1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #ifndef lint 19 char copyright[] = 20 "@(#) Copyright (c) 1989 The Regents of the University of California.\n\ 21 All rights reserved.\n"; 22 #endif /* not lint */ 23 24 #ifndef lint 25 static char sccsid[] = "@(#)nice.c 5.3 (Berkeley) 05/20/89"; 26 #endif /* not lint */ 27 28 #include <sys/time.h> 29 #include <sys/resource.h> 30 #include <stdio.h> 31 #include <ctype.h> 32 33 #define DEFNICE 10 34 35 /* ARGSUSED */ 36 main(argc, argv) 37 int argc; 38 char **argv; 39 { 40 extern int errno; 41 int niceness; 42 char *strerror(); 43 44 niceness = DEFNICE; 45 if (argv[1][0] == '-') 46 if (isdigit(argv[1][1])) { 47 niceness = atoi(argv[1] + 1); 48 ++argv; 49 } 50 else { 51 (void)fprintf(stderr, "nice: illegal option -- %c\n", 52 argv[1][1]); 53 usage(); 54 } 55 56 if (!argv[1]) 57 usage(); 58 59 errno = 0; 60 niceness += getpriority(PRIO_PROCESS, 0); 61 if (errno) { 62 (void)fprintf(stderr, "nice: getpriority: %s\n", 63 strerror(errno)); 64 exit(1); 65 } 66 if (setpriority(PRIO_PROCESS, 0, niceness)) { 67 (void)fprintf(stderr, 68 "nice: setpriority: %s\n", strerror(errno)); 69 exit(1); 70 } 71 execvp(argv[1], &argv[1]); 72 (void)fprintf(stderr, 73 "nice: %s: %s\n", argv[1], strerror(errno)); 74 exit(1); 75 } 76 77 usage() 78 { 79 (void)fprintf(stderr, 80 "nice [ -# ] command [ options ] [ operands ]\n"); 81 exit(1); 82 } 83