| 1 | /* Define how to access the int that the wait system call stores. |
| 2 | This has been compatible in all Unix systems since time immemorial, |
| 3 | but various well-meaning people have defined various different |
| 4 | words for the same old bits in the same old int (sometimes claimed |
| 5 | to be a struct). We just know it's an int and we use these macros |
| 6 | to access the bits. */ |
| 7 | |
| 8 | /* The following macros are defined equivalently to their definitions |
| 9 | in POSIX.1. We fail to define WNOHANG and WUNTRACED, which POSIX.1 |
| 10 | <sys/wait.h> defines, since our code does not use waitpid(). We |
| 11 | also fail to declare wait() and waitpid(). */ |
| 12 | |
| 13 | #ifndef WIFEXITED |
| 14 | #define WIFEXITED(w) (((w)&0377) == 0) |
| 15 | #endif |
| 16 | |
| 17 | #ifndef WIFSIGNALED |
| 18 | #define WIFSIGNALED(w) (((w)&0377) != 0177 && ((w)&~0377) == 0) |
| 19 | #endif |
| 20 | |
| 21 | #ifndef WIFSTOPPED |
| 22 | #ifdef IBM6000 |
| 23 | |
| 24 | /* Unfortunately, the above comment (about being compatible in all Unix |
| 25 | systems) is not quite correct for AIX, sigh. And AIX 3.2 can generate |
| 26 | status words like 0x57c (sigtrap received after load), and gdb would |
| 27 | choke on it. */ |
| 28 | |
| 29 | #define WIFSTOPPED(w) ((w)&0x40) |
| 30 | |
| 31 | #else |
| 32 | #define WIFSTOPPED(w) (((w)&0377) == 0177) |
| 33 | #endif |
| 34 | #endif |
| 35 | |
| 36 | #ifndef WEXITSTATUS |
| 37 | #define WEXITSTATUS(w) (((w) >> 8) & 0377) /* same as WRETCODE */ |
| 38 | #endif |
| 39 | |
| 40 | #ifndef WTERMSIG |
| 41 | #define WTERMSIG(w) ((w) & 0177) |
| 42 | #endif |
| 43 | |
| 44 | #ifndef WSTOPSIG |
| 45 | #define WSTOPSIG WEXITSTATUS |
| 46 | #endif |
| 47 | |
| 48 | /* These are not defined in POSIX, but are used by our programs. */ |
| 49 | |
| 50 | #define WAITTYPE int |
| 51 | |
| 52 | #ifndef WCOREDUMP |
| 53 | #define WCOREDUMP(w) (((w)&0200) != 0) |
| 54 | #endif |
| 55 | |
| 56 | #ifndef WSETEXIT |
| 57 | #define WSETEXIT(w,status) ((w) = (0 | ((status) << 8))) |
| 58 | #endif |
| 59 | |
| 60 | #ifndef WSETSTOP |
| 61 | #define WSETSTOP(w,sig) ((w) = (0177 | ((sig) << 8))) |
| 62 | #endif |
| 63 | |