granicus.if.org Git - strace/blob - tests/vhangup.c

   1 #include "tests.h"
   2 #include <asm/unistd.h>
   3
   4 #ifdef __NR_vhangup
   5
   6 # include <stdio.h>
   7 # include <unistd.h>
   8
   9 int
  10 main(void)
  11 {
  12         if (setsid() == -1)
  13                 perror_msg_and_skip("setsid");
  14
  15         long rc = syscall(__NR_vhangup);
  16
  17         /*
  18          * On setsid() success, the new session has no controlling terminal,
  19          * therefore a subsequent vhangup() has nothing to hangup.
  20          *
  21          * The system call, however, returns 0 iff the calling process
  22          * has CAP_SYS_TTY_CONFIG capability.
  23          */
  24         printf("vhangup() = %s\n", sprintrc(rc));
  25
  26         puts("+++ exited with 0 +++");
  27         return 0;
  28 }
  29
  30 #else
  31
  32 SKIP_MAIN_UNDEFINED("__NR_vhangup")
  33
  34 #endif