1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2013 Gary Mills
23 *
24 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
25 * Use is subject to license terms.
26 */
27
28 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
29 /* All Rights Reserved */
30
31 /*
32 * University Copyright- Copyright (c) 1982, 1986, 1988
33 * The Regents of the University of California
34 * All Rights Reserved
35 *
36 * University Acknowledgment- Portions of this document are derived from
37 * software developed by the University of California, Berkeley, and its
38 * contributors.
39 */
40
41 /*
42 * This is the new whodo command which takes advantage of
43 * the /proc interface to gain access to the information
44 * of all the processes currently on the system.
45 *
46 * Maintenance note:
47 *
48 * Much of this code is replicated in w.c. If you're
49 * fixing bugs here, then you should probably fix 'em there too.
50 */
51
52 #include <stdio.h>
53 #include <string.h>
54 #include <stdlib.h>
55 #include <ctype.h>
56 #include <fcntl.h>
57 #include <time.h>
58 #include <errno.h>
59 #include <sys/types.h>
60 #include <utmpx.h>
61 #include <sys/utsname.h>
62 #include <sys/stat.h>
63 #include <sys/mkdev.h>
64 #include <dirent.h>
65 #include <procfs.h> /* /proc header file */
66 #include <sys/wait.h>
67 #include <locale.h>
68 #include <unistd.h>
69 #include <limits.h>
70 #include <priv_utils.h>
71
72 /*
73 * Use the full lengths from utmpx for user and line.
74 */
75 #define NMAX (sizeof (((struct utmpx *)0)->ut_user))
76 #define LMAX (sizeof (((struct utmpx *)0)->ut_line))
77
78 /* Print minimum field widths. */
79 #define LOGIN_WIDTH 8
80 #define LINE_WIDTH 12
81
82 #define DIV60(t) ((t+30)/60) /* x/60 rounded */
83
84 #ifdef ERR
85 #undef ERR
86 #endif
87 #define ERR (-1)
88
89 #define DEVNAMELEN 14
90 #define HSIZE 256 /* size of process hash table */
91 #define PROCDIR "/proc"
92 #define INITPROCESS (pid_t)1 /* init process pid */
93 #define NONE 'n' /* no state */
94 #define RUNNING 'r' /* runnable process */
95 #define ZOMBIE 'z' /* zombie process */
96 #define VISITED 'v' /* marked node as visited */
97
98 static int ndevs; /* number of configured devices */
99 static int maxdev; /* slots for configured devices */
100 #define DNINCR 100
101 static struct devl { /* device list */
102 char dname[DEVNAMELEN]; /* device name */
103 dev_t ddev; /* device number */
104 } *devl;
105
106 struct uproc {
107 pid_t p_upid; /* user process id */
108 char p_state; /* numeric value of process state */
109 dev_t p_ttyd; /* controlling tty of process */
110 time_t p_time; /* ticks of user & system time */
111 time_t p_ctime; /* ticks of child user & system time */
112 int p_igintr; /* 1=ignores SIGQUIT and SIGINT */
113 char p_comm[PRARGSZ+1]; /* command */
114 char p_args[PRARGSZ+1]; /* command line arguments */
115 struct uproc *p_child, /* first child pointer */
116 *p_sibling, /* sibling pointer */
117 *p_pgrplink, /* pgrp link */
118 *p_link; /* hash table chain pointer */
119 };
120
121 /*
122 * define hash table for struct uproc
123 * Hash function uses process id
124 * and the size of the hash table(HSIZE)
125 * to determine process index into the table.
