doc/doxygen/grp_8h_source.html

 #pragma once


 #include "stddef.h"


 #define MAX_MEMBERS_PER_GROUP 64


 typedef struct group {

     char *gr_name;

     char *gr_passwd;

     gid_t gr_gid;

     char *gr_mem[MAX_MEMBERS_PER_GROUP + 1];

 } group_t;


 group_t *getgrgid(gid_t gid);


 group_t *getgrnam(const char *name);


 int getgrgid_r(gid_t gid, group_t *group, char *buf, size_t buflen, group_t **result);


 int getgrnam_r(const char *name, group_t *group, char *buf, size_t buflen, group_t **result);


 group_t *getgrent(void);


 void endgrent(void);


 void setgrent(void);

MAX_MEMBERS_PER_GROUP
#define MAX_MEMBERS_PER_GROUP
Maximum number of users per group.
Definition: grp.h:11

getgrnam_r
int getgrnam_r(const char *name, group_t *group, char *buf, size_t buflen, group_t **result)
Provides the same information as getgrnam but it stores the results inside group, and the string info...
Definition: grp.c:167

getgrgid
group_t * getgrgid(gid_t gid)
Provides access to the group database entry for uid.
Definition: grp.c:113

group_t
struct group group_t
Contains user group informations.

getgrent
group_t * getgrent(void)
Returns a pointer to a structure containing the broken-out fields of an entry in the group database.
Definition: grp.c:191

setgrent
void setgrent(void)
May be called to close the group database when processing is complete.
Definition: grp.c:253

getgrgid_r
int getgrgid_r(gid_t gid, group_t *group, char *buf, size_t buflen, group_t **result)
Provides the same information as getgrgid but it stores the results inside group, and the string info...
Definition: grp.c:143

endgrent
void endgrent(void)
Rewinds the group database to allow repeated searches.
Definition: grp.c:246

getgrnam
group_t * getgrnam(const char *name)
Provides access to the group database entry for name.
Definition: grp.c:126

stddef.h
Define basic data types.

gid_t
int gid_t
The type of group-id.
Definition: stddef.h:43

group
Contains user group informations.
Definition: grp.h:14

group::gr_gid
gid_t gr_gid
Group ID.
Definition: grp.h:20

group::gr_mem
char * gr_mem[MAX_MEMBERS_PER_GROUP+1]
List of group members.
Definition: grp.h:22

group::gr_passwd
char * gr_passwd
Encrypted password.
Definition: grp.h:18

group::gr_name
char * gr_name
The name of the group.
Definition: grp.h:16