Commit | Line | Data |
---|---|---|
68d13ee3 | 1 | #ifndef lint |
a591da4b | 2 | static char *sccsid = "@(#)w.c 4.12 (Berkeley) %G%"; |
68d13ee3 | 3 | #endif |
76238d88 BJ |
4 | /* |
5 | * w - print system status (who and what) | |
6 | * | |
7 | * This program is similar to the systat command on Tenex/Tops 10/20 | |
8 | * It needs read permission on /dev/mem, /dev/kmem, and /dev/drum. | |
9 | */ | |
10 | #include <sys/param.h> | |
11 | #include <nlist.h> | |
12 | #include <stdio.h> | |
13 | #include <ctype.h> | |
14 | #include <utmp.h> | |
76238d88 BJ |
15 | #include <sys/stat.h> |
16 | #include <sys/dir.h> | |
17 | #include <sys/user.h> | |
18 | #include <sys/proc.h> | |
57ee57ff | 19 | #include <machine/pte.h> |
76238d88 BJ |
20 | #include <sys/vm.h> |
21 | ||
22 | #define NMAX sizeof(utmp.ut_name) | |
23 | #define LMAX sizeof(utmp.ut_line) | |
24 | ||
25 | #define ARGWIDTH 33 /* # chars left on 80 col crt for args */ | |
26 | ||
bdb1f95f | 27 | struct pr { |
76238d88 BJ |
28 | short w_pid; /* proc.p_pid */ |
29 | char w_flag; /* proc.p_flag */ | |
30 | short w_size; /* proc.p_size */ | |
31 | long w_seekaddr; /* where to find args */ | |
32 | long w_lastpg; /* disk address of stack */ | |
33 | int w_igintr; /* INTR+3*QUIT, 0=die, 1=ign, 2=catch */ | |
34 | time_t w_time; /* CPU time used by this process */ | |
35 | time_t w_ctime; /* CPU time used by children */ | |
36 | dev_t w_tty; /* tty device of process */ | |
37 | char w_comm[15]; /* user.u_comm, null terminated */ | |
38 | char w_args[ARGWIDTH+1]; /* args if interesting process */ | |
bdb1f95f BJ |
39 | } *pr; |
40 | int nproc; | |
76238d88 BJ |
41 | |
42 | struct nlist nl[] = { | |
43 | { "_proc" }, | |
44 | #define X_PROC 0 | |
45 | { "_swapdev" }, | |
46 | #define X_SWAPDEV 1 | |
47 | { "_Usrptmap" }, | |
48 | #define X_USRPTMA 2 | |
49 | { "_usrpt" }, | |
50 | #define X_USRPT 3 | |
51 | { "_nswap" }, | |
52 | #define X_NSWAP 4 | |
53 | { "_avenrun" }, | |
54 | #define X_AVENRUN 5 | |
a43be079 SL |
55 | { "_boottime" }, |
56 | #define X_BOOTTIME 6 | |
bdb1f95f BJ |
57 | { "_nproc" }, |
58 | #define X_NPROC 7 | |
68d13ee3 SL |
59 | { "_dmmin" }, |
60 | #define X_DMMIN 8 | |
61 | { "_dmmax" }, | |
62 | #define X_DMMAX 9 | |
20932249 | 63 | { "" }, |
76238d88 BJ |
64 | }; |
65 | ||
66 | FILE *ps; | |
67 | FILE *ut; | |
68 | FILE *bootfd; | |
69 | int kmem; | |
70 | int mem; | |
71 | int swap; /* /dev/kmem, mem, and swap */ | |
72 | int nswap; | |
68d13ee3 | 73 | int dmmin, dmmax; |
76238d88 BJ |
74 | dev_t tty; |
75 | char doing[520]; /* process attached to terminal */ | |
76 | time_t proctime; /* cpu time of process in doing */ | |
77 | double avenrun[3]; | |
bdb1f95f | 78 | struct proc *aproc; |
76238d88 | 79 | |
68d13ee3 | 80 | #define DIV60(t) ((t+30)/60) /* x/60 rounded */ |
76238d88 BJ |
81 | #define TTYEQ (tty == pr[i].w_tty) |
82 | #define IGINT (1+3*1) /* ignoring both SIGINT & SIGQUIT */ | |
83 | ||
84 | char *getargs(); | |
85 | char *fread(); | |
86 | char *ctime(); | |
87 | char *rindex(); | |
88 | FILE *popen(); | |
