--- nice.c.orig 2009-11-07 14:51:38.000000000 -0800 +++ nice.c 2009-11-07 14:51:40.000000000 -0800 @@ -38,7 +38,9 @@ __FBSDID("$FreeBSD: src/lib/libc/gen/nic #include <sys/resource.h> #include <errno.h> #include <unistd.h> - +#if __DARWIN_UNIX03 +#include <limits.h> +#endif /* __DARWIN_UNIX03 */ /* * Backwards compatible nice. */ @@ -46,11 +48,18 @@ int nice(incr) int incr; { - int prio; + int prio, rv; errno = 0; prio = getpriority(PRIO_PROCESS, 0); if (prio == -1 && errno) return (-1); - return (setpriority(PRIO_PROCESS, 0, prio + incr)); +#if __DARWIN_UNIX03 + if (prio + incr > NZERO-1) + incr = NZERO-1-prio; +#endif /* __DARWIN_UNIX03 */ + rv = setpriority(PRIO_PROCESS, 0, prio + incr); + if (rv == -1 && errno == EACCES) + errno = EPERM; + return (rv == -1) ? rv : getpriority(PRIO_PROCESS, 0); }