Commit | Line | Data |
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47aa95b6 | 1 | #ifndef lint |
f683a5de | 2 | static char *sccsid = "@(#)renice.c 4.5 (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 SL |
22 | if (argc < 2) { |
23 | fprintf(stderr, "usage: renice priority who ...\n"); | |
6824099d | 24 | exit(1); |
47aa95b6 SL |
25 | } |
26 | prio = atoi(*argv); | |
27 | argc--, argv++; | |
28 | if (prio > PRIO_MAX) | |
29 | prio = PRIO_MAX; | |
30 | if (prio < PRIO_MIN) | |
31 | prio = PRIO_MIN; | |
47aa95b6 | 32 | for (; argc > 0; argc--, argv++) { |
6824099d SL |
33 | if (strcmp(*argv, "-g") == 0) { |
34 | which = PRIO_PGRP; | |
35 | continue; | |
36 | } | |
37 | if (strcmp(*argv, "-u") == 0) { | |
38 | which = PRIO_USER; | |
39 | continue; | |
40 | } | |
41 | if (strcmp(*argv, "-p") == 0) { | |
42 | which = PRIO_PROCESS; | |
43 | continue; | |
44 | } | |
47aa95b6 SL |
45 | if (which == PRIO_USER) { |
46 | register struct passwd *pwd = getpwnam(*argv); | |
47 | ||
48 | if (pwd == NULL) { | |
49 | fprintf(stderr, "renice: %s: unknown user\n", | |
50 | *argv); | |
51 | continue; | |
52 | } | |
fe3b5491 | 53 | who = pwd->pw_uid; |
47aa95b6 | 54 | } else { |
fe3b5491 SL |
55 | who = atoi(*argv); |
56 | if (who < 0) { | |
47aa95b6 SL |
57 | fprintf(stderr, "renice: %s: bad value\n", |
58 | *argv); | |
59 | continue; | |
60 | } | |
61 | } | |
fe3b5491 | 62 | errs += donice(which, who, prio); |
47aa95b6 SL |
63 | } |
64 | exit(errs != 0); | |
65 | } | |
66 | ||
fe3b5491 SL |
67 | donice(which, who, prio) |
68 | int which, who, prio; | |
69 | { | |
6824099d | 70 | int oldprio; |
fe3b5491 SL |
71 | extern int errno; |
72 | ||
6824099d | 73 | errno = 0, oldprio = getpriority(which, who); |
fe3b5491 SL |
74 | if (oldprio == -1 && errno) { |
75 | fprintf(stderr, "renice: %d: ", who); | |
76 | perror("getpriority"); | |
77 | return (1); | |
78 | } | |
79 | if (setpriority(which, who, prio) < 0) { | |
80 | fprintf(stderr, "renice: %d: ", who); | |
81 | perror("setpriority"); | |
82 | return (1); | |
83 | } | |
84 | printf("%d: old priority %d, new priority %d\n", who, oldprio, prio); | |
85 | return (0); | |
86 | } |