89 | struct tm *localtime(); | |
90 | ||
91 | int debug; /* true if -d flag: debugging output */ | |
92 | int header = 1; /* true if -h flag: don't print heading */ | |
93 | int lflag = 1; /* true if -l flag: long style output */ | |
94 | int login; /* true if invoked as login shell */ | |
95 | int idle; /* number of minutes user is idle */ | |
96 | int nusers; /* number of users logged in now */ | |
97 | char * sel_user; /* login of particular user selected */ | |
98 | char firstchar; /* first char of name of prog invoked as */ | |
99 | time_t jobtime; /* total cpu time visible */ | |
100 | time_t now; /* the current time of day */ | |
101 | struct tm *nowt; /* current time as time struct */ | |
a43be079 SL |
102 | struct timeval boottime; |
103 | time_t uptime; /* time of last reboot & elapsed time since */ | |
76238d88 BJ |
104 | int np; /* number of processes currently active */ |
105 | struct utmp utmp; | |
106 | struct proc mproc; | |
20932249 SL |
107 | union { |
108 | struct user U_up; | |
109 | char pad[NBPG][UPAGES]; | |
110 | } Up; | |
111 | #define up Up.U_up | |
76238d88 BJ |
112 | |
113 | main(argc, argv) | |
114 | char **argv; | |
115 | { | |
116 | int days, hrs, mins; | |
117 | register int i, j; | |
118 | char *cp; | |
119 | register int curpid, empty; | |
120 | char obuf[BUFSIZ]; | |
121 | ||
122 | setbuf(stdout, obuf); | |
123 | login = (argv[0][0] == '-'); | |
124 | cp = rindex(argv[0], '/'); | |
125 | firstchar = login ? argv[0][1] : (cp==0) ? argv[0][0] : cp[1]; | |
126 | cp = argv[0]; /* for Usage */ | |
127 | ||
128 | while (argc > 1) { | |
129 | if (argv[1][0] == '-') { | |
130 | for (i=1; argv[1][i]; i++) { | |
131 | switch(argv[1][i]) { | |
132 | ||
133 | case 'd': | |
134 | debug++; | |
135 | break; | |
136 | ||
137 | case 'h': | |
138 | header = 0; | |
139 | break; | |
140 | ||
141 | case 'l': | |
142 | lflag++; | |
143 | break; | |
144 | ||
145 | case 's': | |
146 | lflag = 0; | |
147 | break; | |
148 | ||
149 | case 'u': | |
150 | case 'w': | |
635aa49f | 151 | firstchar = argv[1][i]; |
76238d88 BJ |
152 | break; |
153 | ||
154 | default: | |
155 | printf("Bad flag %s\n", argv[1]); | |
156 | exit(1); | |
157 | } | |
158 | } | |
159 | } else { | |
160 | if (!isalnum(argv[1][0]) || argc > 2) { | |
161 | printf("Usage: %s [ -hlsuw ] [ user ]\n", cp); | |
162 | exit(1); | |
163 | } else | |
164 | sel_user = argv[1]; | |
165 | } | |
166 | argc--; argv++; | |
167 | } | |
168 | ||
169 | if ((kmem = open("/dev/kmem", 0)) < 0) { | |
170 | fprintf(stderr, "No kmem\n"); | |
171 | exit(1); | |
172 | } | |
173 | nlist("/vmunix", nl); | |
174 | if (nl[0].n_type==0) { | |
175 | fprintf(stderr, "No namelist\n"); | |
176 | exit(1); | |
177 | } | |
178 | ||
179 | if (firstchar != 'u') | |
180 | readpr(); | |
181 | ||
182 | ut = fopen("/etc/utmp","r"); | |
183 | if (header) { | |
184 | /* Print time of day */ | |
185 | time(&now); | |
186 | nowt = localtime(&now); | |
187 | prtat(nowt); | |
188 | ||
189 | /* | |
190 | * Print how long system has been up. | |
