From 3a9241add947cb6d24b5de7a8927517426a78795 Mon Sep 17 00:00:00 2001 From: Rob Landley Date: Sat, 25 Aug 2012 14:25:22 -0500 Subject: Move commands into "posix", "lsb", and "other" menus/directories. --- toys/posix/nice.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 toys/posix/nice.c (limited to 'toys/posix/nice.c') diff --git a/toys/posix/nice.c b/toys/posix/nice.c new file mode 100644 index 00000000..84975dfc --- /dev/null +++ b/toys/posix/nice.c @@ -0,0 +1,41 @@ +/* vi: set sw=4 ts=4: + * + * nice.c - Run a program at a different niceness level. + * + * Copyright 2010 Rob Landley + * + * See http://www.opengroup.org/onlinepubs/9699919799/utilities/nice.html + +USE_NICE(NEWTOY(nice, "^<1n#", TOYFLAG_USR|TOYFLAG_BIN)) + +config NICE + bool "nice" + default y + help + usage: nice [-n PRIORITY] command [args...] + + Run a command line at an increased or decreased scheduling priority. + + Higher numbers make a program yield more CPU time, from -20 (highest + priority) to 19 (lowest). By default processes inherit their parent's + niceness (usually 0). By default this command adds 10 to the parent's + priority. Only root can set a negative niceness level. +*/ + +#include "toys.h" + +DEFINE_GLOBALS( + long priority; +) + +#define TT this.nice + +void nice_main(void) +{ + if (!toys.optflags) TT.priority = 10; + + errno = 0; + if (nice(TT.priority)==-1 && errno) perror_exit("Can't set priority"); + + xexec(toys.optargs); +} -- cgit v1.2.3