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1.1 ! root 1: /* ! 2: * w - print system status (who and what) ! 3: * ! 4: * This program is similar to the systat command on Tenex/Tops 10/20 ! 5: * It needs read permission on /dev/mem, /dev/kmem, and /dev/drum. ! 6: */ ! 7: #include <sys/param.h> ! 8: #include <a.out.h> ! 9: #include <stdio.h> ! 10: #include <utmp.h> ! 11: #include <psout.h> ! 12: #include <time.h> ! 13: #include <sys/stat.h> ! 14: #include <sys/proc.h> ! 15: #include <sys/dir.h> ! 16: #include <sys/user.h> ! 17: #include <sys/pte.h> ! 18: #include <sys/vm.h> ! 19: ! 20: #define ARGWIDTH 33 /* # chars left on 80 col crt for args */ ! 21: ! 22: struct smproc { ! 23: char w_flag; /* proc.p_flag */ ! 24: short w_size; /* proc.p_size */ ! 25: long w_seekaddr; /* where to find args */ ! 26: long w_lastpg; /* disk address of stack */ ! 27: int w_igintr; /* true if ignores INTR and QUIT */ ! 28: time_t w_time; /* CPU time used by this process */ ! 29: time_t w_ctime; /* CPU time used by children */ ! 30: dev_t w_tty; /* tty device of process */ ! 31: char w_comm[15]; /* user.u_comm, null terminated */ ! 32: char w_args[ARGWIDTH+1]; /* args if interesting process */ ! 33: } pr[NPROC]; ! 34: ! 35: struct nlist nl[] = { ! 36: { "_proc" }, ! 37: #define X_PROC 0 ! 38: { "_swapdev" }, ! 39: #define X_SWAPDEV 1 ! 40: { "_swplo" }, ! 41: #define X_SWPLO 2 ! 42: { "_Usrptma" }, ! 43: #define X_USRPTMA 3 ! 44: { "_usrpt" }, ! 45: #define X_USRPT 4 ! 46: { "_nswap" }, ! 47: #define X_NSWAP 5 ! 48: { "_avenrun" }, ! 49: #define X_AVENRUN 6 ! 50: { "_bootime" }, ! 51: #define X_BOOTIME 7 ! 52: { 0 }, ! 53: }; ! 54: ! 55: FILE *ps; ! 56: FILE *ut; ! 57: FILE *bootfd; ! 58: int kmem; ! 59: int mem; ! 60: int swap; /* /dev/kmem, mem, and swap */ ! 61: int nswap; ! 62: dev_t tty; ! 63: char doing[520]; /* process attached to terminal */ ! 64: time_t proctime; /* cpu time of process in doing */ ! 65: double avenrun[3]; ! 66: ! 67: #define DIV60(t) ((t+30)/60) /* x/60 rounded */ ! 68: #define TTYEQ (tty == pr[i].w_tty) ! 69: ! 70: char *getargs(); ! 71: char *fread(); ! 72: char *ctime(); ! 73: FILE *popen(); ! 74: struct tm *localtime(); ! 75: ! 76: int debug; /* true if -d flag: debugging output */ ! 77: int header = 1; /* true if -h flag: don't print heading */ ! 78: int lflag = 1; /* true if -l flag: long style output */ ! 79: int login; /* true if invoked as login shell */ ! 80: int idle; /* number of minutes user is idle */ ! 81: time_t jobtime; /* total cpu time visible */ ! 82: time_t now; /* the current time of day */ ! 83: struct tm *nowt; /* current time as time struct */ ! 84: time_t bootime, uptime; /* time of last reboot & elapsed time since */ ! 85: int np; /* number of processes currently active */ ! 86: struct utmp utmp; ! 87: struct proc mproc; ! 88: struct user up; ! 89: char fill[512]; ! 90: ! 91: main(argc, argv) ! 92: char **argv; ! 93: { ! 94: int days; ! 95: register int i; ! 