a43be079 | 191 | * (Found by looking for "boottime" in kernel) |
76238d88 | 192 | */ |
a43be079 SL |
193 | lseek(kmem, (long)nl[X_BOOTTIME].n_value, 0); |
194 | read(kmem, &boottime, sizeof (boottime)); | |
76238d88 | 195 | |
a43be079 | 196 | uptime = now - boottime.tv_sec; |
baaa0078 | 197 | uptime += 30; |
76238d88 BJ |
198 | days = uptime / (60*60*24); |
199 | uptime %= (60*60*24); | |
200 | hrs = uptime / (60*60); | |
201 | uptime %= (60*60); | |
baaa0078 | 202 | mins = uptime / 60; |
76238d88 BJ |
203 | |
204 | printf(" up"); | |
205 | if (days > 0) | |
206 | printf(" %d day%s,", days, days>1?"s":""); | |
207 | if (hrs > 0 && mins > 0) { | |
208 | printf(" %2d:%02d,", hrs, mins); | |
209 | } else { | |
210 | if (hrs > 0) | |
211 | printf(" %d hr%s,", hrs, hrs>1?"s":""); | |
212 | if (mins > 0) | |
213 | printf(" %d min%s,", mins, mins>1?"s":""); | |
214 | } | |
215 | ||
216 | /* Print number of users logged in to system */ | |
217 | while (fread(&utmp, sizeof(utmp), 1, ut)) { | |
218 | if (utmp.ut_name[0] != '\0') | |
219 | nusers++; | |
220 | } | |
221 | rewind(ut); | |
222 | printf(" %d users", nusers); | |
223 | ||
224 | /* | |
225 | * Print 1, 5, and 15 minute load averages. | |
226 | * (Found by looking in kernel for avenrun). | |
227 | */ | |
228 | printf(", load average:"); | |
229 | lseek(kmem, (long)nl[X_AVENRUN].n_value, 0); | |
230 | read(kmem, avenrun, sizeof(avenrun)); | |
231 | for (i = 0; i < (sizeof(avenrun)/sizeof(avenrun[0])); i++) { | |
232 | if (i > 0) | |
233 | printf(","); | |
234 | printf(" %.2f", avenrun[i]); | |
235 | } | |
236 | printf("\n"); | |
237 | if (firstchar == 'u') | |
238 | exit(0); | |
239 | ||
240 | /* Headers for rest of output */ | |
241 | if (lflag) | |
242 | printf("User tty login@ idle JCPU PCPU what\n"); | |
243 | else | |
244 | printf("User tty idle what\n"); | |
245 | fflush(stdout); | |
246 | } | |
247 | ||
248 | ||
249 | for (;;) { /* for each entry in utmp */ | |
250 | if (fread(&utmp, sizeof(utmp), 1, ut) == NULL) { | |
251 | fclose(ut); | |
252 | exit(0); | |
253 | } | |
254 | if (utmp.ut_name[0] == '\0') | |
255 | continue; /* that tty is free */ | |
256 | if (sel_user && strcmpn(utmp.ut_name, sel_user, NMAX) != 0) | |
257 | continue; /* we wanted only somebody else */ | |
258 | ||
259 | gettty(); | |
260 | jobtime = 0; | |
261 | proctime = 0; | |
262 | strcpy(doing, "-"); /* default act: normally never prints */ | |
263 | empty = 1; | |
264 | curpid = -1; | |
265 | idle = findidle(); | |
266 | for (i=0; i<np; i++) { /* for each process on this tty */ | |
267 | if (!(TTYEQ)) | |
268 | continue; | |
269 | jobtime += pr[i].w_time + pr[i].w_ctime; | |
270 | proctime += pr[i].w_time; | |
271 | if (debug) { | |
272 | printf("\t\t%d\t%s", pr[i].w_pid, pr[i].w_args); | |
273 | if ((j=pr[i].w_igintr) > 0) | |
274 | if (j==IGINT) | |
275 | printf(" &"); | |
276 | else | |
277 | printf(" & %d %d", j%3, j/3); | |
278 | printf("\n"); | |
279 | } | |
280 | if (empty && pr[i].w_igintr!=IGINT) { | |
281 | empty = 0; | |
282 | curpid = -1; | |
