Annotation of src/usr.bin/w/w.c, Revision 1.66
1.66 ! deraadt 1: /* $OpenBSD: w.c,v 1.65 2017/12/18 05:51:53 cheloha Exp $ */
1.4 deraadt 2:
1.1 deraadt 3: /*-
4: * Copyright (c) 1980, 1991, 1993, 1994
5: * The Regents of the University of California. All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
1.39 millert 15: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 16: * may be used to endorse or promote products derived from this software
17: * without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: */
31:
32: /*
33: * w - print system status (who and what)
34: *
35: * This program is similar to the systat command on Tenex/Tops 10/20
36: *
37: */
1.57 deraadt 38: #include <sys/param.h> /* MAXCOMLEN */
1.1 deraadt 39: #include <sys/time.h>
40: #include <sys/stat.h>
41: #include <sys/sysctl.h>
1.57 deraadt 42: #include <sys/signal.h>
1.1 deraadt 43: #include <sys/proc.h>
44: #include <sys/ioctl.h>
45: #include <sys/socket.h>
46: #include <sys/tty.h>
47:
48: #include <netinet/in.h>
49: #include <arpa/inet.h>
50:
51: #include <ctype.h>
52: #include <err.h>
53: #include <errno.h>
54: #include <fcntl.h>
55: #include <kvm.h>
56: #include <netdb.h>
57: #include <nlist.h>
58: #include <paths.h>
59: #include <stdio.h>
60: #include <stdlib.h>
61: #include <string.h>
62: #include <unistd.h>
1.5 deraadt 63: #include <limits.h>
1.1 deraadt 64: #include <utmp.h>
65: #include <vis.h>
66:
67: #include "extern.h"
68:
69: struct utmp utmp;
70: struct winsize ws;
71: kvm_t *kd;
72: time_t now; /* the current time of day */
73: int ttywidth; /* width of tty */
74: int argwidth; /* width of tty */
75: int header = 1; /* true if -h flag: don't print heading */
1.6 deraadt 76: int nflag = 1; /* true if -n flag: don't convert addrs */
1.49 jasper 77: int sortidle; /* sort by idle time */
1.1 deraadt 78: char *sel_user; /* login of particular user selected */
1.57 deraadt 79: char domain[HOST_NAME_MAX+1];
1.1 deraadt 80:
1.32 deraadt 81: #define NAME_WIDTH 8
82: #define HOST_WIDTH 16
83:
1.1 deraadt 84: /*
85: * One of these per active utmp entry.
86: */
87: struct entry {
88: struct entry *next;
89: struct utmp utmp;
1.41 millert 90: dev_t tdev; /* dev_t of terminal */
91: time_t idle; /* idle time of terminal in seconds */
1.48 guenther 92: struct kinfo_proc *kp; /* `most interesting' proc */
1.1 deraadt 93: } *ep, *ehead = NULL, **nextp = &ehead;
94:
1.62 schwarze 95: static void fmt_putc(int, int *);
96: static void fmt_puts(const char *, int *);
1.48 guenther 97: static void pr_args(struct kinfo_proc *);
1.35 millert 98: static void pr_header(time_t *, int);
1.1 deraadt 99: static struct stat
1.35 millert 100: *ttystat(char *);
101: static void usage(int);
1.1 deraadt 102:
103: int
1.38 deraadt 104: main(int argc, char *argv[])
1.1 deraadt 105: {
106: extern char *__progname;
1.48 guenther 107: struct kinfo_proc *kp;
1.1 deraadt 108: struct hostent *hp;
109: struct stat *stp;
110: FILE *ut;
1.27 deraadt 111: struct in_addr addr;
1.1 deraadt 112: int ch, i, nentries, nusers, wcmd;
113: char *memf, *nlistf, *p, *x;
1.57 deraadt 114: char buf[HOST_NAME_MAX+1], errbuf[_POSIX2_LINE_MAX];
1.60 deraadt 115:
1.1 deraadt 116: /* Are we w(1) or uptime(1)? */
117: p = __progname;
118: if (*p == '-')
119: p++;
1.19 mickey 120: if (p[0] == 'w' && p[1] == '\0') {
121: wcmd = 1;
122: p = "hiflM:N:asuw";
123: } else if (!strcmp(p, "uptime")) {
1.1 deraadt 124: wcmd = 0;
1.45 jaredy 125: p = "";
1.19 mickey 126: } else
1.20 kstailey 127: errx(1,
128: "this program should be invoked only as \"w\" or \"uptime\"");
1.1 deraadt 129:
130: memf = nlistf = NULL;
1.12 millert 131: while ((ch = getopt(argc, argv, p)) != -1)