126 */
127 static struct uproc pr_htbl[HSIZE];
128
129 static struct uproc *findhash(pid_t);
130 static time_t findidle(char *);
131 static void clnarglist(char *);
132 static void showproc(struct uproc *);
133 static void showtotals(struct uproc *);
134 static void calctotals(struct uproc *);
135 static char *getty(dev_t);
136 static void prttime(time_t, char *);
137 static void prtat(time_t *);
138 static void checkampm(char *);
139
140 static char *prog;
141 static int header = 1; /* true if -h flag: don't print heading */
142 static int lflag = 0; /* true if -l flag: w command format */
143 static char *sel_user; /* login of particular user selected */
144 static time_t now; /* current time of day */
145 static time_t uptime; /* time of last reboot & elapsed time since */
146 static int nusers; /* number of users logged in now */
147 static time_t idle; /* number of minutes user is idle */
148 static time_t jobtime; /* total cpu time visible */
149 static char doing[520]; /* process attached to terminal */
150 static time_t proctime; /* cpu time of process in doing */
151 static int empty;
152 static pid_t curpid;
153
154 #if SIGQUIT > SIGINT
155 #define ACTSIZE SIGQUIT
156 #else
157 #define ACTSIZE SIGINT
158 #endif
159
160 int
161 main(int argc, char *argv[])
162 {
163 struct utmpx *ut;
164 struct utmpx *utmpbegin;
165 struct utmpx *utmpend;
166 struct utmpx *utp;
167 struct tm *tm;
168 struct uproc *up, *parent, *pgrp;
169 struct psinfo info;
170 struct sigaction actinfo[ACTSIZE];
171 struct pstatus statinfo;
172 size_t size;
173 struct stat sbuf;
174 struct utsname uts;
175 DIR *dirp;
176 struct dirent *dp;
177 char pname[64];
178 char *fname;
179 int procfd;
180 int i;
181 int days, hrs, mins;
182 int entries;
183
184 /*
185 * This program needs the proc_owner privilege
186 */
187 (void) __init_suid_priv(PU_CLEARLIMITSET, PRIV_PROC_OWNER,
188 (char *)NULL);
189
190 (void) setlocale(LC_ALL, "");
191 #if !defined(TEXT_DOMAIN)
192 #define TEXT_DOMAIN "SYS_TEST"
193 #endif
194 (void) textdomain(TEXT_DOMAIN);
195
196 prog = argv[0];
197
198 while (argc > 1) {
199 if (argv[1][0] == '-') {
200 for (i = 1; argv[1][i]; i++) {
201 switch (argv[1][i]) {
202
203 case 'h':
204 header = 0;
205 break;
206
207 case 'l':
208 lflag++;
209 break;
210
211 default:
212 (void) printf(gettext(
213 "usage: %s [ -hl ] [ user ]\n"),
214 prog);
215 exit(1);
216 }
217 }
218 } else {
219 if (!isalnum(argv[1][0]) || argc > 2) {
220 (void) printf(gettext(
221 "usage: %s [ -hl ] [ user ]\n"), prog);
222 exit(1);
223 } else
224 sel_user = argv[1];
225 }
226 argc--; argv++;
227 }
228
229 /*
230 * read the UTMPX_FILE (contains information about
231 * each logged in user)
232 */
233 if (stat(UTMPX_FILE, &sbuf) == ERR) {
234 (void) fprintf(stderr, gettext("%s: stat error of %s: %s\n"),
235 prog, UTMPX_FILE, strerror(errno));
236 exit(1);
237 }
238 entries = sbuf.st_size / sizeof (struct futmpx);
239 size = sizeof (struct utmpx) * entries;
240
241 if ((ut = malloc(size)) == NULL) {
242 (void) fprintf(stderr, gettext("%s: malloc error of %s: %s\n"),
243 prog, UTMPX_FILE, strerror(errno));
244 exit(1);
245 }
246
247 (void) utmpxname(UTMPX_FILE);
248
249 utmpbegin = ut;
250 /* LINTED pointer cast may result in improper alignment */
251 utmpend = (struct utmpx *)((char *)utmpbegin + size);
252
253 setutxent();
