| 1 | #ifndef lint |
| 2 | static char *sccsid = "@(#)lastcomm.c 4.9 (Berkeley) %G%"; |
| 3 | #endif |
| 4 | |
| 5 | /* |
| 6 | * last command |
| 7 | */ |
| 8 | #include <sys/param.h> |
| 9 | #include <sys/acct.h> |
| 10 | #include <sys/file.h> |
| 11 | |
| 12 | #include <stdio.h> |
| 13 | #include <pwd.h> |
| 14 | #include <sys/stat.h> |
| 15 | #include <utmp.h> |
| 16 | #include <struct.h> |
| 17 | #include <ctype.h> |
| 18 | |
| 19 | struct acct buf[DEV_BSIZE / sizeof (struct acct)]; |
| 20 | |
| 21 | time_t expand(); |
| 22 | char *flagbits(); |
| 23 | char *getname(); |
| 24 | char *getdev(); |
| 25 | |
| 26 | main(argc, argv) |
| 27 | char *argv[]; |
| 28 | { |
| 29 | register int bn, cc; |
| 30 | register struct acct *acp; |
| 31 | int fd; |
| 32 | struct stat sb; |
| 33 | |
| 34 | fd = open("/usr/adm/acct", O_RDONLY); |
| 35 | if (fd < 0) { |
| 36 | perror("/usr/adm/acct"); |
| 37 | exit(1); |
| 38 | } |
| 39 | fstat(fd, &sb); |
| 40 | for (bn = btodb(sb.st_size) - 1; bn >= 0; bn--) { |
| 41 | lseek(fd, bn * DEV_BSIZE, L_SET); |
| 42 | cc = read(fd, buf, DEV_BSIZE); |
| 43 | if (cc < 0) { |
| 44 | perror("read"); |
| 45 | break; |
| 46 | } |
| 47 | acp = buf + (cc / sizeof (buf[0])) - 1; |
| 48 | for (; acp >= buf; acp--) { |
| 49 | register char *cp; |
| 50 | time_t x = |
| 51 | expand(acp->ac_utime) + expand(acp->ac_stime); |
| 52 | |
| 53 | acp->ac_comm[10] = '\0'; |
| 54 | if (*acp->ac_comm == '\0') |
| 55 | strcpy(acp->ac_comm, "?"); |
| 56 | for (cp = acp->ac_comm; *cp; cp++) |
| 57 | if (iscntrl(*cp)) |
| 58 | *cp = '?'; |
| 59 | if (!ok(argc, argv, acp) && argc != 1) |
| 60 | continue; |
| 61 | printf("%-*s %s %-*s %-*s %4d sec%s %.16s\n", |
| 62 | fldsiz(acct, ac_comm), acp->ac_comm, |
| 63 | flagbits(acp->ac_flag), |
| 64 | fldsiz(utmp, ut_name), getname(acp->ac_uid), |
| 65 | fldsiz(utmp, ut_line), getdev(acp->ac_tty), |
| 66 | x, x > 1 || x == 0 ? "s" : " ", |
| 67 | ctime(&acp->ac_btime)); |
| 68 | } |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | time_t |
| 73 | expand (t) |
| 74 | unsigned t; |
| 75 | { |
| 76 | register time_t nt; |
| 77 | |
| 78 | nt = t & 017777; |
| 79 | t >>= 13; |
| 80 | while (t) { |
| 81 | t--; |
| 82 | nt <<= 3; |
| 83 | } |
| 84 | return (nt); |
| 85 | } |
| 86 | |
| 87 | char * |
| 88 | flagbits(f) |
| 89 | register int f; |
| 90 | { |
| 91 | register int i = 0; |
| 92 | static char flags[20]; |
| 93 | |
| 94 | #define BIT(flag, ch) flags[i++] = (f & flag) ? ch : ' ' |
| 95 | BIT(ASU, 'S'); |
| 96 | BIT(AFORK, 'F'); |
| 97 | BIT(ACOMPAT, 'C'); |
| 98 | BIT(ACORE, 'D'); |
| 99 | BIT(AXSIG, 'X'); |
| 100 | flags[i] = '\0'; |
| 101 | return (flags); |
| 102 | } |
| 103 | |
| 104 | ok(argc, argv, acp) |
| 105 | register int argc; |
| 106 | register char *argv[]; |
| 107 | register struct acct *acp; |
| 108 | { |
| 109 | register int j; |
| 110 | |
| 111 | for (j = 1; j < argc; j++) |
| 112 | if (strcmp(getname(acp->ac_uid), argv[j]) && |
| 113 | strcmp(getdev(acp->ac_tty), argv[j]) && |
| 114 | strcmp(acp->ac_comm, argv[j])) |
| 115 | break; |
| 116 | return (j == argc); |
