wstat(5)                                                           wstat(5)


   NAME
         wstat - wait status

   SYNOPSIS
         #include <sys/wait.h>

   DESCRIPTION
         When a process waits for status from its children via either the wait
         or waitpid function, the status returned may be evaluated with the
         following macros, defined in sys/wait.h. These macros evaluate to
         integral expressions.  The stat argument to these macros is the
         integer value returned from wait or waitpid.

           WIFEXITED(stat)     Evaluates to a non-zero value if status was
                               returned for a child process that terminated
                               normally.

           WEXITSTATUS(stat)   If the value of WIFEXITED(stat) is non-zero,
                               this macro evaluates to the exit code that the
                               child process passed to exit or exit, or the
                               value that the child process returned from
                               main.

           WIFSIGNALED(stat)   Evaluates to a non-zero value if status was
                               returned for a child process that terminated
                               due to the receipt of a signal.

           WTERMSIG(stat)      If the value of WIFSIGNALED(stat) is non-zero,
                               this macro evaluates to the number of the
                               signal that caused the termination of the child
                               process.

           WIFSTOPPED(stat)    Evaluates to a non-zero value if status was
                               returned for a child process that is currently
                               stopped.

           WSTOPSIG(stat)      If the value of WIFSTOPPED(stat) is non-zero,
                               this macro evaluates to the number of the
                               signal that caused the child process to stop.

           WIFCONTINUED(stat)  Evaluates to a non-zero value if status was
                               returned for a child process that has
                               continued.

           WCOREDUMP(stat)     If the value of WIFSIGNALED (stat) is non-zero,
                               this macro evaluates to a non-zero value if a
                               core image of the terminated child was created.

   SEE ALSO
         exit(2), wait(2), waitpid(3C).



   7/91                                                                 Page 1