1.1 deraadt 132: switch (ch) {
133: case 'h':
134: header = 0;
135: break;
136: case 'i':
137: sortidle = 1;
138: break;
139: case 'M':
140: header = 0;
141: memf = optarg;
142: break;
143: case 'N':
144: nlistf = optarg;
145: break;
1.6 deraadt 146: case 'a':
147: nflag = 0;
1.1 deraadt 148: break;
149: case 'f': case 'l': case 's': case 'u': case 'w':
150: warnx("[-flsuw] no longer supported");
151: /* FALLTHROUGH */
152: case '?':
153: default:
154: usage(wcmd);
155: }
156: argc -= optind;
157: argv += optind;
1.61 deraadt 158:
159: if (nflag == 0) {
160: if (pledge("stdio tty rpath dns ps vminfo", NULL) == -1)
161: err(1, "pledge");
162: } else {
163: if (pledge("stdio tty rpath ps vminfo", NULL) == -1)
164: err(1, "pledge");
165: }
1.1 deraadt 166:
1.37 angelos 167: if (nlistf == NULL && memf == NULL) {
1.38 deraadt 168: if ((kd = kvm_openfiles(nlistf, memf, NULL, KVM_NO_FILES,
169: errbuf)) == NULL)
1.37 angelos 170: errx(1, "%s", errbuf);
171: } else {
172: if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
173: errx(1, "%s", errbuf);
1.11 tholo 174: }
1.1 deraadt 175:
176: (void)time(&now);
177: if ((ut = fopen(_PATH_UTMP, "r")) == NULL)
178: err(1, "%s", _PATH_UTMP);
179:
180: if (*argv)
181: sel_user = *argv;
182:
183: for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) {
184: if (utmp.ut_name[0] == '\0')
185: continue;
186: ++nusers;
187: if (wcmd == 0 || (sel_user &&
188: strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0))
189: continue;
1.33 smart 190: if ((ep = calloc(1, sizeof(*ep))) == NULL)
1.1 deraadt 191: err(1, NULL);
192: *nextp = ep;
193: nextp = &(ep->next);
1.33 smart 194: memcpy(&(ep->utmp), &utmp, sizeof(utmp));
1.1 deraadt 195: if (!(stp = ttystat(ep->utmp.ut_line)))
196: continue;
197: ep->tdev = stp->st_rdev;
1.50 kettenis 198:
1.1 deraadt 199: /*
200: * If this is the console device, attempt to ascertain
201: * the true console device dev_t.
202: */
203: if (ep->tdev == 0) {
204: int mib[2];
205: size_t size;
206:
1.50 kettenis 207: mib[0] = CTL_KERN;
208: mib[1] = KERN_CONSDEV;
1.1 deraadt 209: size = sizeof(dev_t);
210: (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0);
211: }
1.50 kettenis 212:
1.1 deraadt 213: if ((ep->idle = now - stp->st_atime) < 0)
214: ep->idle = 0;
215: }
216: (void)fclose(ut);
217:
218: if (header || wcmd == 0) {
219: pr_header(&now, nusers);
220: if (wcmd == 0)
221: exit (0);
222: }
223:
1.30 deraadt 224: #define HEADER "USER TTY FROM LOGIN@ IDLE WHAT"
1.33 smart 225: #define WUSED (sizeof(HEADER) - sizeof("WHAT"))
1.64 jasper 226: if (header)
227: (void)puts(HEADER);
1.1 deraadt 228:
1.48 guenther 229: kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, sizeof(*kp), &nentries);
1.41 millert 230: if (kp == NULL)
1.2 deraadt 231: errx(1, "%s", kvm_geterr(kd));
1.59 deraadt 232:
233: if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
234: ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
235: ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0)
236: ttywidth = 79;
237: else
238: ttywidth = ws.ws_col - 1;
239: argwidth = ttywidth - WUSED;
240: if (argwidth < 4)
241: argwidth = 8;
242:
1.1 deraadt 243: for (i = 0; i < nentries; i++, kp++) {
1.55 guenther 244: if (kp->p_psflags & (PS_EMBRYO | PS_ZOMBIE))
1.1 deraadt 245: continue;
246: for (ep = ehead; ep != NULL; ep = ep->next) {
1.7 downsj 247: /* ftp is a special case. */
248: if (strncmp(ep->utmp.ut_line, "ftp", 3) == 0) {
1.26 millert 249: char pidstr[UT_LINESIZE-2];
250: pid_t fp;
251:
252: (void)strncpy(pidstr, &ep->utmp.ut_line[3],
253: sizeof(pidstr) - 1);
254: pidstr[sizeof(pidstr) - 1] = '\0';
255: fp = (pid_t)strtol(pidstr, NULL, 10);
