GETGRENT
Section: Linux Programmer's Manual (3)
Updated: April 4, 1993
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NAME
getgrent, setgrent, endgrent - get group file entry
SYNOPSIS
#include <grp.h>
#include <sys/types.h>
struct group *getgrent(void);
void setgrent(void);
void endgrent(void);
DESCRIPTION
The getgrent() function returns a pointer to a structure containing
the group information from /etc/group. The first time it is called
it returns the first entry; thereafter, it returns successive entries.
The setgrent() function rewinds the file pointer to the beginning
of the /etc/group file.
The endgrent() function closes the /etc/group file.
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; /* group members */
};
RETURN VALUE
The getgrent() function returns the group information structure,
or NULL if there are no more entries or an error occurs.
ERRORS
- ENOMEM
-
Insufficient memory to allocate group information structure.
FILES
/etc/groupgroup database file
CONFORMING TO
SVID 3, BSD 4.3
SEE ALSO
fgetgrent(3), getgrnam(3), getgrgid(3)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- FILES
-
- CONFORMING TO
-
- SEE ALSO
-
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