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1.1 ! root 1: /* ! 2: * Copyright (c) 1980 Regents of the University of California. ! 3: * All rights reserved. The Berkeley software License Agreement ! 4: * specifies the terms and conditions for redistribution. ! 5: */ ! 6: ! 7: #ifndef lint ! 8: char copyright[] = ! 9: "@(#) Copyright (c) 1980 Regents of the University of California.\n\ ! 10: All rights reserved.\n"; ! 11: #endif not lint ! 12: ! 13: #ifndef lint ! 14: static char sccsid[] = "@(#)w.c 5.3 (Berkeley) 2/23/86"; ! 15: #endif not lint ! 16: ! 17: /* ! 18: * w - print system status (who and what) ! 19: * ! 20: * This program is similar to the systat command on Tenex/Tops 10/20 ! 21: * It needs read permission on /dev/mem, /dev/kmem, and /dev/drum. ! 22: */ ! 23: #include <sys/param.h> ! 24: #include <nlist.h> ! 25: #include <stdio.h> ! 26: #include <ctype.h> ! 27: #include <utmp.h> ! 28: #include <sys/stat.h> ! 29: #include <sys/dir.h> ! 30: #include <sys/user.h> ! 31: #include <sys/proc.h> ! 32: #include <machine/pte.h> ! 33: #include <sys/vm.h> ! 34: ! 35: #define NMAX sizeof(utmp.ut_name) ! 36: #define LMAX sizeof(utmp.ut_line) ! 37: ! 38: #define ARGWIDTH 33 /* # chars left on 80 col crt for args */ ! 39: ! 40: struct pr { ! 41: short w_pid; /* proc.p_pid */ ! 42: char w_flag; /* proc.p_flag */ ! 43: short w_size; /* proc.p_size */ ! 44: long w_seekaddr; /* where to find args */ ! 45: long w_lastpg; /* disk address of stack */ ! 46: int w_igintr; /* INTR+3*QUIT, 0=die, 1=ign, 2=catch */ ! 47: time_t w_time; /* CPU time used by this process */ ! 48: time_t w_ctime; /* CPU time used by children */ ! 49: dev_t w_tty; /* tty device of process */ ! 50: int w_uid; /* uid of process */ ! 51: char w_comm[15]; /* user.u_comm, null terminated */ ! 52: char w_args[ARGWIDTH+1]; /* args if interesting process */ ! 53: } *pr; ! 54: int nproc; ! 55: ! 56: struct nlist nl[] = { ! 57: { "_proc" }, ! 58: #define X_PROC 0 ! 59: { "_swapdev" }, ! 60: #define X_SWAPDEV 1 ! 61: { "_Usrptmap" }, ! 62: #define X_USRPTMA 2 ! 63: { "_usrpt" }, ! 64: #define X_USRPT 3 ! 65: { "_nswap" }, ! 66: #define X_NSWAP 4 ! 67: { "_avenrun" }, ! 68: #define X_AVENRUN 5 ! 69: { "_boottime" }, ! 70: #define X_BOOTTIME 6 ! 71: { "_nproc" }, ! 72: #define X_NPROC 7 ! 73: { "_dmmin" }, ! 74: #define X_DMMIN 8 ! 75: { "_dmmax" }, ! 76: #define X_DMMAX 9 ! 77: { "" }, ! 78: }; ! 79: ! 80: FILE *ps; ! 81: FILE *ut; ! 82: FILE *bootfd; ! 83: int kmem; ! 84: int mem; ! 85: int swap; /* /dev/kmem, mem, and swap */ ! 86: int nswap; ! 87: int dmmin, dmmax; ! 88: dev_t tty; ! 89: int uid; ! 90: char doing[520]; /* process attached to terminal */ ! 91: time_t proctime; /* cpu time of process in doing */ ! 92: double avenrun[3]; ! 93: struct proc *aproc; ! 94: ! 95: #define DIV60(t) ((t+30)/60) /* x/60 rounded */ ! 96: #define TTYEQ (tty == pr[i].w_tty && uid == pr[i].w_uid) ! 