projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 15637ed4 RG |
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, with or without | |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * 1. Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer. | |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer in the | |
| 12 | * documentation and/or other materials provided with the distribution. | |
| 13 | * 3. All advertising materials mentioning features or use of this software | |
| 14 | * must display the following acknowledgement: | |
| 15 | * This product includes software developed by the University of | |
| 16 | * California, Berkeley and its contributors. | |
| 17 | * 4. Neither the name of the University nor the names of its contributors | |
| 18 | * may be used to endorse or promote products derived from this software | |
| 19 | * without specific prior written permission. | |
| 20 | * | |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 31 | * SUCH DAMAGE. | |
| 32 | */ | |
| 33 | ||
| 34 | #ifndef lint | |
| 35 | char copyright[] = | |
| 36 | "@(#) Copyright (c) 1989 The Regents of the University of California.\n\ | |
| 37 | All rights reserved.\n"; | |
| 38 | #endif /* not lint */ | |
| 39 | ||
| 40 | #ifndef lint | |
| 41 | static char sccsid[] = "@(#)nice.c 5.4 (Berkeley) 6/1/90"; | |
| 42 | #endif /* not lint */ | |
| 43 | ||
| 44 | #include <sys/time.h> | |
| 45 | #include <sys/resource.h> | |
| 46 | #include <stdio.h> | |
| 47 | #include <ctype.h> | |
| 48 | ||
| 49 | #define DEFNICE 10 | |
| 50 | ||
| 51 | /* ARGSUSED */ | |
| 52 | main(argc, argv) | |
| 53 | int argc; | |
| 54 | char **argv; | |
| 55 | { | |
| 56 | extern int errno; | |
| 57 | int niceness; | |
| 58 | char *strerror(); | |
| 59 | ||
| 60 | niceness = DEFNICE; | |
| 61 | if (argv[1][0] == '-') | |
| 62 | if (isdigit(argv[1][1])) { | |
| 63 | niceness = atoi(argv[1] + 1); | |
| 64 | ++argv; | |
| 65 | } | |
| 66 | else { | |
| 67 | (void)fprintf(stderr, "nice: illegal option -- %c\n", | |
| 68 | argv[1][1]); | |
| 69 | usage(); | |
| 70 | } | |
| 71 | ||
| 72 | if (!argv[1]) | |
| 73 | usage(); | |
| 74 | ||
| 75 | errno = 0; | |
| 76 | niceness += getpriority(PRIO_PROCESS, 0); | |
| 77 | if (errno) { | |
| 78 | (void)fprintf(stderr, "nice: getpriority: %s\n", | |
| 79 | strerror(errno)); | |
| 80 | exit(1); | |
| 81 | } | |
| 82 | if (setpriority(PRIO_PROCESS, 0, niceness)) { | |
| 83 | (void)fprintf(stderr, | |
| 84 | "nice: setpriority: %s\n", strerror(errno)); | |
| 85 | exit(1); | |
| 86 | } | |
| 87 | execvp(argv[1], &argv[1]); | |
| 88 | (void)fprintf(stderr, | |
| 89 | "nice: %s: %s\n", argv[1], strerror(errno)); | |
| 90 | exit(1); | |
| 91 | } | |
| 92 | ||
| 93 | usage() | |
| 94 | { | |
| 95 | (void)fprintf(stderr, | |
| 96 | "nice [ -# ] command [ options ] [ operands ]\n"); | |
| 97 | exit(1); | |
| 98 | } |