283 | } | |
284 | if(pr[i].w_pid>curpid && (pr[i].w_igintr!=IGINT || empty)){ | |
285 | curpid = pr[i].w_pid; | |
286 | strcpy(doing, lflag ? pr[i].w_args : pr[i].w_comm); | |
287 | #ifdef notdef | |
288 | if (doing[0]==0 || doing[0]=='-' && doing[1]<=' ' || doing[0] == '?') { | |
289 | strcat(doing, " ("); | |
290 | strcat(doing, pr[i].w_comm); | |
291 | strcat(doing, ")"); | |
292 | } | |
293 | #endif | |
294 | } | |
295 | } | |
296 | putline(); | |
297 | } | |
298 | } | |
299 | ||
300 | /* figure out the major/minor device # pair for this tty */ | |
301 | gettty() | |
302 | { | |
303 | char ttybuf[20]; | |
304 | struct stat statbuf; | |
305 | ||
306 | ttybuf[0] = 0; | |
307 | strcpy(ttybuf, "/dev/"); | |
308 | strcat(ttybuf, utmp.ut_line); | |
309 | stat(ttybuf, &statbuf); | |
310 | tty = statbuf.st_rdev; | |
311 | } | |
312 | ||
313 | /* | |
314 | * putline: print out the accumulated line of info about one user. | |
315 | */ | |
316 | putline() | |
317 | { | |
318 | register int tm; | |
319 | ||
320 | /* print login name of the user */ | |
321 | printf("%-*.*s ", NMAX, NMAX, utmp.ut_name); | |
322 | ||
323 | /* print tty user is on */ | |
324 | if (lflag) | |
325 | /* long form: all (up to) LMAX chars */ | |
326 | printf("%-*.*s", LMAX, LMAX, utmp.ut_line); | |
327 | else { | |
328 | /* short form: 2 chars, skipping 'tty' if there */ | |
329 | if (utmp.ut_line[0]=='t' && utmp.ut_line[1]=='t' && utmp.ut_line[2]=='y') | |
330 | printf("%-2.2s", &utmp.ut_line[3]); | |
331 | else | |
332 | printf("%-2.2s", utmp.ut_line); | |
333 | } | |
334 | ||
335 | if (lflag) | |
336 | /* print when the user logged in */ | |
337 | prtat(localtime(&utmp.ut_time)); | |
338 | ||
339 | /* print idle time */ | |
340 | prttime(idle," "); | |
341 | ||
342 | if (lflag) { | |
343 | /* print CPU time for all processes & children */ | |
a591da4b | 344 | prttime(jobtime," "); |
76238d88 | 345 | /* print cpu time for interesting process */ |
a591da4b | 346 | prttime(proctime," "); |
76238d88 BJ |
347 | } |
348 | ||
349 | /* what user is doing, either command tail or args */ | |
350 | printf(" %-.32s\n",doing); | |
351 | fflush(stdout); | |
352 | } | |
353 | ||
354 | /* find & return number of minutes current tty has been idle */ | |
355 | findidle() | |
356 | { | |
357 | struct stat stbuf; | |
358 | long lastaction, diff; | |
359 | char ttyname[20]; | |
360 | ||
361 | strcpy(ttyname, "/dev/"); | |
362 | strcatn(ttyname, utmp.ut_line, LMAX); | |
363 | stat(ttyname, &stbuf); | |
364 | time(&now); | |
365 | lastaction = stbuf.st_atime; | |
366 | diff = now - lastaction; | |
367 | diff = DIV60(diff); | |
368 | if (diff < 0) diff = 0; | |
369 | return(diff); | |
370 | } | |
371 | ||
372 | /* | |
373 | * prttime prints a time in hours and minutes. | |
374 | * The character string tail is printed at the end, obvious | |
375 | * strings to pass are "", " ", or "am". | |
376 | */ | |
377 | prttime(tim, tail) | |
378 | time_t tim; | |
379 | char *tail; | |
380 | { | |
381 | register int didhrs = 0; | |
382 | ||