1.41 millert 256: if (kp->p_pid == fp) {
1.7 downsj 257: ep->kp = kp;
258: break;
259: }
1.41 millert 260: } else if (ep->tdev == kp->p_tdev &&
261: kp->p__pgid == kp->p_tpgid) {
1.1 deraadt 262: /*
263: * Proc is in foreground of this terminal
264: */
1.41 millert 265: if (proc_compare(ep->kp, kp))
1.1 deraadt 266: ep->kp = kp;
267: break;
268: }
269: }
270: }
271: /* sort by idle time */
272: if (sortidle && ehead != NULL) {
273: struct entry *from = ehead, *save;
1.44 deraadt 274:
1.1 deraadt 275: ehead = NULL;
276: while (from != NULL) {
277: for (nextp = &ehead;
278: (*nextp) && from->idle >= (*nextp)->idle;
279: nextp = &(*nextp)->next)
280: continue;
281: save = from;
282: from = from->next;
283: save->next = *nextp;
284: *nextp = save;
285: }
286: }
1.44 deraadt 287:
1.34 deraadt 288: if (!nflag) {
1.66 ! deraadt 289: if (gethostname(domain, sizeof(domain)) == -1 ||
1.1 deraadt 290: (p = strchr(domain, '.')) == 0)
291: domain[0] = '\0';
292: else {
293: domain[sizeof(domain) - 1] = '\0';
294: memmove(domain, p, strlen(p) + 1);
295: }
1.34 deraadt 296: }
1.1 deraadt 297:
298: for (ep = ehead; ep != NULL; ep = ep->next) {
299: p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-";
1.16 millert 300: for (x = NULL, i = 0; p[i] != '\0' && i < UT_HOSTSIZE; i++)
301: if (p[i] == ':') {
302: x = &p[i];
303: *x++ = '\0';
304: break;
305: }
1.27 deraadt 306: if (!nflag && inet_aton(p, &addr) &&
307: (hp = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET))) {
1.1 deraadt 308: if (domain[0] != '\0') {
309: p = hp->h_name;
310: p += strlen(hp->h_name);
311: p -= strlen(domain);
1.31 deraadt 312: if (p > hp->h_name &&
313: strcasecmp(p, domain) == 0)
1.1 deraadt 314: *p = '\0';
315: }
316: p = hp->h_name;
317: }
318: if (x) {
319: (void)snprintf(buf, sizeof(buf), "%s:%.*s", p,
1.34 deraadt 320: (int)(ep->utmp.ut_host + UT_HOSTSIZE - x), x);
1.1 deraadt 321: p = buf;
322: }
1.22 deraadt 323: (void)printf("%-*.*s %-2.2s %-*.*s ",
1.32 deraadt 324: NAME_WIDTH, UT_NAMESIZE, ep->utmp.ut_name,
1.1 deraadt 325: strncmp(ep->utmp.ut_line, "tty", 3) ?
326: ep->utmp.ut_line : ep->utmp.ut_line + 3,
1.32 deraadt 327: HOST_WIDTH, HOST_WIDTH, *p ? p : "-");
1.1 deraadt 328: pr_attime(&ep->utmp.ut_time, &now);
329: pr_idle(ep->idle);
330: pr_args(ep->kp);
331: printf("\n");
332: }
333: exit(0);
334: }
1.62 schwarze 335:
336: static void
337: fmt_putc(int c, int *leftp)
338: {
339:
340: if (*leftp == 0)
341: return;
342: if (*leftp != -1)
343: *leftp -= 1;
344: putchar(c);
345: }
346:
347: static void
348: fmt_puts(const char *s, int *leftp)
349: {
350: static char *v = NULL;
351: static size_t maxlen = 0;
352: size_t len;
353:
354: if (*leftp == 0)
355: return;
356: len = strlen(s) * 4 + 1;
357: if (len > maxlen) {
358: free(v);
359: maxlen = 0;
360: if (len < getpagesize())
361: len = getpagesize();
362: v = malloc(len);
363: if (v == NULL)
364: return;
365: maxlen = len;
366: }
367: strvis(v, s, VIS_TAB | VIS_NL | VIS_CSTYLE);
368: if (*leftp != -1) {
369: len = strlen(v);
370: if (len > *leftp) {
371: v[*leftp] = '\0';
372: *leftp = 0;
373: } else
374: *leftp -= len;
375: }
376: printf("%s", v);
377: }
378:
1.1 deraadt 379:
380: static void
1.48 guenther 381: pr_args(struct kinfo_proc *kp)
1.1 deraadt 382: {
1.7 downsj 383: char **argv, *str;
1.1 deraadt 384: int left;
385:
1.23 millert 386: if (kp == NULL)
1.63 jca 387: goto nothing; /* no matching process found */
1.1 deraadt 388: left = argwidth;
1.48 guenther 389: argv = kvm_getargv(kd, kp, argwidth+60); /* +60 for ftpd snip */
1.23 millert 390: if (argv == NULL)
1.1 deraadt 391: goto nothing;
1.7 downsj 392:
1.23 millert 393: if (*argv == NULL || **argv == '\0') {
