geteuid()

Get the effective user ID

Synopsis:

#include <sys/types.h>
#include <unistd.h>

uid_t geteuid( void );

Library:

libc

Description:

The geteuid() function gets the effective user ID for the calling process.

Returns:

The calling process's effective user ID.

Examples:

/*
 * Print the effective user ID of a process.
 */
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>

int main( void )
{
  printf( "My effective user ID is %d\n", geteuid() );
  return EXIT_SUCCESS;
}

Classification:

POSIX 1003.1

Safety:
Cancellation point	No
Interrupt handler	No
Signal handler	Yes
Thread	Yes