96: int empty; ! 97: char obuf[BUFSIZ]; ! 98: ! 99: setbuf(stdout, obuf); ! 100: login = (argv[0][0] == '-'); ! 101: while (argc > 1) { ! 102: if (argv[1][0] == '-') { ! 103: for (i=1; argv[1][i]; i++) { ! 104: switch(argv[1][i]) { ! 105: ! 106: case 'd': ! 107: debug++; ! 108: break; ! 109: ! 110: case 'h': ! 111: header = 0; ! 112: break; ! 113: ! 114: case 'l': ! 115: lflag++; ! 116: break; ! 117: case 's': ! 118: lflag = 0; ! 119: break; ! 120: ! 121: default: ! 122: printf("Bad flag %s\n", argv[1]); ! 123: exit(1); ! 124: } ! 125: } ! 126: argc--; argv++; ! 127: } else { ! 128: printf("Usage: %s [ -lh ]\n", argv[0]); ! 129: exit(1); ! 130: } ! 131: } ! 132: ! 133: readpr(); ! 134: ! 135: ut = fopen("/etc/utmp","r"); ! 136: if (header) { ! 137: time(&now); ! 138: nowt = localtime(&now); ! 139: prtat(nowt); ! 140: lseek(kmem, (long)nl[X_BOOTIME].n_value, 0); ! 141: read(kmem, &bootime, sizeof (bootime)); ! 142: uptime = now - bootime; ! 143: printf(" up"); ! 144: days = uptime / (60*60*24); ! 145: if (days > 0) { ! 146: printf(" %d day%s, ", days, days>1?"s":""); ! 147: uptime %= (60*60*24); ! 148: } ! 149: prttime(DIV60(uptime), ""); ! 150: printf("\t\t"); ! 151: printf("load average:"); ! 152: lseek(kmem, (long)nl[X_AVENRUN].n_value, 0); ! 153: read(kmem, avenrun, sizeof(avenrun)); ! 154: for (i = 0; i < 3; i++) { ! 155: printf(" %.2f", avenrun[i]); ! 156: if (i < 2) ! 157: printf(","); ! 158: } ! 159: printf("\n"); ! 160: if (lflag) ! 161: printf("User tty login@ idle JCPU PCPU what\n"); ! 162: else ! 163: printf("User tty idle what\n"); ! 164: fflush(stdout); ! 165: } ! 166: for (;;) { /* for each entry in utmp */ ! 167: if (fread(&utmp, sizeof(utmp), 1, ut) == NULL) { ! 168: fclose(ut); ! 169: exit(0); ! 170: } ! 171: if (utmp.ut_name[0] == '\0') ! 172: continue; /* that tty is free */ ! 173: gettty(); ! 174: jobtime = 0; ! 175: proctime = 0; ! 176: strcpy(doing, "-"); /* default act: normally never prints */ ! 177: empty = 1; ! 178: idle = findidle(); ! 179: for (i=0; i<np; i++) { /* for each process on this tty */ ! 180: if (!(TTYEQ)) ! 181: continue; ! 182: jobtime += pr[i].w_time + pr[i].w_ctime; ! 183: proctime += pr[i].w_time; ! 184: if (!pr[i].w_igintr || empty) { ! 185: if (!pr[i].w_igintr) ! 186: empty = 0; ! 187: strcpy(doing, lflag ? pr[i].w_args : pr[i].w_comm); ! 188: if (doing[0]==0 || doing[0]=='-' && doing[1]<=' ' || doing[0] == '?') { ! 189: strcat(doing, " ("); ! 190: strcat(doing, pr[i].w_comm); ! 191: strcat(doing, ")"); ! 192: } ! 193: } ! 194: } ! 195: putline(); ! 196: } ! 197: } ! 198: ! 199: /* figure out the major/minor device # pair for this tty */ ! 200: gettty() ! 201: { ! 202: char ttybuf[20]; ! 203: struct stat statbuf; ! 204: ! 205: ttybuf[0] = 0; ! 206: strcpy(ttybuf, "/dev/"); ! 207: strcat(ttybuf, utmp.ut_line); ! 208: stat(ttybuf, &statbuf); ! 209: tty = statbuf.st_rdev; ! 210: } ! 211: ! 212: /* ! 213: * putline: print out the accumulated line of info about one user. ! 