1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 23 /* All Rights Reserved */ 24 25 26 /* 27 * Copyright 2000-2003 Sun Microsystems, Inc. All rights reserved. 28 * Use is subject to license terms. 29 */ 30 31 #pragma ident "%Z%%M% %I% %E% SMI" 32 33 /* 34 ** nice 35 */ 36 37 38 #include <stdio.h> 39 #include <locale.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 #include <errno.h> 44 45 46 static void usage(void); 47 48 int 49 main(int argc, char *argv[]) 50 { 51 long nicarg = 10; 52 53 (void) setlocale(LC_ALL, ""); 54 #if !defined(TEXT_DOMAIN) 55 #define TEXT_DOMAIN "SYS_TEST" 56 #endif 57 (void) textdomain(TEXT_DOMAIN); 58 59 60 if (argc < 2) 61 usage(); 62 63 64 if (argv[1][0] == '-') { 65 if (strcmp(argv[1], "--") == 0) { 66 argv++; 67 argc--; 68 } else { 69 register char *p = argv[1]; 70 char *nicarg_str; 71 char *end_ptr; 72 73 if (*++p == 'n') { /* -n55 new form, XCU4 */ 74 /* 75 * for situations like -n-10 76 * else case assigns p instead of argv 77 */ 78 if (!(*++p)) { 79 /* Next arg is priority */ 80 argv++; 81 argc--; 82 if (argc < 2) 83 usage(); 84 nicarg_str = argv[1]; 85 } else { 86 /* Priority embedded eg. -n-10 */ 87 nicarg_str = p; 88 } 89 } else { /* -55 obs form, XCU4 */ 90 nicarg_str = &argv[1][1]; 91 } 92 nicarg = strtol(nicarg_str, &end_ptr, 10); 93 if (*end_ptr) { 94 (void) fprintf(stderr, 95 gettext("nice: argument must be numeric.\n")); 96 usage(); 97 } 98 99 if( --argc < 2 ) 100 usage(); 101 102 argv++; 103 if (strcmp(argv[1], "--") == 0) { 104 argv++; 105 argc--; 106 } 107 } 108 } 109 110 if (argc < 2) 111 usage(); 112 113 errno = 0; 114 if (nice(nicarg) == -1) { 115 /* 116 * Could be an error or a legitimate return value. 117 * The only error we care about is EINVAL, which will 118 * be returned by the scheduling class we are in if 119 * nice is invalid for this class. 120 * For any error other than EINVAL 121 * we will go ahead and exec the command even though 122 * the priority change failed. 123 */ 124 if (errno == EINVAL) { 125 (void) fprintf(stderr, gettext( 126 "nice: invalid operation; " 127 "scheduling class does not support nice\n")); 128 return (2); 129 } 130 } 131 (void) execvp(argv[1], &argv[1]); 132 (void) fprintf(stderr, gettext("%s: %s\n"), strerror(errno), argv[1]); 133 /* 134 * POSIX.2 exit status: 135 * 127 if utility is not found. 136 * 126 if utility cannot be invoked. 137 */ 138 return (errno == ENOENT || errno == ENOTDIR ? 127 : 126); 139 } 140 141 static void 142 usage() 143 { 144 (void) fprintf(stderr, 145 gettext("nice: usage: nice [-n increment] utility [argument ...]\n")); 146 exit(2); 147 } 148