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 64