214: */ ! 215: putline() ! 216: { ! 217: register int tm; ! 218: ! 219: /* print login name of the user */ ! 220: printf("%-8.8s ", utmp.ut_name); ! 221: ! 222: /* print tty user is on */ ! 223: if (lflag) ! 224: /* long form: all (up to) 8 chars */ ! 225: printf("%-8.8s", utmp.ut_line); ! 226: else { ! 227: /* short form: 2 chars, skipping 'tty' if there */ ! 228: if (utmp.ut_line[0]=='t' && utmp.ut_line[1]=='t' && utmp.ut_line[2]=='y') ! 229: printf("%-2.2s", &utmp.ut_line[3]); ! 230: else ! 231: printf("%-2.2s", utmp.ut_line); ! 232: } ! 233: ! 234: if (lflag) ! 235: /* print when the user logged in */ ! 236: prtat(localtime(&utmp.ut_time)); ! 237: ! 238: /* print idle time */ ! 239: prttime(idle," "); ! 240: ! 241: if (lflag) { ! 242: /* print CPU time for all processes & children */ ! 243: prttime(DIV60(jobtime)," "); ! 244: /* print cpu time for interesting process */ ! 245: prttime(DIV60(proctime)," "); ! 246: } ! 247: ! 248: /* what user is doing, either command tail or args */ ! 249: printf(" %-.32s\n",doing); ! 250: fflush(stdout); ! 251: } ! 252: ! 253: /* find & return number of minutes current tty has been idle */ ! 254: findidle() ! 255: { ! 256: struct stat stbuf; ! 257: long lastaction, diff; ! 258: char ttyname[20]; ! 259: ! 260: strcpy(ttyname, "/dev/"); ! 261: strcatn(ttyname, utmp.ut_line, 8); ! 262: stat(ttyname, &stbuf); ! 263: time(&now); ! 264: lastaction = stbuf.st_atime; ! 265: diff = now - lastaction; ! 266: diff = DIV60(diff); ! 267: if (diff < 0) diff = 0; ! 268: return(diff); ! 269: } ! 270: ! 271: /* ! 272: * prttime prints a time in hours and minutes. ! 273: * The character string tail is printed at the end, obvious ! 274: * strings to pass are "", " ", or "am". ! 275: */ ! 276: prttime(tim, tail) ! 277: time_t tim; ! 278: char *tail; ! 279: { ! 280: register int didhrs = 0; ! 281: ! 282: if (tim >= 60) { ! 283: printf("%3d:", tim/60); ! 284: didhrs++; ! 285: } else { ! 286: printf(" "); ! 287: } ! 288: tim %= 60; ! 289: if (tim > 0 || didhrs) { ! 290: printf(didhrs&&tim<10 ? "%02d" : "%2d", tim); ! 291: } else { ! 292: printf(" "); ! 293: } ! 294: printf("%s", tail); ! 295: } ! 296: ! 297: /* prtat prints a 12 hour time given a pointer to a time of day */ ! 298: prtat(p) ! 299: struct tm *p; ! 300: { ! 301: register int t, pm; ! 302: ! 303: t = p -> tm_hour; ! 304: pm = (t > 11); ! 305: if (t > 11) ! 306: t -= 12; ! 307: if (t == 0) ! 308: t = 12; ! 309: prttime(t*60 + p->tm_min, pm ? "pm" : "am"); ! 310: } ! 311: ! 312: /* ! 313: * readpr finds and reads in the array pr, containing the interesting ! 314: * parts of the proc and user tables for each live process. ! 315: */ ! 316: readpr() ! 317: { ! 318: int pn, mf, addr, c; ! 319: int szpt, pfnum, i; ! 320: struct pte *Usrptma, *usrpt, *pte, apte; ! 321: daddr_t swplo; ! 322: struct dblock db; ! 323: ! 324: nlist("/vmunix", nl); ! 325: if (nl[0].n_type==0) { ! 326: fprintf(stderr, "No namelist\n"); ! 327: exit(1); ! 