Table of Contentsgetgrent, setgrent, endgrent - get group file entry #include <grp.h> #include <sys/types.h>
struct group *getgrent(void);
void setgrent(void);
void endgrent(void); 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 */
};
The getgrent() function returns the group information structure, or NULL if there are no more entries or an error occurs. - ENOMEM
- Insufficient memory to allocate group information structure.
/etc/group group database file
SVID 3, BSD 4.3 fgetgrent(3), getgrnam(3), getgrgid(3)
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