97: #define IGINT (1+3*1) /* ignoring both SIGINT & SIGQUIT */ ! 98: ! 99: char *getargs(); ! 100: char *fread(); ! 101: char *ctime(); ! 102: char *rindex(); ! 103: FILE *popen(); ! 104: struct tm *localtime(); ! 105: time_t findidle(); ! 106: ! 107: int debug; /* true if -d flag: debugging output */ ! 108: int header = 1; /* true if -h flag: don't print heading */ ! 109: int lflag = 1; /* true if -l flag: long style output */ ! 110: int login; /* true if invoked as login shell */ ! 111: time_t idle; /* number of minutes user is idle */ ! 112: int nusers; /* number of users logged in now */ ! 113: char * sel_user; /* login of particular user selected */ ! 114: char firstchar; /* first char of name of prog invoked as */ ! 115: time_t jobtime; /* total cpu time visible */ ! 116: time_t now; /* the current time of day */ ! 117: struct timeval boottime; ! 118: time_t uptime; /* time of last reboot & elapsed time since */ ! 119: int np; /* number of processes currently active */ ! 120: struct utmp utmp; ! 121: struct proc mproc; ! 122: union { ! 123: struct user U_up; ! 124: char pad[NBPG][UPAGES]; ! 125: } Up; ! 126: #define up Up.U_up ! 127: ! 128: main(argc, argv) ! 129: char **argv; ! 130: { ! 131: int days, hrs, mins; ! 132: register int i, j; ! 133: char *cp; ! 134: register int curpid, empty; ! 135: ! 136: login = (argv[0][0] == '-'); ! 137: cp = rindex(argv[0], '/'); ! 138: firstchar = login ? argv[0][1] : (cp==0) ? argv[0][0] : cp[1]; ! 139: cp = argv[0]; /* for Usage */ ! 140: ! 141: while (argc > 1) { ! 142: if (argv[1][0] == '-') { ! 143: for (i=1; argv[1][i]; i++) { ! 144: switch(argv[1][i]) { ! 145: ! 146: case 'd': ! 147: debug++; ! 148: break; ! 149: ! 150: case 'h': ! 151: header = 0; ! 152: break; ! 153: ! 154: case 'l': ! 155: lflag++; ! 156: break; ! 157: ! 158: case 's': ! 159: lflag = 0; ! 160: break; ! 161: ! 162: case 'u': ! 163: case 'w': ! 164: firstchar = argv[1][i]; ! 165: break; ! 166: ! 167: default: ! 168: printf("Bad flag %s\n", argv[1]); ! 169: exit(1); ! 170: } ! 171: } ! 172: } else { ! 173: if (!isalnum(argv[1][0]) || argc > 2) { ! 174: printf("Usage: %s [ -hlsuw ] [ user ]\n", cp); ! 175: exit(1); ! 176: } else ! 177: sel_user = argv[1]; ! 178: } ! 179: argc--; argv++; ! 180: } ! 181: ! 182: if ((kmem = open("/dev/kmem", 0)) < 0) { ! 183: fprintf(stderr, "No kmem\n"); ! 184: exit(1); ! 185: } ! 186: nlist("/vmunix", nl); ! 187: if (nl[0].n_type==0) { ! 188: fprintf(stderr, "No namelist\n"); ! 189: exit(1); ! 190: } ! 191: ! 192: if (firstchar != 'u') ! 193: readpr(); ! 194: ! 195: ut = fopen("/etc/utmp","r"); ! 196: time(&now); ! 197: if (header) { ! 198: /* Print time of day */ ! 199: prtat(&now); ! 200: ! 201: /* ! 202: * Print how long system has been up. ! 203: * (Found by looking for "boottime" in kernel) ! 204: */ ! 205: lseek(kmem, (long)nl[X_BOOTTIME].n_value, 0); ! 