328: } ! 329: Usrptma = (struct pte *) nl[X_USRPTMA].n_value; ! 330: usrpt = (struct pte *) nl[X_USRPT].n_value; ! 331: if ((kmem = open("/dev/kmem", 0)) < 0) { ! 332: fprintf(stderr, "No kmem\n"); ! 333: exit(1); ! 334: } ! 335: if((mem = open("/dev/mem", 0)) < 0) { ! 336: fprintf(stderr, "No mem\n"); ! 337: exit(1); ! 338: } ! 339: if ((swap = open("/dev/drum", 0)) < 0) { ! 340: fprintf(stderr, "No drum\n"); ! 341: exit(1); ! 342: } ! 343: /* ! 344: * read mem to find swap dev. ! 345: */ ! 346: lseek(kmem, (long)nl[X_SWAPDEV].n_value, 0); ! 347: read(kmem, &nl[X_SWAPDEV].n_value, sizeof(nl[X_SWAPDEV].n_value)); ! 348: /* ! 349: * Find base of swap ! 350: */ ! 351: lseek(kmem, (long)nl[X_SWPLO].n_value, 0); ! 352: read(kmem, &swplo, sizeof(swplo)); ! 353: lseek(kmem, (long)nl[X_NSWAP].n_value, 0); ! 354: read(kmem, &nswap, sizeof(nswap)); ! 355: /* ! 356: * Locate proc table ! 357: */ ! 358: np = 0; ! 359: for (pn=0; pn<NPROC; pn++) { ! 360: lseek(kmem, (long)(nl[X_PROC].n_value + pn*(sizeof mproc)), 0); ! 361: read(kmem, &mproc, sizeof mproc); ! 362: /* decide if it's an interesting process */ ! 363: if (mproc.p_stat==0 || mproc.p_pgrp==0) ! 364: continue; ! 365: ! 366: /* find & read in the user structure */ ! 367: if ((mproc.p_flag & SLOAD) == 0) { ! 368: /* not in memory - get from swap device */ ! 369: addr = (mproc.p_swaddr+swplo)<<9; ! 370: lseek(swap, (long)addr, 0); ! 371: if (read(swap, &up, sizeof(up)) != sizeof(up)) { ! 372: continue; ! 373: } ! 374: } else { ! 375: /* in memory - find pages */ ! 376: for(c=0; c<UPAGES; c++) { ! 377: lseek(mem,mproc.p_addr[c]<<9,0); ! 378: addr = (int) ((char *)&up) + 512*c; ! 379: if ((mf=read(mem,addr,512)) != 512) ! 380: continue; ! 381: } ! 382: szpt = up.u_pcb.pcb_szpt; ! 383: pte = &Usrptma[btokmx(mproc.p_p0br) + szpt-1]; ! 384: lseek(kmem, (int)pte, 0); ! 385: read(kmem, &apte, sizeof(apte)); ! 386: pr[np].w_seekaddr = ctob(apte.pg_pfnum); ! 387: } ! 388: vstodb(0, 1, &up.u_smap, &db, 1); ! 389: pr[np].w_lastpg = ctob(swplo + db.db_base); ! 390: if (up.u_ttyp == NULL) ! 391: continue; ! 392: ! 393: /* save the interesting parts */ ! 394: pr[np].w_flag = mproc.p_flag; ! 395: pr[np].w_size = mproc.p_dsize + mproc.p_ssize; ! 396: pr[np].w_igintr = (up.u_signal[2]==1 && up.u_signal[3]==1); ! 397: pr[np].w_time = up.u_utime + up.u_stime; ! 398: pr[np].w_ctime = up.u_cutime + up.u_cstime; ! 399: pr[np].w_tty = up.u_ttyd; ! 400: up.u_comm[14] = 0; /* Bug: This bombs next field. */ ! 401: strcpy(pr[np].w_comm, up.u_comm); ! 402: if (pr[np].w_igintr == 0) { ! 403: /* ! 404: * Get args if there's a chance we'll print it. ! 405: * Cant just save pointer: getargs returns static place. ! 406: * Cant use strcpyn: that crock blank pads. ! 407: */ ! 408: pr[np].w_args[0] = 0; ! 409: strcatn(pr[np].w_args,getargs(&pr[np]),ARGWIDTH); ! 410: } ! 411: np++; ! 412: } ! 413: } ! 414: ! 415: /* ! 416: * getargs: given a pointer to a proc structure, this looks at the swap area ! 