254 while ((ut < utmpend) && ((utp = getutxent()) != NULL))
255 (void) memcpy(ut++, utp, sizeof (*ut));
256 endutxent();
257
258 (void) time(&now); /* get current time */
259
260 if (header) { /* print a header */
261 if (lflag) { /* w command format header */
262 prtat(&now);
263 for (ut = utmpbegin; ut < utmpend; ut++) {
264 if (ut->ut_type == USER_PROCESS) {
265 nusers++;
266 } else if (ut->ut_type == BOOT_TIME) {
267 uptime = now - ut->ut_xtime;
268 uptime += 30;
269 days = uptime / (60*60*24);
270 uptime %= (60*60*24);
271 hrs = uptime / (60*60);
272 uptime %= (60*60);
273 mins = uptime / 60;
274
275 (void) printf(dcgettext(NULL,
276 " up %d day(s), %d hr(s), "
277 "%d min(s)", LC_TIME),
278 days, hrs, mins);
279 }
280 }
281
282 ut = utmpbegin; /* rewind utmp data */
283 (void) printf(dcgettext(NULL,
284 " %d user(s)\n", LC_TIME), nusers);
285 (void) printf(dcgettext(NULL, "User tty "
286 "login@ idle JCPU PCPU what\n", LC_TIME));
287 } else { /* standard whodo header */
288 char date_buf[100];
289
290 /*
291 * print current time and date
292 */
293 (void) strftime(date_buf, sizeof (date_buf),
294 dcgettext(NULL, "%C", LC_TIME), localtime(&now));
295 (void) printf("%s\n", date_buf);
296
297 /*
298 * print system name
299 */
300 (void) uname(&uts);
301 (void) printf("%s\n", uts.nodename);
302 }
303 }
304
305 /*
306 * loop through /proc, reading info about each process
307 * and build the parent/child tree
308 */
309 if (!(dirp = opendir(PROCDIR))) {
310 (void) fprintf(stderr, gettext("%s: could not open %s: %s\n"),
311 prog, PROCDIR, strerror(errno));
312 exit(1);
313 }
314
315 while ((dp = readdir(dirp)) != NULL) {
316 if (dp->d_name[0] == '.')
317 continue;
318 retry:
319 (void) snprintf(pname, sizeof (pname),
320 "%s/%s/", PROCDIR, dp->d_name);
321 fname = pname + strlen(pname);
322 (void) strcpy(fname, "psinfo");
323 if ((procfd = open(pname, O_RDONLY)) < 0)
324 continue;
325 if (read(procfd, &info, sizeof (info)) != sizeof (info)) {
326 int err = errno;
327 (void) close(procfd);
328 if (err == EAGAIN)
329 goto retry;
330 if (err != ENOENT)
331 (void) fprintf(stderr, gettext(
332 "%s: read() failed on %s: %s\n"),
333 prog, pname, strerror(err));
334 continue;
335 }
336 (void) close(procfd);
337
338 up = findhash(info.pr_pid);
339 up->p_ttyd = info.pr_ttydev;
340 up->p_state = (info.pr_nlwp == 0? ZOMBIE : RUNNING);
341 up->p_time = 0;
342 up->p_ctime = 0;
343 up->p_igintr = 0;
344 (void) strncpy(up->p_comm, info.pr_fname,
345 sizeof (info.pr_fname));
346 up->p_args[0] = 0;
347
348 if (up->p_state != NONE && up->p_state != ZOMBIE) {
349 (void) strcpy(fname, "status");
350
351 /* now we need the proc_owner privilege */
352 (void) __priv_bracket(PRIV_ON);
353
354 procfd = open(pname, O_RDONLY);
355
356 /* drop proc_owner privilege after open */
357 (void) __priv_bracket(PRIV_OFF);
358
359 if (procfd < 0)
360 continue;
361
362 if (read(procfd, &statinfo, sizeof (statinfo))
363 != sizeof (statinfo)) {
364 int err = errno;
365 (void) close(procfd);
366 if (err == EAGAIN)
367 goto retry;
368 if (err != ENOENT)
369 (void) fprintf(stderr, gettext(
370 "%s: read() failed on %s: %s \n"),
371 prog, pname, strerror(err));
372 continue;
373 }
374 (void) close(procfd);
375
376 up->p_time = statinfo.pr_utime.tv_sec +
377 statinfo.pr_stime.tv_sec;
378 up->p_ctime = statinfo.pr_cutime.tv_sec +
