Commit | Line | Data |
---|---|---|
47aa95b6 | 1 | #ifndef lint |
29bac035 | 2 | static char *sccsid = "@(#)renice.c 4.6 (Berkeley) 83/07/24"; |
47aa95b6 SL |
3 | #endif |
4 | ||
ce4fd43b SL |
5 | #include <sys/time.h> |
6 | #include <sys/resource.h> | |
47aa95b6 SL |
7 | #include <stdio.h> |
8 | #include <pwd.h> | |
9 | ||
10 | /* | |
11 | * Change the priority (nice) of processes | |
12 | * or groups of processes which are already | |
13 | * running. | |
14 | */ | |
15 | main(argc, argv) | |
16 | char **argv; | |
17 | { | |
18 | int which = PRIO_PROCESS; | |
fe3b5491 | 19 | int who = 0, prio, errs = 0; |
47aa95b6 SL |
20 | |
21 | argc--, argv++; | |
a9ad9e31 | 22 | if (argc < 2) { |
29bac035 SL |
23 | fprintf(stderr, "usage: renice priority [ [ -p ] pids ] "); |
24 | fprintf(stderr, "[ [ -g ] pgrps ] [ [ -u ] users ]\n"); | |
6824099d | 25 | exit(1); |
47aa95b6 SL |
26 | } |
27 | prio = atoi(*argv); | |
28 | argc--, argv++; | |
29 | if (prio > PRIO_MAX) | |
30 | prio = PRIO_MAX; | |
31 | if (prio < PRIO_MIN) | |
32 | prio = PRIO_MIN; | |
47aa95b6 | 33 | for (; argc > 0; argc--, argv++) { |
6824099d SL |
34 | if (strcmp(*argv, "-g") == 0) { |
35 | which = PRIO_PGRP; | |
36 | continue; | |
37 | } | |
38 | if (strcmp(*argv, "-u") == 0) { | |
39 | which = PRIO_USER; | |
40 | continue; | |
41 | } | |
42 | if (strcmp(*argv, "-p") == 0) { | |
43 | which = PRIO_PROCESS; | |
44 | continue; | |
45 | } | |
47aa95b6 SL |
46 | if (which == PRIO_USER) { |
47 | register struct passwd *pwd = getpwnam(*argv); | |
48 | ||
49 | if (pwd == NULL) { | |
50 | fprintf(stderr, "renice: %s: unknown user\n", | |
51 | *argv); | |
52 | continue; | |
53 | } | |
fe3b5491 | 54 | who = pwd->pw_uid; |
47aa95b6 | 55 | } else { |
fe3b5491 SL |
56 | who = atoi(*argv); |
57 | if (who < 0) { | |
47aa95b6 SL |
58 | fprintf(stderr, "renice: %s: bad value\n", |
59 | *argv); | |
60 | continue; | |
61 | } | |
62 | } | |
fe3b5491 | 63 | errs += donice(which, who, prio); |
47aa95b6 SL |
64 | } |
65 | exit(errs != 0); | |
66 | } | |
67 | ||
fe3b5491 SL |
68 | donice(which, who, prio) |
69 | int which, who, prio; | |
70 | { | |
6824099d | 71 | int oldprio; |
fe3b5491 SL |
72 | extern int errno; |
73 | ||
6824099d | 74 | errno = 0, oldprio = getpriority(which, who); |
fe3b5491 SL |
75 | if (oldprio == -1 && errno) { |
76 | fprintf(stderr, "renice: %d: ", who); | |
77 | perror("getpriority"); | |
78 | return (1); | |
79 | } | |
80 | if (setpriority(which, who, prio) < 0) { | |
81 | fprintf(stderr, "renice: %d: ", who); | |
82 | perror("setpriority"); | |
83 | return (1); | |
84 | } | |
85 | printf("%d: old priority %d, new priority %d\n", who, oldprio, prio); | |
86 | return (0); | |
87 | } |