Commit | Line | Data |
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c018628f | 1 | /* |
f6470244 KB |
2 | * Copyright (c) 1983 The Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
6d936b27 | 5 | * %sccs.include.redist.c% |
c018628f DF |
6 | */ |
7 | ||
8 | #ifndef lint | |
9 | char copyright[] = | |
f6470244 | 10 | "@(#) Copyright (c) 1989 The Regents of the University of California.\n\ |
c018628f | 11 | All rights reserved.\n"; |
f6470244 | 12 | #endif /* not lint */ |
c018628f | 13 | |
47aa95b6 | 14 | #ifndef lint |
6d936b27 | 15 | static char sccsid[] = "@(#)renice.c 5.3 (Berkeley) %G%"; |
f6470244 | 16 | #endif /* not lint */ |
47aa95b6 | 17 | |
ce4fd43b SL |
18 | #include <sys/time.h> |
19 | #include <sys/resource.h> | |
47aa95b6 SL |
20 | #include <stdio.h> |
21 | #include <pwd.h> | |
22 | ||
23 | /* | |
24 | * Change the priority (nice) of processes | |
25 | * or groups of processes which are already | |
26 | * running. | |
27 | */ | |
28 | main(argc, argv) | |
29 | char **argv; | |
30 | { | |
31 | int which = PRIO_PROCESS; | |
fe3b5491 | 32 | int who = 0, prio, errs = 0; |
47aa95b6 SL |
33 | |
34 | argc--, argv++; | |
a9ad9e31 | 35 | if (argc < 2) { |
29bac035 SL |
36 | fprintf(stderr, "usage: renice priority [ [ -p ] pids ] "); |
37 | fprintf(stderr, "[ [ -g ] pgrps ] [ [ -u ] users ]\n"); | |
6824099d | 38 | exit(1); |
47aa95b6 SL |
39 | } |
40 | prio = atoi(*argv); | |
41 | argc--, argv++; | |
42 | if (prio > PRIO_MAX) | |
43 | prio = PRIO_MAX; | |
44 | if (prio < PRIO_MIN) | |
45 | prio = PRIO_MIN; | |
47aa95b6 | 46 | for (; argc > 0; argc--, argv++) { |
6824099d SL |
47 | if (strcmp(*argv, "-g") == 0) { |
48 | which = PRIO_PGRP; | |
49 | continue; | |
50 | } | |
51 | if (strcmp(*argv, "-u") == 0) { | |
52 | which = PRIO_USER; | |
53 | continue; | |
54 | } | |
55 | if (strcmp(*argv, "-p") == 0) { | |
56 | which = PRIO_PROCESS; | |
57 | continue; | |
58 | } | |
47aa95b6 SL |
59 | if (which == PRIO_USER) { |
60 | register struct passwd *pwd = getpwnam(*argv); | |
61 | ||
62 | if (pwd == NULL) { | |
63 | fprintf(stderr, "renice: %s: unknown user\n", | |
64 | *argv); | |
65 | continue; | |
66 | } | |
fe3b5491 | 67 | who = pwd->pw_uid; |
47aa95b6 | 68 | } else { |
fe3b5491 SL |
69 | who = atoi(*argv); |
70 | if (who < 0) { | |
47aa95b6 SL |
71 | fprintf(stderr, "renice: %s: bad value\n", |
72 | *argv); | |
73 | continue; | |
74 | } | |
75 | } | |
fe3b5491 | 76 | errs += donice(which, who, prio); |
47aa95b6 SL |
77 | } |
78 | exit(errs != 0); | |
79 | } | |
80 | ||
fe3b5491 SL |
81 | donice(which, who, prio) |
82 | int which, who, prio; | |
83 | { | |
6824099d | 84 | int oldprio; |
fe3b5491 SL |
85 | extern int errno; |
86 | ||
6824099d | 87 | errno = 0, oldprio = getpriority(which, who); |
fe3b5491 SL |
88 | if (oldprio == -1 && errno) { |
89 | fprintf(stderr, "renice: %d: ", who); | |
90 | perror("getpriority"); | |
91 | return (1); | |
92 | } | |
93 | if (setpriority(which, who, prio) < 0) { | |
94 | fprintf(stderr, "renice: %d: ", who); | |
95 | perror("setpriority"); | |
96 | return (1); | |
97 | } | |
98 | printf("%d: old priority %d, new priority %d\n", who, oldprio, prio); | |
99 | return (0); | |
100 | } |