379 statinfo.pr_cstime.tv_sec;
380
381 (void) strcpy(fname, "sigact");
382
383 /* now we need the proc_owner privilege */
384 (void) __priv_bracket(PRIV_ON);
385
386 procfd = open(pname, O_RDONLY);
387
388 /* drop proc_owner privilege after open */
389 (void) __priv_bracket(PRIV_OFF);
390
391 if (procfd < 0)
392 continue;
393 if (read(procfd, actinfo, sizeof (actinfo))
394 != sizeof (actinfo)) {
395 int err = errno;
396 (void) close(procfd);
397 if (err == EAGAIN)
398 goto retry;
399 if (err != ENOENT)
400 (void) fprintf(stderr, gettext(
401 "%s: read() failed on %s: %s \n"),
402 prog, pname, strerror(err));
403 continue;
404 }
405 (void) close(procfd);
406
407 up->p_igintr =
408 actinfo[SIGINT-1].sa_handler == SIG_IGN &&
409 actinfo[SIGQUIT-1].sa_handler == SIG_IGN;
410
411 up->p_args[0] = 0;
412
413 /*
414 * Process args if there's a chance we'll print it.
415 */
416 if (lflag) { /* w command needs args */
417 clnarglist(info.pr_psargs);
418 (void) strcpy(up->p_args, info.pr_psargs);
419 if (up->p_args[0] == 0 ||
420 up->p_args[0] == '-' &&
421 up->p_args[1] <= ' ' ||
422 up->p_args[0] == '?') {
423 (void) strcat(up->p_args, " (");
424 (void) strcat(up->p_args, up->p_comm);
425 (void) strcat(up->p_args, ")");
426 }
427 }
428
429 }
430
431 /*
432 * link pgrp together in case parents go away
433 * Pgrp chain is a single linked list originating
434 * from the pgrp leader to its group member.
435 */
436 if (info.pr_pgid != info.pr_pid) { /* not pgrp leader */
437 pgrp = findhash(info.pr_pgid);
438 up->p_pgrplink = pgrp->p_pgrplink;
439 pgrp->p_pgrplink = up;
440 }
441 parent = findhash(info.pr_ppid);
442
443 /* if this is the new member, link it in */
444 if (parent->p_upid != INITPROCESS) {
445 if (parent->p_child) {
446 up->p_sibling = parent->p_child;
447 up->p_child = 0;
448 }
449 parent->p_child = up;
450 }
451
452 }
453
454 /* revert to non-privileged user */
455 (void) __priv_relinquish();
456
457 (void) closedir(dirp);
458 (void) time(&now); /* get current time */
459
460 /*
461 * loop through utmpx file, printing process info
462 * about each logged in user
463 */
464 for (ut = utmpbegin; ut < utmpend; ut++) {
465 time_t tim;
466
467 if (ut->ut_type != USER_PROCESS)
468 continue;
469 if (sel_user && strncmp(ut->ut_name, sel_user, NMAX) != 0)
470 continue; /* we're looking for somebody else */
471 if (lflag) { /* -l flag format (w command) */
472 /* print login name of the user */
473 (void) printf("%-*.*s ", LOGIN_WIDTH, (int)NMAX,
474 ut->ut_name);
475
476 /* print tty user is on */
477 (void) printf("%-*.*s", LINE_WIDTH, (int)LMAX,
478 ut->ut_line);
479
480 /* print when the user logged in */
481 tim = ut->ut_xtime;
482 (void) prtat(&tim);
483
484 /* print idle time */
485 idle = findidle(ut->ut_line);
486 if (idle >= 36 * 60)
487 (void) printf(dcgettext(NULL, "%2ddays ",
488 LC_TIME), (idle + 12 * 60) / (24 * 60));
489 else
490 prttime(idle, " ");
491 showtotals(findhash((pid_t)ut->ut_pid));
492 } else { /* standard whodo format */
493 tim = ut->ut_xtime;
494 tm = localtime(&tim);
495 (void) printf("\n%-*.*s %-*.*s %2.1d:%2.2d\n",
496 LINE_WIDTH, (int)LMAX, ut->ut_line,
497 LOGIN_WIDTH, (int)NMAX, ut->ut_name, tm->tm_hour,
498 tm->tm_min);
499 showproc(findhash((pid_t)ut->ut_pid));
500 }
501 }
502
503 return (0);
504 }
505
506 /*
507 * Used for standard whodo format.
