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Get the group ID
#include <sys/types.h>
#include <unistd.h>
gid_t getgid( void );
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
The getgid() function gets the group ID for the calling process.
The calling process's group ID. This function can't fail.
/*
* Print the group id of a process.
*/
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
int main( void )
{
printf( "I belong to group ID %d\n", getgid() );
return EXIT_SUCCESS;
}
POSIX 1003.1
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
Yes |
Thread |
Yes |
getegid(),
geteuid(),
getuid()
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