr_gid;         /* group ID */
           char  **gr_mem;         /* NULL-terminated array of pointers
                                      to names of group members */
       };

RETURN VALUE

   The  fgetgrent()  function  returns  a pointer to a group 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.

ERRORS

   ENOMEM Insufficient memory to allocate group structure.

ATTRIBUTES

   For   an   explanation   of   the  terms  used  in  this  section,  see
   attributes(7).

   
   Interface    Attribute      Value                    
   
   fgetgrent()  Thread safety  MT-Unsafe race:fgetgrent

CONFORMING TO

   SVr4.

SEE ALSO

   endgrent(3),  fgetgrent_r(3),   fopen(3),   getgrent(3),   getgrgid(3),
   getgrnam(3), putgrent(3), setgrent(3), group(5)

COLOPHON

   This  page  is  part of release 4.09 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/.



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