75c97de593
This commit adds the renice command and its man page, it also introduces some fixes: * Makes nice command more solid, it also makes it respect POSIX return values. * Fixes estrtol, which produced a misleading error on out of range errors. * Fixes chgrp.1 NAME section. Signed-off-by: Christoph Lohmann <20h@r-36.net>
45 lines
770 B
C
45 lines
770 B
C
/* See LICENSE file for copyright and license details. */
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#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "util.h"
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static void eusage(void);
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int
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main(int argc, char **argv)
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{
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long val = 10;
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ARGBEGIN {
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case 'n':
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val = estrtol(EARGF(eusage()), 10);
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break;
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default:
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eusage();
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break;
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} ARGEND;
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if(argc == 0)
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eusage();
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errno = 0;
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nice((int)MAX(INT_MIN, MIN(val, INT_MAX)));
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if(errno != 0)
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perror("can't adjust niceness");
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/* POSIX specifies the nice failure still invokes the command */
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execvp(argv[0], argv);
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/* reached only on failure */
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perror(argv[0]);
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return (errno == ENOENT)? 127 : 126;
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}
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static void
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eusage(void)
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{
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eprintf("usage: nice [-n inc] command [options ...]\n");
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}
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