206: read(kmem, &boottime, sizeof (boottime)); ! 207: ! 208: uptime = now - boottime.tv_sec; ! 209: uptime += 30; ! 210: days = uptime / (60*60*24); ! 211: uptime %= (60*60*24); ! 212: hrs = uptime / (60*60); ! 213: uptime %= (60*60); ! 214: mins = uptime / 60; ! 215: ! 216: printf(" up"); ! 217: if (days > 0) ! 218: printf(" %d day%s,", days, days>1?"s":""); ! 219: if (hrs > 0 && mins > 0) { ! 220: printf(" %2d:%02d,", hrs, mins); ! 221: } else { ! 222: if (hrs > 0) ! 223: printf(" %d hr%s,", hrs, hrs>1?"s":""); ! 224: if (mins > 0) ! 225: printf(" %d min%s,", mins, mins>1?"s":""); ! 226: } ! 227: ! 228: /* Print number of users logged in to system */ ! 229: while (fread(&utmp, sizeof(utmp), 1, ut)) { ! 230: if (utmp.ut_name[0] != '\0') ! 231: nusers++; ! 232: } ! 233: rewind(ut); ! 234: printf(" %d user%s", nusers, nusers>1?"s":""); ! 235: ! 236: /* ! 237: * Print 1, 5, and 15 minute load averages. ! 238: * (Found by looking in kernel for avenrun). ! 239: */ ! 240: printf(", load average:"); ! 241: lseek(kmem, (long)nl[X_AVENRUN].n_value, 0); ! 242: read(kmem, avenrun, sizeof(avenrun)); ! 243: for (i = 0; i < (sizeof(avenrun)/sizeof(avenrun[0])); i++) { ! 244: if (i > 0) ! 245: printf(","); ! 246: printf(" %.2f", avenrun[i]); ! 247: } ! 248: printf("\n"); ! 249: if (firstchar == 'u') ! 250: exit(0); ! 251: ! 252: /* Headers for rest of output */ ! 253: if (lflag) ! 254: printf("User tty login@ idle JCPU PCPU what\n"); ! 255: else ! 256: printf("User tty idle what\n"); ! 257: fflush(stdout); ! 258: } ! 259: ! 260: ! 261: for (;;) { /* for each entry in utmp */ ! 262: if (fread(&utmp, sizeof(utmp), 1, ut) == NULL) { ! 263: fclose(ut); ! 264: exit(0); ! 265: } ! 266: if (utmp.ut_name[0] == '\0') ! 267: continue; /* that tty is free */ ! 268: if (sel_user && strcmpn(utmp.ut_name, sel_user, NMAX) != 0) ! 269: continue; /* we wanted only somebody else */ ! 270: ! 271: gettty(); ! 272: jobtime = 0; ! 273: proctime = 0; ! 274: strcpy(doing, "-"); /* default act: normally never prints */ ! 275: empty = 1; ! 276: curpid = -1; ! 277: idle = findidle(); ! 278: for (i=0; i<np; i++) { /* for each process on this tty */ ! 279: if (!(TTYEQ)) ! 280: continue; ! 281: jobtime += pr[i].w_time + pr[i].w_ctime; ! 282: proctime += pr[i].w_time; ! 283: /* ! 284: * Meaning of debug fields following proc name is: ! 285: * & by itself: ignoring both SIGINT and QUIT. ! 286: * (==> this proc is not a candidate.) ! 287: * & <i> <q>: i is SIGINT status, q is quit. ! 288: * 0 == DFL, 1 == IGN, 2 == caught. ! 289: * *: proc pgrp == tty pgrp. ! 290: */ ! 291: if (debug) { ! 292: printf("\t\t%d\t%s", pr[i].w_pid, pr[i].w_args); ! 293: if ((j=pr[i].w_igintr) > 0) ! 294: if (j==IGINT) ! 295: printf(" &"); ! 296: else ! 297: printf(" & %d %d", j%3, j/3); ! 298: printf("\n"); ! 299: } ! 300: if (empty && pr[i].w_igintr!=IGINT) { ! 