508 * This is the recursive routine descending the process
509 * tree starting from the given process pointer(up).
510 * It used depth-first search strategy and also marked
511 * each node as printed as it traversed down the tree.
512 */
513 static void
514 showproc(struct uproc *up)
515 {
516 struct uproc *zp;
517
518 if (up->p_state == VISITED) /* we already been here */
519 return;
520 /* print the data for this process */
521 if (up->p_state == ZOMBIE)
522 (void) printf(" %-*.*s %5d %4.1ld:%2.2ld %s\n",
523 LINE_WIDTH, (int)LMAX, " ?", (int)up->p_upid, 0L, 0L,
524 "<defunct>");
525 else if (up->p_state != NONE) {
526 (void) printf(" %-*.*s %5d %4.1ld:%2.2ld %s\n",
527 LINE_WIDTH, (int)LMAX, getty(up->p_ttyd), (int)up->p_upid,
528 up->p_time / 60L, up->p_time % 60L,
529 up->p_comm);
530 }
531 up->p_state = VISITED;
532
533 /* descend for its children */
534 if (up->p_child) {
535 showproc(up->p_child);
536 for (zp = up->p_child->p_sibling; zp; zp = zp->p_sibling) {
537 showproc(zp);
538 }
539 }
540
541 /* print the pgrp relation */
542 if (up->p_pgrplink)
543 showproc(up->p_pgrplink);
544 }
545
546
547 /*
548 * Used for -l flag (w command) format.
549 * Prints the CPU time for all processes & children,
550 * and the cpu time for interesting process,
551 * and what the user is doing.
552 */
553 static void
554 showtotals(struct uproc *up)
555 {
556 jobtime = 0;
557 proctime = 0;
558 empty = 1;
559 curpid = -1;
560 (void) strcpy(doing, "-"); /* default act: normally never prints */
561 calctotals(up);
562
563 /* print CPU time for all processes & children */
564 /* and need to convert clock ticks to seconds first */
565 prttime((time_t)jobtime, " ");
566
567 /* print cpu time for interesting process */
568 /* and need to convert clock ticks to seconds first */
569 prttime((time_t)proctime, " ");
570
571 /* what user is doing, current process */
572 (void) printf(" %-.32s\n", doing);
573 }
574
575 /*
576 * Used for -l flag (w command) format.
577 * This recursive routine descends the process
578 * tree starting from the given process pointer(up).
579 * It used depth-first search strategy and also marked
580 * each node as visited as it traversed down the tree.
581 * It calculates the process time for all processes &
582 * children. It also finds the "interesting" process
583 * and determines its cpu time and command.
