WSTAT(5-SVR4)       RISC/os Reference Manual        WSTAT(5-SVR4)



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 pro-
                           cess 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 pro-
                           cess 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 pro-
                           cess 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 pro-
                           cess 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.



                        Printed 11/19/92                   Page 1

WSTAT(5-SVR4)       RISC/os Reference Manual        WSTAT(5-SVR4)



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





















































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