wstat(5)                                                           wstat(5)

NAME
     wstat - wait status

SYNOPSIS
     #include <sys/wait.h>

DESCRIPTION
     When a process waits for status from its children through 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 nor-
                         mally.

     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(2).








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