table of contents
fgetgrent(3) | Library Functions Manual | fgetgrent(3) |
NAME¶
fgetgrent - get group file entry
LIBRARY¶
Standard C library (libc, -lc)
SYNOPSIS¶
#include <stdio.h> #include <sys/types.h> #include <grp.h>
struct group *fgetgrent(FILE *stream);
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 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.
SEE ALSO¶
endgrent(3), fgetgrent_r(3), fopen(3), getgrent(3), getgrgid(3), getgrnam(3), putgrent(3), setgrent(3), group(5)
2023-03-30 | Linux man-pages 6.04 |