1 #ifndef lint 2 static char sccsid[] = "@(#)rwho.c 4.1 82/04/02"; 3 #endif 4 5 #include <sys/types.h> /* botch in ndir.h */ 6 #include <stdio.h> 7 #include <ndir.h> 8 #include <utmp.h> 9 #include "rwhod.h" 10 11 DIR *etc; 12 13 struct whod wd; 14 int utmpcmp(); 15 #define NUSERS 1000 16 struct myutmp { 17 char myhost[32]; 18 int myidle; 19 struct utmp myutmp; 20 } myutmp[NUSERS]; 21 int nusers; 22 23 #define WHDRSIZE (sizeof (wd) - sizeof (wd.wd_we)) 24 25 char *ctime(), *strcpy(); 26 int now; 27 int aflg; 28 29 main(argc, argv) 30 int argc; 31 char **argv; 32 { 33 struct direct *dp; 34 int cc, width; 35 register struct whod *w = &wd; 36 register struct whoent *we; 37 register struct myutmp *mp; 38 int f, n, i; 39 40 argc--, argv++; 41 again: 42 if (argc > 0 && !strcmp(argv[0], "-a")) { 43 argc--, argv++; 44 aflg++; 45 goto again; 46 } 47 (void) time(&now); 48 if (chdir("/etc") < 0) { 49 perror("/etc"); 50 exit(1); 51 } 52 etc = opendir("."); 53 if (etc == NULL) { 54 perror("/etc"); 55 exit(1); 56 } 57 mp = myutmp; 58 while (dp = readdir(etc)) { 59 if (dp->d_ino == 0) 60 continue; 61 if (strncmp(dp->d_name, "whod.", 5)) 62 continue; 63 f = open(dp->d_name, 0); 64 if (f < 0) 65 continue; 66 cc = read(f, (char *)&wd, sizeof (struct whod)); 67 if (cc < WHDRSIZE) { 68 (void) close(f); 69 continue; 70 } 71 if (now - w->wd_recvtime > 5 * 60) { 72 (void) close(f); 73 continue; 74 } 75 cc -= WHDRSIZE; 76 we = w->wd_we; 77 for (n = cc / sizeof (struct whoent); n > 0; n--) { 78 if (aflg == 0 && we->we_idle >= 60*60) { 79 we++; 80 continue; 81 } 82 if (nusers >= NUSERS) { 83 printf("too many users\n"); 84 exit(1); 85 } 86 mp->myutmp = we->we_utmp; mp->myidle = we->we_idle; 87 (void) strcpy(mp->myhost, w->wd_hostname); 88 nusers++; we++; mp++; 89 } 90 (void) close(f); 91 } 92 qsort((char *)myutmp, nusers, sizeof (struct myutmp), utmpcmp); 93 mp = myutmp; 94 width = 0; 95 for (i = 0; i < nusers; i++) { 96 int j = strlen(mp->myhost) + 1 + strlen(mp->myutmp.ut_line); 97 if (j > width) 98 width = j; 99 mp++; 100 } 101 mp = myutmp; 102 for (i = 0; i < nusers; i++) { 103 char buf[22]; 104 sprintf(buf, "%s:%s", mp->myhost, mp->myutmp.ut_line); 105 printf("%-8.8s %-*s %.12s", 106 mp->myutmp.ut_name, 107 width, 108 buf, 109 ctime((time_t *)&mp->myutmp.ut_time)+4); 110 mp->myidle /= 60; 111 if (mp->myidle) { 112 if (aflg) { 113 if (mp->myidle >= 100*60) 114 mp->myidle = 100*60 - 1; 115 if (mp->myidle >= 60) 116 printf(" %2d", mp->myidle / 60); 117 else 118 printf(" "); 119 } else 120 printf(" "); 121 printf(":%02d", mp->myidle % 60); 122 } 123 printf("\n"); 124 mp++; 125 } 126 exit(0); 127 } 128 129 utmpcmp(u1, u2) 130 struct myutmp *u1, *u2; 131 { 132 int rc; 133 134 rc = strncmp(u1->myutmp.ut_name, u2->myutmp.ut_name, 8); 135 if (rc) 136 return (rc); 137 rc = strncmp(u1->myhost, u2->myhost, 8); 138 if (rc) 139 return (rc); 140 return (strncmp(u1->myutmp.ut_line, u2->myutmp.ut_line, 8)); 141 } 142