Rewind to the start of the group database file
#include <grp.h> int setgrent( void );
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The setgrent() function rewinds to the start of the group name database file. It's provided for programs that make multiple lookups in the group database (using the getgrgid() and getgrnam() calls) to avoid the default opening and closing of the group database for each access.
The setgrent() function uses fopen(). As a result, errno can be set to an error for the fopen() call.
| Safety: | |
|---|---|
| Cancellation point | Yes |
| Interrupt handler | No |
| Signal handler | No |
| Thread | No |