394: /* Process has zeroed argv[0], display executable name. */
395: fmt_putc('(', &left);
1.41 millert 396: fmt_puts(kp->p_comm, &left);
1.23 millert 397: fmt_putc(')', &left);
398: }
1.1 deraadt 399: while (*argv) {
1.46 millert 400: /*
401: * ftp argv[0] is in the following format:
402: * ftpd: HOSTNAME: [USER/PASS: ]CMD args (ftpd)
403: */
1.7 downsj 404: if (strncmp(*argv, "ftpd:", 5) == 0) {
1.46 millert 405: if ((str = strchr(*argv + 5, ':')) != NULL)
406: str = strchr(str + 1, ':');
407: if (str != NULL) {
1.54 deraadt 408: if ((str[0] == ':') &&
409: isspace((unsigned char)str[1]))
1.7 downsj 410: str += 2;
411: fmt_puts(str, &left);
412: } else
413: fmt_puts(*argv, &left);
414: } else
415: fmt_puts(*argv, &left);
1.1 deraadt 416: argv++;
417: fmt_putc(' ', &left);
418: }
419: return;
420: nothing:
421: putchar('-');
422: }
423:
424: static void
1.38 deraadt 425: pr_header(time_t *nowp, int nusers)
1.1 deraadt 426: {
427: double avenrun[3];
1.65 cheloha 428: struct timespec boottime;
1.1 deraadt 429: time_t uptime;
430: int days, hrs, i, mins;
431: char buf[256];
432:
433: /*
434: * Print time of day.
435: */
1.40 millert 436: (void)strftime(buf, sizeof(buf) - 1, "%l:%M%p", localtime(nowp));
1.33 smart 437: buf[sizeof(buf) - 1] = '\0';
1.1 deraadt 438: (void)printf("%s ", buf);
439:
440: /*
441: * Print how long system has been up.
442: */
1.65 cheloha 443: if (clock_gettime(CLOCK_BOOTTIME, &boottime) != -1) {
444: uptime = boottime.tv_sec;
1.19 mickey 445: if (uptime > 59) {
1.17 deraadt 446: uptime += 30;
447: days = uptime / SECSPERDAY;
448: uptime %= SECSPERDAY;
449: hrs = uptime / SECSPERHOUR;
450: uptime %= SECSPERHOUR;
1.58 millert 451: mins = uptime / 60;
1.17 deraadt 452: (void)printf(" up");
453: if (days > 0)
454: (void)printf(" %d day%s,", days,
455: days > 1 ? "s" : "");
456: if (hrs > 0 && mins > 0)
457: (void)printf(" %2d:%02d,", hrs, mins);
458: else {
459: if (hrs > 0)
460: (void)printf(" %d hr%s,",
461: hrs, hrs > 1 ? "s" : "");
462: if (mins > 0 || (days == 0 && hrs == 0))
463: (void)printf(" %d min%s,",
464: mins, mins != 1 ? "s" : "");
465: }
466: } else
1.52 guenther 467: printf(" %d secs,", (int)uptime);
1.1 deraadt 468: }
469:
470: /* Print number of users logged in to system */
471: (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : "");
472:
473: /*
474: * Print 1, 5, and 15 minute load averages.
475: */
476: if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1)
477: (void)printf(", no load average information available\n");
478: else {
479: (void)printf(", load averages:");
480: for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) {
481: if (i > 0)
482: (void)printf(",");
483: (void)printf(" %.2f", avenrun[i]);
484: }
485: (void)printf("\n");
486: }
487: }
488:
489: static struct stat *
1.38 deraadt 490: ttystat(char *line)
1.1 deraadt 491: {
492: static struct stat sb;
1.26 millert 493: char ttybuf[sizeof(_PATH_DEV) + UT_LINESIZE];
1.1 deraadt 494:
1.26 millert 495: /* Note, line may not be NUL-terminated */
1.33 smart 496: (void)strlcpy(ttybuf, _PATH_DEV, sizeof(ttybuf));
497: (void)strncat(ttybuf, line, sizeof(ttybuf) - 1 - strlen(ttybuf));
1.1 deraadt 498: if (stat(ttybuf, &sb))
499: return (NULL);
500: return (&sb);
501: }
502:
503: static void
1.38 deraadt 504: usage(int wcmd)
1.1 deraadt 505: {
506: if (wcmd)
507: (void)fprintf(stderr,
1.42 jmc 508: "usage: w [-ahi] [-M core] [-N system] [user]\n");
1.1 deraadt 509: else
1.33 smart 510: (void)fprintf(stderr,
1.45 jaredy 511: "usage: uptime\n");
1.1 deraadt 512: exit (1);
513: }
![[BACK]](/icons/back.gif){kind=icon}
Return to w.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / w