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- /* nice.c - Run a program at a different niceness level.
- *
- * Copyright 2010 Rob Landley <rob@landley.net>
- *
- * See http://opengroup.org/onlinepubs/9699919799/utilities/nice.html
- USE_NICE(NEWTOY(nice, "^<1n#", TOYFLAG_BIN))
- config NICE
- bool "nice"
- default y
- help
- usage: nice [-n PRIORITY] COMMAND...
- 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.
- */
- #define FOR_nice
- #include "toys.h"
- GLOBALS(
- long n;
- )
- void nice_main(void)
- {
- if (!toys.optflags) TT.n = 10;
- errno = 0;
- if (nice(TT.n)==-1 && errno) {
- toys.exitval = 125;
- perror_exit("Can't set priority");
- }
- xexec(toys.optargs);
- }
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