301: empty = 0; ! 302: curpid = -1; ! 303: } ! 304: if(pr[i].w_pid>curpid && (pr[i].w_igintr!=IGINT || empty)){ ! 305: curpid = pr[i].w_pid; ! 306: strcpy(doing, lflag ? pr[i].w_args : pr[i].w_comm); ! 307: #ifdef notdef ! 308: if (doing[0]==0 || doing[0]=='-' && doing[1]<=' ' || doing[0] == '?') { ! 309: strcat(doing, " ("); ! 310: strcat(doing, pr[i].w_comm); ! 311: strcat(doing, ")"); ! 312: } ! 313: #endif ! 314: } ! 315: } ! 316: putline(); ! 317: } ! 318: } ! 319: ! 320: /* figure out the major/minor device # pair for this tty */ ! 321: gettty() ! 322: { ! 323: char ttybuf[20]; ! 324: struct stat statbuf; ! 325: ! 326: ttybuf[0] = 0; ! 327: strcpy(ttybuf, "/dev/"); ! 328: strcat(ttybuf, utmp.ut_line); ! 329: stat(ttybuf, &statbuf); ! 330: tty = statbuf.st_rdev; ! 331: uid = statbuf.st_uid; ! 332: } ! 333: ! 334: /* ! 335: * putline: print out the accumulated line of info about one user. ! 336: */ ! 337: putline() ! 338: { ! 339: register int tm; ! 340: ! 341: /* print login name of the user */ ! 342: printf("%-*.*s ", NMAX, NMAX, utmp.ut_name); ! 343: ! 344: /* print tty user is on */ ! 345: if (lflag) ! 346: /* long form: all (up to) LMAX chars */ ! 347: printf("%-*.*s", LMAX, LMAX, utmp.ut_line); ! 348: else { ! 349: /* short form: 2 chars, skipping 'tty' if there */ ! 350: if (utmp.ut_line[0]=='t' && utmp.ut_line[1]=='t' && utmp.ut_line[2]=='y') ! 351: printf("%-2.2s", &utmp.ut_line[3]); ! 352: else ! 353: printf("%-2.2s", utmp.ut_line); ! 354: } ! 355: ! 356: if (lflag) ! 357: /* print when the user logged in */ ! 358: prtat(&utmp.ut_time); ! 359: ! 360: /* print idle time */ ! 361: if (idle >= 36 * 60) ! 362: printf("%2ddays ", (idle + 12 * 60) / (24 * 60)); ! 363: else ! 364: prttime(idle," "); ! 365: ! 366: if (lflag) { ! 367: /* print CPU time for all processes & children */ ! 368: prttime(jobtime," "); ! 369: /* print cpu time for interesting process */ ! 370: prttime(proctime," "); ! 371: } ! 372: ! 373: /* what user is doing, either command tail or args */ ! 374: printf(" %-.32s\n",doing); ! 375: fflush(stdout); ! 376: } ! 377: ! 378: /* find & return number of minutes current tty has been idle */ ! 379: findidle() ! 380: { ! 381: struct stat stbuf; ! 382: long lastaction, diff; ! 383: char ttyname[20]; ! 384: ! 385: strcpy(ttyname, "/dev/"); ! 386: strcatn(ttyname, utmp.ut_line, LMAX); ! 387: stat(ttyname, &stbuf); ! 388: time(&now); ! 389: lastaction = stbuf.st_atime; ! 390: diff = now - lastaction; ! 391: diff = DIV60(diff); ! 392: if (diff < 0) diff = 0; ! 393: return(diff); ! 394: } ! 395: ! 396: #define HR (60 * 60) ! 397: #define DAY (24 * HR) ! 398: #define MON (30 * DAY) ! 399: ! 400: /* ! 401: * prttime prints a time in hours and minutes or minutes and seconds. ! 402: * The character string tail is printed at the end, obvious ! 403: * strings to pass are "", " ", or "am". ! 404: */ ! 