fgetgrent - get group file entry

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

       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 */
           };

ENOMEM Insufficient memory to allocate group structure.

       SVr4.

       Standard C library (libc, -lc)

       fgetgrent - get group file entry

       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 error.

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

Linux man-pages 6.9.1                              2024-05-02                                       fgetgrent(3)

       None.

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