584 */
585 static void
586 calctotals(struct uproc *up)
587 {
588 struct uproc *zp;
589
590 if (up->p_state == VISITED)
591 return;
592 up->p_state = VISITED;
593 if (up->p_state == NONE || up->p_state == ZOMBIE)
594 return;
595 jobtime += up->p_time + up->p_ctime;
596 proctime += up->p_time;
597
598 if (empty && !up->p_igintr) {
599 empty = 0;
600 curpid = -1;
601 }
602
603 if (up->p_upid > curpid && (!up->p_igintr || empty)) {
604 curpid = up->p_upid;
605 (void) strcpy(doing, up->p_args);
606 }
607
608 /* descend for its children */
609 if (up->p_child) {
610 calctotals(up->p_child);
611 for (zp = up->p_child->p_sibling; zp; zp = zp->p_sibling)
612 calctotals(zp);
613 }
614 }
615
616 static char *
617 devadd(char *name, dev_t ddev)
618 {
619 struct devl *dp;
620 int leng, start, i;
621
622 if (ndevs == maxdev) {
623 maxdev += DNINCR;
624 dp = realloc(devl, maxdev * sizeof (struct devl));
625 if (!dp) {
626 (void) fprintf(stderr,
627 gettext("%s: out of memory!: %s\n"),
628 prog, strerror(errno));
629 exit(1);
630 }
631 devl = dp;
632 }
633 dp = &devl[ndevs++];
634
635 dp->ddev = ddev;
636 if (name == NULL) {
637 (void) strcpy(dp->dname, " ? ");
638 return (dp->dname);
639 }
640
641 leng = strlen(name);
642 if (leng < DEVNAMELEN + 4) {
643 /* strip off "/dev/" */
644 (void) strcpy(dp->dname, &name[5]);
645 } else {
646 /* strip enough off the front to fit */
647 start = leng - DEVNAMELEN - 1;
648
649 for (i = start; i < leng && name[i] != '/'; i++)
650 ;
651 if (i == leng)
652 (void) strncpy(dp->dname, &name[start], DEVNAMELEN);
653 else
654 (void) strncpy(dp->dname, &name[i+1], DEVNAMELEN);
655 }
656 return (dp->dname);
657 }
658
659 static char *
660 devlookup(dev_t ddev)
661 {
662 struct devl *dp;
663 int i;
664
665 for (dp = devl, i = 0; i < ndevs; dp++, i++) {
666 if (dp->ddev == ddev)
667 return (dp->dname);
668 }
669 return (NULL);
670 }
671
672 /*
673 * This routine gives back a corresponding device name
674 * from the device number given.
675 */
676 static char *
677 getty(dev_t dev)
678 {
679 extern char *_ttyname_dev(dev_t, char *, size_t);
680 char devname[TTYNAME_MAX];
681 char *retval;
682
683 if (dev == PRNODEV)
684 return (" ? ");
685
686 if ((retval = devlookup(dev)) != NULL)
687 return (retval);
688
689 retval = _ttyname_dev(dev, devname, sizeof (devname));
690 return (devadd(retval, dev));
691 }
692
693 /*
694 * Findhash finds the appropriate entry in the process
695 * hash table (pr_htbl) for the given pid in case that
696 * pid exists on the hash chain. It returns back a pointer
697 * to that uproc structure. If this is a new pid, it allocates
698 * a new node, initializes it, links it into the chain (after
699 * head) and returns a structure pointer.
