| /* 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 |
| |