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1.15 ! deraadt 1: /* $OpenBSD: renice.c,v 1.14 2009/04/20 13:58:20 millert Exp $ */
1.2 deraadt 2:
1.1 deraadt 3: /*
1.13 millert 4: * Copyright (c) 2009 Todd C. Miller <Todd.Miller@courtesan.com>
1.1 deraadt 5: *
1.13 millert 6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
1.1 deraadt 9: *
1.13 millert 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1 deraadt 17: */
18:
19: #include <sys/types.h>
20: #include <sys/time.h>
21: #include <sys/resource.h>
1.5 millert 22:
1.13 millert 23: #include <ctype.h>
24: #include <err.h>
25: #include <errno.h>
26: #include <limits.h>
27: #include <pwd.h>
1.1 deraadt 28: #include <stdio.h>
1.3 deraadt 29: #include <stdlib.h>
1.11 david 30: #include <string.h>
1.13 millert 31:
32: struct renice_param {
33: int pri;
34: int type;
35: id_t id;
36: };
1.1 deraadt 37:
1.8 millert 38: int main(int, char **);
1.13 millert 39: static int renice(struct renice_param *, struct renice_param *);
40: __dead void usage(void);
1.3 deraadt 41:
42: int
1.13 millert 43: main(int argc, char **argv)
1.1 deraadt 44: {
1.13 millert 45: struct renice_param *params, *p;
46: struct passwd *pw;
47: int ch, type = PRIO_PROCESS;
48: int nflag = 0, pri = 0;
49: char *ep, *idstr;
50: const char *errstr;
51: long l;
1.1 deraadt 52:
1.13 millert 53: if (argc < 3)
1.5 millert 54: usage();
1.13 millert 55:
56: /* Allocate enough space for the worst case. */
57: params = p = calloc(argc - 1, sizeof(*params));
58: if (params == NULL)
59: err(1, NULL);
60:
61: /* Backwards compatibility: first arg may be priority. */
1.14 millert 62: if (isdigit((unsigned char)argv[1][0]) ||
63: (argv[1][0] == '-' && isdigit((unsigned char)argv[1][1]))) {
1.13 millert 64: argv[0] = "-n";
65: argc++;
66: argv--;
67: }
68:
69: /*
70: * Slightly tricky getopt() usage since it is legal to have
71: * option flags interleaved with arguments.
72: */
73: for (;;) {
74: if ((ch = getopt(argc, argv, "g:n:p:u:")) != -1) {
75: switch (ch) {
76: case 'g':
77: type = PRIO_PGRP;
78: idstr = optarg;
79: break;
80: case 'n':
81: l = strtol(optarg, &ep, 10);
82: if (*ep != '\0' || ep == optarg) {
83: warnx("invalid increment %s", optarg);
84: usage();
85: }
86: pri = l > PRIO_MAX ? PRIO_MAX :
87: l < PRIO_MIN ? PRIO_MIN : (int)l;
88:
89: /* Set priority for previous entries? */
90: if (!nflag) {
91: struct renice_param *pp;
92: for (pp = params; pp != p; pp++) {
93: pp->pri = pri;
94: }
95: }
96: nflag = 1;
97: continue;
98: case 'p':
99: type = PRIO_PROCESS;
100: idstr = optarg;
101: break;
102: case 'u':
103: type = PRIO_USER;
104: idstr = optarg;
105: break;
106: default:
107: usage();
108: break;
109: }
110: } else {
111: idstr = argv[optind++];
112: if (idstr == NULL)
113: break;
1.1 deraadt 114: }
1.13 millert 115: p->type = type;
116: p->pri = pri;
117: if (type == PRIO_USER) {
118: if ((pw = getpwnam(idstr)) == NULL) {
119: uid_t id = strtonum(idstr, 0, UID_MAX, &errstr);
120: if (!errstr)
121: pw = getpwuid(id);
122: }
123: if (pw == NULL) {
124: warnx("unknown user %s", idstr);
1.1 deraadt 125: continue;
126: }
1.13 millert 127: p->id = pw->pw_uid;
1.1 deraadt 128: } else {
1.13 millert 129: p->id = strtonum(idstr, 0, UINT_MAX, &errstr);
130: if (errstr) {
131: warnx("%s is %s", idstr, errstr);
1.1 deraadt 132: continue;
133: }
134: }
1.13 millert 135: p++;
1.1 deraadt 136: }
1.13 millert 137: if (!nflag)
138: usage();
139: exit(renice(params, p));
1.1 deraadt 140: }
141:
1.13 millert 142: static int
143: renice(struct renice_param *p, struct renice_param *end)
1.1 deraadt 144: {
1.13 millert 145: int old, errors = 0;
1.1 deraadt 146:
1.13 millert 147: for (; p < end; p++) {
148: errno = 0;
149: old = getpriority(p->type, p->id);
150: if (errno) {
151: warn("getpriority: %d", p->id);
152: errors++;
153: continue;
154: }
155: if (setpriority(p->type, p->id, p->pri) == -1) {
156: warn("setpriority: %d", p->id);
157: errors++;
158: continue;
159: }
160: printf("%d: old priority %d, new priority %d\n",
161: p->id, old, p->pri);
1.1 deraadt 162: }
1.13 millert 163: return (errors);
1.5 millert 164: }
165:
1.13 millert 166: __dead void
1.10 deraadt 167: usage(void)
1.5 millert 168: {
1.13 millert 169: fprintf(stderr, "usage: renice -n increment [[-g] pgrp ...] "
170: "[[-p] pid ...] [[-u] user ...]\n");
1.5 millert 171: exit(1);
1.1 deraadt 172: }