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(2)










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