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/* vi: set sw=4 ts=4:
*
* nice.c - Run a program at a different niceness level.
*
* Copyright 2010 Rob Landley <rob@landley.net>
*
* 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);
}
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