405: prttime(tim, tail) ! 406: time_t tim; ! 407: char *tail; ! 408: { ! 409: ! 410: if (tim >= 60) { ! 411: printf("%3d:", tim/60); ! 412: tim %= 60; ! 413: printf("%02d", tim); ! 414: } else if (tim > 0) ! 415: printf(" %2d", tim); ! 416: else ! 417: printf(" "); ! 418: printf("%s", tail); ! 419: } ! 420: ! 421: char *weekday[] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" }; ! 422: char *month[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", ! 423: "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; ! 424: ! 425: /* prtat prints a 12 hour time given a pointer to a time of day */ ! 426: prtat(time) ! 427: long *time; ! 428: { ! 429: struct tm *p; ! 430: register int hr, pm; ! 431: ! 432: p = localtime(time); ! 433: hr = p->tm_hour; ! 434: pm = (hr > 11); ! 435: if (hr > 11) ! 436: hr -= 12; ! 437: if (hr == 0) ! 438: hr = 12; ! 439: if (now - *time <= 18 * HR) ! 440: prttime(hr * 60 + p->tm_min, pm ? "pm" : "am"); ! 441: else if (now - *time <= 7 * DAY) ! 442: printf(" %s%2d%s", weekday[p->tm_wday], hr, pm ? "pm" : "am"); ! 443: else ! 444: printf(" %2d%s%2d", p->tm_mday, month[p->tm_mon], p->tm_year); ! 445: } ! 446: ! 447: /* ! 448: * readpr finds and reads in the array pr, containing the interesting ! 449: * parts of the proc and user tables for each live process. ! 450: */ ! 451: readpr() ! 452: { ! 453: int pn, mf, addr, c; ! 454: int szpt, pfnum, i; ! 455: struct pte *Usrptma, *usrpt, *pte, apte; ! 456: struct dblock db; ! 457: ! 458: Usrptma = (struct pte *) nl[X_USRPTMA].n_value; ! 459: usrpt = (struct pte *) nl[X_USRPT].n_value; ! 460: if((mem = open("/dev/mem", 0)) < 0) { ! 461: fprintf(stderr, "No mem\n"); ! 462: exit(1); ! 463: } ! 464: if ((swap = open("/dev/drum", 0)) < 0) { ! 465: fprintf(stderr, "No drum\n"); ! 466: exit(1); ! 467: } ! 468: /* ! 469: * read mem to find swap dev. ! 470: */ ! 471: lseek(kmem, (long)nl[X_SWAPDEV].n_value, 0); ! 472: read(kmem, &nl[X_SWAPDEV].n_value, sizeof(nl[X_SWAPDEV].n_value)); ! 473: /* ! 474: * Find base of and parameters of swap ! 475: */ ! 476: lseek(kmem, (long)nl[X_NSWAP].n_value, 0); ! 477: read(kmem, &nswap, sizeof(nswap)); ! 478: lseek(kmem, (long)nl[X_DMMIN].n_value, 0); ! 479: read(kmem, &dmmin, sizeof(dmmin)); ! 480: lseek(kmem, (long)nl[X_DMMAX].n_value, 0); ! 481: read(kmem, &dmmax, sizeof(dmmax)); ! 482: /* ! 483: * Locate proc table ! 484: */ ! 485: lseek(kmem, (long)nl[X_NPROC].n_value, 0); ! 486: read(kmem, &nproc, sizeof(nproc)); ! 487: pr = (struct pr *)calloc(nproc, sizeof (struct pr)); ! 488: np = 0; ! 489: lseek(kmem, (long)nl[X_PROC].n_value, 0); ! 490: read(kmem, &aproc, sizeof(aproc)); ! 491: for (pn=0; pn<nproc; pn++) { ! 492: lseek(kmem, (int)(aproc + pn), 0); ! 493: read(kmem, &mproc, sizeof mproc); ! 494: /* decide if it's an interesting process */ ! 495: if (mproc.p_stat==0 || mproc.p_stat==SZOMB || mproc.p_pgrp==0) ! 496: continue; ! 