- for (i = 0; i < 0x10000; i = (i ? i << 1 : 1))
- if (!!WIFSIGNALED (i) + !!WIFEXITED (i) + !!WIFSTOPPED (i) != 1)
- return 1;
+ for (i = 0; i < 0x8000; i = (i ? i << 1 : 1))
+ {
+ /* POSIX requires that for all valid process statuses, that
+ exactly one of these three macros is true. But not all
+ possible 16-bit values map to valid process status.
+ Traditionally, 8 of the bits are for WIFEXITED, 7 of the bits
+ to tell between WIFSIGNALED and WIFSTOPPED, and either 0x80
+ or 0x8000 to flag that core was also dumped. Since we don't
+ know which byte is WIFEXITED, we skip the both possible bits
+ that can signal core dump. */
+ if (i == 0x80)
+ continue;
+ if (!!WIFSIGNALED (i) + !!WIFEXITED (i) + !!WIFSTOPPED (i) != 1)
+ return 1;
+ }