fgetgrent

(3)

get group file entry

#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

LIBRARY

Standard C library (libc, -lc)

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 error.

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

STANDARDS

None.

HISTORY

SVr4.