497: /* find & read in the user structure */ ! 498: if ((mproc.p_flag & SLOAD) == 0) { ! 499: /* not in memory - get from swap device */ ! 500: addr = dtob(mproc.p_swaddr); ! 501: lseek(swap, (long)addr, 0); ! 502: if (read(swap, &up, sizeof(up)) != sizeof(up)) { ! 503: continue; ! 504: } ! 505: } else { ! 506: int p0br, cc; ! 507: #define INTPPG (NBPG / sizeof (int)) ! 508: struct pte pagetbl[NBPG / sizeof (struct pte)]; ! 509: /* loaded, get each page from memory separately */ ! 510: szpt = mproc.p_szpt; ! 511: p0br = (int)mproc.p_p0br; ! 512: pte = &Usrptma[btokmx(mproc.p_p0br) + szpt-1]; ! 513: lseek(kmem, (long)pte, 0); ! 514: if (read(kmem, &apte, sizeof(apte)) != sizeof(apte)) ! 515: continue; ! 516: lseek(mem, ctob(apte.pg_pfnum), 0); ! 517: if (read(mem,pagetbl,sizeof(pagetbl)) != sizeof(pagetbl)) ! 518: cont: ! 519: continue; ! 520: for(cc=0; cc<UPAGES; cc++) { /* get u area */ ! 521: int upage = pagetbl[NPTEPG-UPAGES+cc].pg_pfnum; ! 522: lseek(mem,ctob(upage),0); ! 523: if (read(mem,((int *)&up)+INTPPG*cc,NBPG) != NBPG) ! 524: goto cont; ! 525: } ! 526: szpt = up.u_pcb.pcb_szpt; ! 527: pr[np].w_seekaddr = ctob(apte.pg_pfnum); ! 528: } ! 529: vstodb(0, CLSIZE, &up.u_smap, &db, 1); ! 530: pr[np].w_lastpg = dtob(db.db_base); ! 531: if (up.u_ttyp == NULL) ! 532: continue; ! 533: ! 534: /* save the interesting parts */ ! 535: pr[np].w_pid = mproc.p_pid; ! 536: pr[np].w_flag = mproc.p_flag; ! 537: pr[np].w_size = mproc.p_dsize + mproc.p_ssize; ! 538: pr[np].w_igintr = (((int)up.u_signal[2]==1) + ! 539: 2*((int)up.u_signal[2]>1) + 3*((int)up.u_signal[3]==1)) + ! 540: 6*((int)up.u_signal[3]>1); ! 541: pr[np].w_time = ! 542: up.u_ru.ru_utime.tv_sec + up.u_ru.ru_stime.tv_sec; ! 543: pr[np].w_ctime = ! 544: up.u_cru.ru_utime.tv_sec + up.u_cru.ru_stime.tv_sec; ! 545: pr[np].w_tty = up.u_ttyd; ! 546: pr[np].w_uid = mproc.p_uid; ! 547: up.u_comm[14] = 0; /* Bug: This bombs next field. */ ! 548: strcpy(pr[np].w_comm, up.u_comm); ! 549: /* ! 550: * Get args if there's a chance we'll print it. ! 551: * Cant just save pointer: getargs returns static place. ! 552: * Cant use strcpyn: that crock blank pads. ! 553: */ ! 554: pr[np].w_args[0] = 0; ! 555: strcatn(pr[np].w_args,getargs(&pr[np]),ARGWIDTH); ! 556: if (pr[np].w_args[0]==0 || pr[np].w_args[0]=='-' && pr[np].w_args[1]<=' ' || pr[np].w_args[0] == '?') { ! 557: strcat(pr[np].w_args, " ("); ! 558: strcat(pr[np].w_args, pr[np].w_comm); ! 559: strcat(pr[np].w_args, ")"); ! 560: } ! 561: np++; ! 562: } ! 563: } ! 564: ! 565: /* ! 566: * getargs: given a pointer to a proc structure, this looks at the swap area ! 567: * and tries to reconstruct the arguments. This is straight out of ps. ! 568: */ ! 569: char * ! 570: getargs(p) ! 571: struct pr *p; ! 572: { ! 573: int c, addr, nbad; ! 574: static int abuf[CLSIZE*NBPG/sizeof(int)]; ! 575: struct pte pagetbl[NPTEPG]; ! 