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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 pro-
           cess passed to  _exit() (see exit(2)) or exit(3C),  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(2), exit(3C)

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