wstat(5)                         UNIX System V                         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)







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