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authorJohn Gilmore <gnu@cygnus>1991-04-25 04:20:18 +0000
committerJohn Gilmore <gnu@cygnus>1991-04-25 04:20:18 +0000
commitbad3df6720febc5e2e5e4a2af6acbb3bdd66b048 (patch)
tree6977c6cc981dc67680341986bb156558caa44c15 /include/wait.h
parenta07cc61341225966fd714e8715aeca6c558b5b8e (diff)
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Merge intel-deliver and amd-deliver "include" directories, and the
GDB include directory, all into a single include directory. There are minor corresponding changes in a few files in bfd and gdb.
Diffstat (limited to 'include/wait.h')
-rw-r--r--include/wait.h50
1 files changed, 25 insertions, 25 deletions
diff --git a/include/wait.h b/include/wait.h
index 339c2eb..8bf0676 100644
--- a/include/wait.h
+++ b/include/wait.h
@@ -1,27 +1,27 @@
+/* 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. */
-/* Define how to access the structure that the wait system call stores.
- On many systems, there is a structure defined for this.
- But on vanilla-ish USG systems there is not. */
+/* 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 HAVE_WAIT_STRUCT
-#define WAITTYPE int
-#define WIFSTOPPED(w) (((w)&0377) == 0177)
-#define WIFSIGNALED(w) (((w)&0377) != 0177 && ((w)&~0377) == 0)
-#define WIFEXITED(w) (((w)&0377) == 0)
-#define WRETCODE(w) ((w) >> 8)
-#define WSTOPSIG(w) ((w) >> 8)
-#define WCOREDUMP(w) (((w)&0200) != 0)
-#define WTERMSIG(w) ((w) & 0177)
-#define WSETEXIT(w, status) ((w) = (status))
-#define WSETSTOP(w,sig) ((w) = (0177 | ((sig) << 8)))
-#else
-#include <sys/wait.h>
-#define WAITTYPE union wait
-#define WRETCODE(w) (w).w_retcode
-#define WSTOPSIG(w) (w).w_stopsig
-#define WCOREDUMP(w) (w).w_coredump
-#define WTERMSIG(w) (w).w_termsig
-#define WSETEXIT(w, status) ((w).w_status = (status))
-#define WSETSTOP(w,sig) \
- ((w).w_stopsig = (sig), (w).w_coredump = 0, (w).w_termsig = 0177)
-#endif
+#define WIFEXITED(w) (((w)&0377) == 0)
+#define WIFSIGNALED(w) (((w)&0377) != 0177 && ((w)&~0377) == 0)
+#define WIFSTOPPED(w) (((w)&0377) == 0177)
+
+#define WEXITSTATUS(w) ((w) >> 8) /* same as WRETCODE */
+#define WTERMSIG(w) ((w) & 0177)
+#define WSTOPSIG(w) ((w) >> 8)
+
+/* These are not defined in POSIX, but are used by our programs. */
+
+#define WAITTYPE int
+
+#define WCOREDUMP(w) (((w)&0200) != 0)
+#define WSETEXIT(w,status) ((w) = (0 | ((status) << 8)))
+#define WSETSTOP(w,sig) ((w) = (0177 | ((sig) << 8)))