700 */
701 static struct uproc *
702 findhash(pid_t pid)
703 {
704 struct uproc *up, *tp;
705
706 tp = up = &pr_htbl[(int)pid % HSIZE];
707 if (up->p_upid == 0) { /* empty slot */
708 up->p_upid = pid;
709 up->p_state = NONE;
710 up->p_child = up->p_sibling = up->p_pgrplink = up->p_link = 0;
711 return (up);
712 }
713 if (up->p_upid == pid) { /* found in hash table */
714 return (up);
715 }
716 for (tp = up->p_link; tp; tp = tp->p_link) { /* follow chain */
717 if (tp->p_upid == pid) {
718 return (tp);
719 }
720 }
721 tp = malloc(sizeof (*tp)); /* add new node */
722 if (!tp) {
723 (void) fprintf(stderr, gettext("%s: out of memory!: %s\n"),
724 prog, strerror(errno));
725 exit(1);
726 }
727 (void) memset((char *)tp, 0, sizeof (*tp));
728 tp->p_upid = pid;
729 tp->p_state = NONE;
730 tp->p_child = tp->p_sibling = tp->p_pgrplink = (pid_t)0;
731 tp->p_link = up->p_link; /* insert after head */
732 up->p_link = tp;
733 return (tp);
734 }
735
736 #define HR (60 * 60)
737 #define DAY (24 * HR)
738 #define MON (30 * DAY)
739
740 /*
741 * prints a time in hours and minutes or minutes and seconds.
742 * The character string 'tail' is printed at the end, obvious
743 * strings to pass are "", " ", or "am".
744 */
745 static void
746 prttime(time_t tim, char *tail)
747 {
748 if (tim >= 60)
749 (void) printf(dcgettext(NULL, "%3d:%02d", LC_TIME),
750 (int)tim/60, (int)tim%60);
751 else if (tim > 0)
752 (void) printf(dcgettext(NULL, " %2d", LC_TIME), (int)tim);
753 else
754 (void) printf(" ");
755 (void) printf("%s", tail);
756 }
757
758
759 /*
760 * prints a 12 hour time given a pointer to a time of day
761 */
762 static void
763 prtat(time_t *time)
764 {
765 struct tm *p;
766
767 p = localtime(time);
768 if (now - *time <= 18 * HR) {
769 char timestr[50];
770 (void) strftime(timestr, sizeof (timestr),
771 dcgettext(NULL, " %l:%M""%p", LC_TIME), p);
772 checkampm(timestr);
773 (void) printf("%s", timestr);
774 } else if (now - *time <= 7 * DAY) {
775 char weekdaytime[20];
776
777 (void) strftime(weekdaytime, sizeof (weekdaytime),
778 dcgettext(NULL, "%a%l%p", LC_TIME), p);
779 checkampm(weekdaytime);
780 (void) printf(" %s", weekdaytime);
781 } else {
782 char monthtime[20];
783
784 (void) strftime(monthtime, sizeof (monthtime),
785 dcgettext(NULL, "%e%b%y", LC_TIME), p);
786 (void) printf(" %s", monthtime);
787 }
788 }
789
790 /*
791 * find & return number of minutes current tty has been idle
792 */
793 static time_t
794 findidle(char *devname)
795 {
796 struct stat stbuf;
797 time_t lastaction, diff;
798 char ttyname[64];
799
800 (void) strcpy(ttyname, "/dev/");
801 (void) strcat(ttyname, devname);
802 if (stat(ttyname, &stbuf) != -1) {
803 lastaction = stbuf.st_atime;
804 diff = now - lastaction;
805 diff = DIV60(diff);
806 if (diff < 0)
807 diff = 0;
808 } else
809 diff = 0;
810 return (diff);
811 }
812
813 /*
814 * given a pointer to the argument string clean out unsavory characters.
815 */
816 static void
817 clnarglist(char *arglist)
818 {
819 char *c;
820 int err = 0;
821
822 /* get rid of unsavory characters */
823 for (c = arglist; *c == NULL; c++) {
824 if ((*c < ' ') || (*c > 0176)) {
825 if (err++ > 5) {
826 *arglist = NULL;
827 break;
828 }
829 *c = '?';
830 }
831 }
832 }
833
834 /* replaces all occurences of AM/PM with am/pm */
835 static void
836 checkampm(char *str)
837 {
838 char *ampm;
839 while ((ampm = strstr(str, "AM")) != NULL ||
840 (ampm = strstr(str, "PM")) != NULL) {
841 *ampm = tolower(*ampm);
842 *(ampm+1) = tolower(*(ampm+1));
843 }
844 }