383 | if (tim >= 60) { | |
384 | printf("%3d:", tim/60); | |
385 | didhrs++; | |
386 | } else { | |
387 | printf(" "); | |
388 | } | |
389 | tim %= 60; | |
390 | if (tim > 0 || didhrs) { | |
391 | printf(didhrs&&tim<10 ? "%02d" : "%2d", tim); | |
392 | } else { | |
393 | printf(" "); | |
394 | } | |
395 | printf("%s", tail); | |
396 | } | |
397 | ||
398 | /* prtat prints a 12 hour time given a pointer to a time of day */ | |
399 | prtat(p) | |
400 | struct tm *p; | |
401 | { | |
402 | register int t, pm; | |
403 | ||
404 | t = p -> tm_hour; | |
405 | pm = (t > 11); | |
406 | if (t > 11) | |
407 | t -= 12; | |
408 | if (t == 0) | |
409 | t = 12; | |
410 | prttime(t*60 + p->tm_min, pm ? "pm" : "am"); | |
411 | } | |
412 | ||
413 | /* | |
414 | * readpr finds and reads in the array pr, containing the interesting | |
415 | * parts of the proc and user tables for each live process. | |
416 | */ | |
417 | readpr() | |
418 | { | |
419 | int pn, mf, addr, c; | |
420 | int szpt, pfnum, i; | |
421 | struct pte *Usrptma, *usrpt, *pte, apte; | |
422 | struct dblock db; | |
423 | ||
424 | Usrptma = (struct pte *) nl[X_USRPTMA].n_value; | |
425 | usrpt = (struct pte *) nl[X_USRPT].n_value; | |
426 | if((mem = open("/dev/mem", 0)) < 0) { | |
427 | fprintf(stderr, "No mem\n"); | |
428 | exit(1); | |
429 | } | |
430 | if ((swap = open("/dev/drum", 0)) < 0) { | |
431 | fprintf(stderr, "No drum\n"); | |
432 | exit(1); | |
433 | } | |
434 | /* | |
435 | * read mem to find swap dev. | |
436 | */ | |
437 | lseek(kmem, (long)nl[X_SWAPDEV].n_value, 0); | |
438 | read(kmem, &nl[X_SWAPDEV].n_value, sizeof(nl[X_SWAPDEV].n_value)); | |
439 | /* | |
68d13ee3 | 440 | * Find base of and parameters of swap |
76238d88 BJ |
441 | */ |
442 | lseek(kmem, (long)nl[X_NSWAP].n_value, 0); | |
443 | read(kmem, &nswap, sizeof(nswap)); | |
68d13ee3 SL |
444 | lseek(kmem, (long)nl[X_DMMIN].n_value, 0); |
445 | read(kmem, &dmmin, sizeof(dmmin)); | |
446 | lseek(kmem, (long)nl[X_DMMAX].n_value, 0); | |
447 | read(kmem, &dmmax, sizeof(dmmax)); | |
76238d88 BJ |
448 | /* |
449 | * Locate proc table | |
450 | */ | |
bdb1f95f BJ |
451 | lseek(kmem, (long)nl[X_NPROC].n_value, 0); |
452 | read(kmem, &nproc, sizeof(nproc)); | |
453 | pr = (struct pr *)calloc(nproc, sizeof (struct pr)); | |
76238d88 | 454 | np = 0; |
bdb1f95f BJ |
455 | lseek(kmem, (long)nl[X_PROC].n_value, 0); |
456 | read(kmem, &aproc, sizeof(aproc)); | |
457 | for (pn=0; pn<nproc; pn++) { | |
458 | lseek(kmem, (int)(aproc + pn), 0); | |
76238d88 BJ |
459 | read(kmem, &mproc, sizeof mproc); |
460 | /* decide if it's an interesting process */ | |
461 | if (mproc.p_stat==0 || mproc.p_pgrp==0) | |
462 | continue; | |
76238d88 BJ |
463 | /* find & read in the user structure */ |
464 | if ((mproc.p_flag & SLOAD) == 0) { | |
465 | /* not in memory - get from swap device */ | |
20932249 | 466 | addr = dtob(mproc.p_swaddr); |
76238d88 BJ |
467 | lseek(swap, (long)addr, 0); |
468 | if (read(swap, &up, sizeof(up)) != sizeof(up)) { | |
469 | continue; | |
470 | } | |
471 | } else { | |
472 | int p0br, cc; | |
473 | #define INTPPG (NBPG / sizeof (int)) | |
474 | struct pte pagetbl[NBPG / sizeof (struct pte)]; | |
475 | /* loaded, get each page from memory separately */ | |
476 | szpt = mproc.p_szpt; | |
477 | p0br = (int)mproc.p_p0br; | |
478 | pte = &Usrptma[btokmx(mproc.p_p0br) + szpt-1]; | |
479 | lseek(kmem, (long)pte, 0); | |
480 | if (read(kmem, &apte, sizeof(apte)) != sizeof(apte)) | |
481 | continue; | |
482 | lseek(mem, ctob(apte.pg_pfnum), 0); | |
483 | if (read(mem,pagetbl,sizeof(pagetbl)) != sizeof(pagetbl)) | |
484 | cont: | |
485 | continue; | |
486 | for(cc=0; cc<UPAGES; cc++) { /* get u area */ | |
487 | int upage = pagetbl[NPTEPG-UPAGES+cc].pg_pfnum; | |
488 | lseek(mem,ctob(upage),0); | |
489 | if (read(mem,((int *)&up)+INTPPG*cc,NBPG) != NBPG) | |
490 | goto cont; | |
491 | } | |
492 | szpt = up.u_pcb.pcb_szpt; | |
493 | pr[np].w_seekaddr = ctob(apte.pg_pfnum); | |
494 | } | |
e941b445 | 495 | vstodb(0, CLSIZE, &up.u_smap, &db, 1); |
20932249 | 496 | pr[np].w_lastpg = dtob(db.db_base); |
76238d88 BJ |
497 | if (up.u_ttyp == NULL) |
498 | continue; | |
499 | ||
500 | /* save the interesting parts */ | |
501 | pr[np].w_pid = mproc.p_pid; | |
502 | pr[np].w_flag = mproc.p_flag; | |
503 | pr[np].w_size = mproc.p_dsize + mproc.p_ssize; | |
20932249 SL |
504 | pr[np].w_igintr = (((int)up.u_signal[2]==1) + |
505 | 2*((int)up.u_signal[2]>1) + 3*((int)up.u_signal[3]==1)) + | |
506 | 6*((int)up.u_signal[3]>1); | |
a43be079 SL |
507 | pr[np].w_time = |
508 | up.u_ru.ru_utime.tv_sec + up.u_ru.ru_stime.tv_sec; | |
509 | pr[np].w_ctime = | |
510 | up.u_cru.ru_utime.tv_sec + up.u_cru.ru_stime.tv_sec; | |
76238d88 BJ |
511 | pr[np].w_tty = up.u_ttyd; |
512 | up.u_comm[14] = 0; /* Bug: This bombs next field. */ | |
513 | strcpy(pr[np].w_comm, up.u_comm); | |
514 | /* | |
515 | * Get args if there's a chance we'll print it. | |
516 | * Cant just save pointer: getargs returns static place. | |
517 | * Cant use strcpyn: that crock blank pads. | |
518 | */ | |
519 | pr[np].w_args[0] = 0; | |
520 | strcatn(pr[np].w_args,getargs(&pr[np]),ARGWIDTH); | |
521 | if (pr[np].w_args[0]==0 || pr[np].w_args[0]=='-' && pr[np].w_args[1]<=' ' || pr[np].w_args[0] == '?') { | |
522 | strcat(pr[np].w_args, " ("); | |
523 | strcat(pr[np].w_args, pr[np].w_comm); | |
524 | strcat(pr[np].w_args, ")"); | |
525 | } | |
526 | np++; | |
527 | } | |
528 | } | |
529 | ||
530 | /* | |
531 | * getargs: given a pointer to a proc structure, this looks at the swap area | |
532 | * and tries to reconstruct the arguments. This is straight out of ps. | |
533 | */ | |
534 | char * | |
535 | getargs(p) | |
bdb1f95f | 536 | struct pr *p; |
76238d88 BJ |
537 | { |
538 | int c, addr, nbad; | |
e941b445 | 539 | static int abuf[CLSIZE*NBPG/sizeof(int)]; |
76238d88 BJ |
540 | struct pte pagetbl[NPTEPG]; |
541 | register int *ip; | |
542 | register char *cp, *cp1; | |
543 | ||
544 | if ((p->w_flag & SLOAD) == 0) { | |
545 | lseek(swap, p->w_lastpg, 0); | |
546 | if (read(swap, abuf, sizeof(abuf)) != sizeof(abuf)) | |
547 | return(p->w_comm); | |
548 | } else { | |
549 | c = p->w_seekaddr; | |
550 | lseek(mem,c,0); | |
551 | if (read(mem,pagetbl,NBPG) != NBPG) | |
552 | return(p->w_comm); | |
e941b445 BJ |
553 | if (pagetbl[NPTEPG-CLSIZE-UPAGES].pg_fod==0 && pagetbl[NPTEPG-CLSIZE-UPAGES].pg_pfnum) { |
554 | lseek(mem,ctob(pagetbl[NPTEPG-CLSIZE-UPAGES].pg_pfnum),0); | |
76238d88 BJ |
555 | if (read(mem,abuf,sizeof(abuf)) != sizeof(abuf)) |
556 | return(p->w_comm); | |
557 | } else { | |
558 | lseek(swap, p->w_lastpg, 0); | |
559 | if (read(swap, abuf, sizeof(abuf)) != sizeof(abuf)) | |
560 | return(p->w_comm); | |
561 | } | |
562 | } | |
e941b445 BJ |
563 | abuf[sizeof(abuf)/sizeof(abuf[0])-1] = 0; |
564 | for (ip = &abuf[sizeof(abuf)/sizeof(abuf[0])-2]; ip > abuf;) { | |
76238d88 BJ |
565 | /* Look from top for -1 or 0 as terminator flag. */ |
566 | if (*--ip == -1 || *ip == 0) { | |
567 | cp = (char *)(ip+1); | |
568 | if (*cp==0) | |
569 | cp++; | |
570 | nbad = 0; /* up to 5 funny chars as ?'s */ | |
e941b445 | 571 | for (cp1 = cp; cp1 < (char *)&abuf[sizeof(abuf)/sizeof(abuf[0])]; cp1++) { |
76238d88 BJ |
572 | c = *cp1&0177; |
573 | if (c==0) /* nulls between args => spaces */ | |
574 | *cp1 = ' '; | |
575 | else if (c < ' ' || c > 0176) { | |
576 | if (++nbad >= 5) { | |
577 | *cp1++ = ' '; | |
578 | break; | |
579 | } | |
580 | *cp1 = '?'; | |
581 | } else if (c=='=') { /* Oops - found an | |
582 | * environment var, back | |
583 | * over & erase it. */ | |
584 | *cp1 = 0; | |
585 | while (cp1>cp && *--cp1!=' ') | |
586 | *cp1 = 0; | |
587 | break; | |
588 | } | |
589 | } | |
590 | while (*--cp1==' ') /* strip trailing spaces */ | |
591 | *cp1 = 0; | |
592 | return(cp); | |
593 | } | |
594 | } | |
595 | return (p->w_comm); | |
596 | } | |
597 | ||
598 | /* | |
599 | * Given a base/size pair in virtual swap area, | |
600 | * return a physical base/size pair which is the | |
601 | * (largest) initial, physically contiguous block. | |
602 | */ | |
603 | vstodb(vsbase, vssize, dmp, dbp, rev) | |
604 | register int vsbase; | |
605 | int vssize; | |
606 | struct dmap *dmp; | |
607 | register struct dblock *dbp; | |
608 | { | |
68d13ee3 | 609 | register int blk = dmmin; |
76238d88 BJ |
610 | register swblk_t *ip = dmp->dm_map; |
611 | ||
20932249 SL |
612 | vsbase = ctod(vsbase); |
613 | vssize = ctod(vssize); | |
76238d88 BJ |
614 | if (vsbase < 0 || vsbase + vssize > dmp->dm_size) |
615 | panic("vstodb"); | |
616 | while (vsbase >= blk) { | |
617 | vsbase -= blk; | |
68d13ee3 | 618 | if (blk < dmmax) |
76238d88 BJ |
619 | blk *= 2; |
620 | ip++; | |
621 | } | |
622 | if (*ip <= 0 || *ip + blk > nswap) | |
623 | panic("vstodb *ip"); | |
624 | dbp->db_size = min(vssize, blk - vsbase); | |
625 | dbp->db_base = *ip + (rev ? blk - (vsbase + dbp->db_size) : vsbase); | |
626 | } | |
627 | ||
628 | panic(cp) | |
629 | char *cp; | |
630 | { | |
631 | ||
632 | /* printf("%s\n", cp); */ | |
633 | } | |
634 | ||
635 | min(a, b) | |
636 | { | |
637 | ||
638 | return (a < b ? a : b); | |
639 | } |