576: register int *ip; ! 577: register char *cp, *cp1; ! 578: ! 579: if ((p->w_flag & SLOAD) == 0) { ! 580: lseek(swap, p->w_lastpg, 0); ! 581: if (read(swap, abuf, sizeof(abuf)) != sizeof(abuf)) ! 582: return(p->w_comm); ! 583: } else { ! 584: c = p->w_seekaddr; ! 585: lseek(mem,c,0); ! 586: if (read(mem,pagetbl,NBPG) != NBPG) ! 587: return(p->w_comm); ! 588: if (pagetbl[NPTEPG-CLSIZE-UPAGES].pg_fod==0 && pagetbl[NPTEPG-CLSIZE-UPAGES].pg_pfnum) { ! 589: lseek(mem,ctob(pagetbl[NPTEPG-CLSIZE-UPAGES].pg_pfnum),0); ! 590: if (read(mem,abuf,sizeof(abuf)) != sizeof(abuf)) ! 591: return(p->w_comm); ! 592: } else { ! 593: lseek(swap, p->w_lastpg, 0); ! 594: if (read(swap, abuf, sizeof(abuf)) != sizeof(abuf)) ! 595: return(p->w_comm); ! 596: } ! 597: } ! 598: abuf[sizeof(abuf)/sizeof(abuf[0])-1] = 0; ! 599: for (ip = &abuf[sizeof(abuf)/sizeof(abuf[0])-2]; ip > abuf;) { ! 600: /* Look from top for -1 or 0 as terminator flag. */ ! 601: if (*--ip == -1 || *ip == 0) { ! 602: cp = (char *)(ip+1); ! 603: if (*cp==0) ! 604: cp++; ! 605: nbad = 0; /* up to 5 funny chars as ?'s */ ! 606: for (cp1 = cp; cp1 < (char *)&abuf[sizeof(abuf)/sizeof(abuf[0])]; cp1++) { ! 607: c = *cp1&0177; ! 608: if (c==0) /* nulls between args => spaces */ ! 609: *cp1 = ' '; ! 610: else if (c < ' ' || c > 0176) { ! 611: if (++nbad >= 5) { ! 612: *cp1++ = ' '; ! 613: break; ! 614: } ! 615: *cp1 = '?'; ! 616: } else if (c=='=') { /* Oops - found an ! 617: * environment var, back ! 618: * over & erase it. */ ! 619: *cp1 = 0; ! 620: while (cp1>cp && *--cp1!=' ') ! 621: *cp1 = 0; ! 622: break; ! 623: } ! 624: } ! 625: while (*--cp1==' ') /* strip trailing spaces */ ! 626: *cp1 = 0; ! 627: return(cp); ! 628: } ! 629: } ! 630: return (p->w_comm); ! 631: } ! 632: ! 633: /* ! 634: * Given a base/size pair in virtual swap area, ! 635: * return a physical base/size pair which is the ! 636: * (largest) initial, physically contiguous block. ! 637: */ ! 638: vstodb(vsbase, vssize, dmp, dbp, rev) ! 639: register int vsbase; ! 640: int vssize; ! 641: struct dmap *dmp; ! 642: register struct dblock *dbp; ! 643: { ! 644: register int blk = dmmin; ! 645: register swblk_t *ip = dmp->dm_map; ! 646: ! 647: vsbase = ctod(vsbase); ! 648: vssize = ctod(vssize); ! 649: if (vsbase < 0 || vsbase + vssize > dmp->dm_size) ! 650: panic("vstodb"); ! 651: while (vsbase >= blk) { ! 652: vsbase -= blk; ! 653: if (blk < dmmax) ! 654: blk *= 2; ! 655: ip++; ! 656: } ! 657: if (*ip <= 0 || *ip + blk > nswap) ! 658: panic("vstodb *ip"); ! 659: dbp->db_size = min(vssize, blk - vsbase); ! 660: dbp->db_base = *ip + (rev ? blk - (vsbase + dbp->db_size) : vsbase); ! 661: } ! 662: ! 663: panic(cp) ! 664: char *cp; ! 665: { ! 666: ! 667: /* printf("%s\n", cp); */ ! 668: } ! 669: ! 670: min(a, b) ! 671: { ! 672: ! 673: return (a < b ? a : b); ! 674: }
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