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- /* Define how to access the int that the wait system call stores.
- This has been compatible in all Unix systems since time immemorial,
- but various well-meaning people have defined various different
- words for the same old bits in the same old int (sometimes claimed
- to be a struct). We just know it's an int and we use these macros
- to access the bits. */
-
- /* The following macros are defined equivalently to their definitions
- in POSIX.1. We fail to define WNOHANG and WUNTRACED, which POSIX.1
- <sys/wait.h> defines, since our code does not use waitpid(). We
- also fail to declare wait() and waitpid(). */
-
- #ifndef WIFEXITED
- #define WIFEXITED(w) (((w)&0377) == 0)
- #endif
-
- #ifndef WIFSIGNALED
- #define WIFSIGNALED(w) (((w)&0377) != 0177 && ((w)&~0377) == 0)
- #endif
-
- #ifndef WIFSTOPPED
- #ifdef IBM6000
-
- /* Unfortunately, the above comment (about being compatible in all Unix
- systems) is not quite correct for AIX, sigh. And AIX 3.2 can generate
- status words like 0x57c (sigtrap received after load), and gdb would
- choke on it. */
-
- #define WIFSTOPPED(w) ((w)&0x40)
-
- #else
- #define WIFSTOPPED(w) (((w)&0377) == 0177)
- #endif
- #endif
-
- #ifndef WEXITSTATUS
- #define WEXITSTATUS(w) (((w) >> 8) & 0377) /* same as WRETCODE */
- #endif
-
- #ifndef WTERMSIG
- #define WTERMSIG(w) ((w) & 0177)
- #endif
-
- #ifndef WSTOPSIG
- #define WSTOPSIG WEXITSTATUS
- #endif
-
- /* These are not defined in POSIX, but are used by our programs. */
-
- #define WAITTYPE int
-
- #ifndef WCOREDUMP
- #define WCOREDUMP(w) (((w)&0200) != 0)
- #endif
-
- #ifndef WSETEXIT
- #define WSETEXIT(w,status) ((w) = (0 | ((status) << 8)))
- #endif
-
- #ifndef WSETSTOP
- #define WSETSTOP(w,sig) ((w) = (0177 | ((sig) << 8)))
- #endif
-
-