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authorRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
committerRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
commit252b5132c753830d5fd56823373aed85f2a0db63 (patch)
tree1af963bfd8d3e55167b81def4207f175eaff3a56 /include/wait.h
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19990502 sourceware importbinu_ss_19990502
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diff --git a/include/wait.h b/include/wait.h
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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
+