417: * and tries to reconstruct the arguments. This is straight out of ps. ! 418: */ ! 419: char * ! 420: getargs(p) ! 421: struct smproc *p; ! 422: { ! 423: int c, addr, nbad; ! 424: static int abuf[512/sizeof(int)]; ! 425: struct pte pagetbl[NPTEPG]; ! 426: register int *ip; ! 427: register char *cp, *cp1; ! 428: ! 429: if ((p->w_flag & SLOAD) == 0) { ! 430: lseek(swap, p->w_lastpg, 0); ! 431: if (read(swap, abuf, sizeof(abuf)) != sizeof(abuf)) ! 432: return(p->w_comm); ! 433: } else { ! 434: c = p->w_seekaddr; ! 435: lseek(mem,c,0); ! 436: if (read(mem,pagetbl,NBPG) != NBPG) ! 437: return(p->w_comm); ! 438: if (pagetbl[NPTEPG-1].pg_fod==0 && pagetbl[NPTEPG-1].pg_pfnum) { ! 439: lseek(mem,ctob(pagetbl[NPTEPG-1].pg_pfnum),0); ! 440: if (read(mem,abuf,sizeof(abuf)) != sizeof(abuf)) ! 441: return(p->w_comm); ! 442: } else { ! 443: lseek(swap, p->w_lastpg, 0); ! 444: if (read(swap, abuf, sizeof(abuf)) != sizeof(abuf)) ! 445: return(p->w_comm); ! 446: } ! 447: } ! 448: abuf[127] = 0; ! 449: for (ip = &abuf[126]; ip > abuf;) { ! 450: /* Look from top for -1 or 0 as terminator flag. */ ! 451: if (*--ip == -1 || *ip == 0) { ! 452: cp = (char *)(ip+1); ! 453: if (*cp==0) ! 454: cp++; ! 455: nbad = 0; /* up to 5 funny chars as ?'s */ ! 456: for (cp1 = cp; cp1 < (char *)&abuf[128]; cp1++) { ! 457: c = *cp1&0177; ! 458: if (c==0) /* nulls between args => spaces */ ! 459: *cp1 = ' '; ! 460: else if (c < ' ' || c > 0176) { ! 461: if (++nbad >= 5) { ! 462: *cp1++ = ' '; ! 463: break; ! 464: } ! 465: *cp1 = '?'; ! 466: } else if (c=='=') { /* Oops - found an ! 467: * environment var, back ! 468: * over & erase it. */ ! 469: *cp1 = 0; ! 470: while (cp1>cp && *--cp1!=' ') ! 471: *cp1 = 0; ! 472: break; ! 473: } ! 474: } ! 475: while (*--cp1==' ') /* strip trailing spaces */ ! 476: *cp1 = 0; ! 477: return(cp); ! 478: } ! 479: } ! 480: return (p->w_comm); ! 481: } ! 482: ! 483: /* ! 484: * Given a base/size pair in virtual swap area, ! 485: * return a physical base/size pair which is the ! 486: * (largest) initial, physically contiguous block. ! 487: */ ! 488: vstodb(vsbase, vssize, dmp, dbp, rev) ! 489: register int vsbase; ! 490: int vssize; ! 491: struct dmap *dmp; ! 492: register struct dblock *dbp; ! 493: { ! 494: register int blk = DMMIN; ! 495: register swblk_t *ip = dmp->dm_map; ! 496: ! 497: if (vsbase < 0 || vsbase + vssize > dmp->dm_size) ! 498: panic("vstodb"); ! 499: while (vsbase >= blk) { ! 500: vsbase -= blk; ! 501: if (blk < DMMAX) ! 502: blk *= 2; ! 503: ip++; ! 504: } ! 505: if (*ip <= 0 || *ip + blk > nswap) ! 506: panic("vstodb *ip"); ! 507: dbp->db_size = min(vssize, blk - vsbase); ! 508: dbp->db_base = *ip + (rev ? blk - (vsbase + dbp->db_size) : vsbase); ! 509: } ! 510: ! 511: panic(cp) ! 512: char *cp; ! 513: { ! 514: ! 515: /* printf("%s\n", cp); */ ! 516: } ! 517: ! 518: min(a, b) ! 519: { ! 520: ! 521: return (a < b ? a : b); ! 522: }
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