| 117 | } |
| 118 | |
| 119 | /* should be done with nameserver or database */ |
| 120 | |
| 121 | struct utmp utmp; |
| 122 | |
| 123 | #define NUID 2048 |
| 124 | #define NMAX (sizeof (utmp.ut_name)) |
| 125 | |
| 126 | char names[NUID][NMAX+1]; |
| 127 | char outrangename[NMAX+1]; |
| 128 | int outrangeuid = -1; |
| 129 | |
| 130 | char * |
| 131 | getname(uid) |
| 132 | { |
| 133 | register struct passwd *pw; |
| 134 | static init; |
| 135 | struct passwd *getpwent(); |
| 136 | |
| 137 | if (uid >= 0 && uid < NUID && names[uid][0]) |
| 138 | return (&names[uid][0]); |
| 139 | if (uid >= 0 && uid == outrangeuid) |
| 140 | return (outrangename); |
| 141 | if (init == 2) { |
| 142 | if (uid < NUID) |
| 143 | return (0); |
| 144 | setpwent(); |
| 145 | while (pw = getpwent()) { |
| 146 | if (pw->pw_uid != uid) |
| 147 | continue; |
| 148 | outrangeuid = pw->pw_uid; |
| 149 | strncpy(outrangename, pw->pw_name, NMAX); |
| 150 | endpwent(); |
| 151 | return (outrangename); |
| 152 | } |
| 153 | endpwent(); |
| 154 | return (0); |
| 155 | } |
| 156 | if (init == 0) |
| 157 | setpwent(), init = 1; |
| 158 | while (pw = getpwent()) { |
| 159 | if (pw->pw_uid < 0 || pw->pw_uid >= NUID) { |
| 160 | if (pw->pw_uid == uid) { |
| 161 | outrangeuid = pw->pw_uid; |
| 162 | strncpy(outrangename, pw->pw_name, NMAX); |
| 163 | return (outrangename); |
| 164 | } |
| 165 | continue; |
| 166 | } |
| 167 | if (names[pw->pw_uid][0]) |
| 168 | continue; |
| 169 | strncpy(names[pw->pw_uid], pw->pw_name, NMAX); |
| 170 | if (pw->pw_uid == uid) |
| 171 | return (&names[uid][0]); |
| 172 | } |
| 173 | init = 2; |
| 174 | endpwent(); |
| 175 | return (0); |
| 176 | } |
| 177 | |
| 178 | #include <sys/dir.h> |
| 179 | |
| 180 | #define N_DEVS 43 /* hash value for device names */ |
| 181 | #define NDEVS 500 /* max number of file names in /dev */ |
| 182 | |
| 183 | struct devhash { |
| 184 | dev_t dev_dev; |
| 185 | char dev_name [fldsiz(utmp, ut_line) + 1]; |
| 186 | struct devhash * dev_nxt; |
| 187 | }; |
| 188 | struct devhash *dev_hash[N_DEVS]; |
| 189 | struct devhash *dev_chain; |
| 190 | #define HASH(d) (((int) d) % N_DEVS) |
| 191 | |
| 192 | setupdevs() |
| 193 | { |
| 194 | register DIR * fd; |
| 195 | register struct devhash * hashtab; |
| 196 | register ndevs = NDEVS; |
| 197 | struct direct * dp; |
| 198 | |
| 199 | if ((fd = opendir("/dev")) == NULL) { |
| 200 | perror("/dev"); |
| 201 | return; |
| 202 | } |
| 203 | hashtab = (struct devhash *)malloc(NDEVS * sizeof(struct devhash)); |
| 204 | if (hashtab == (struct devhash *)0) { |
| 205 | fprintf(stderr, "No mem for dev table\n"); |
| 206 | closedir(fd); |
| 207 | return; |
| 208 | } |
| 209 | while (dp = readdir(fd)) { |
| 210 | if (dp->d_ino == 0) |
| 211 | continue; |
| 212 | if (dp->d_name[0] != 't' && strcmp(dp->d_name, "console")) |
| 213 | continue; |
| 214 | strncpy(hashtab->dev_name, dp->d_name, fldsiz(utmp, ut_line)); |
| 215 | hashtab->dev_name[fldsiz(utmp, ut_line)] = 0; |
| 216 | hashtab->dev_nxt = dev_chain; |
| 217 | dev_chain = hashtab; |
| 218 | hashtab++; |
| 219 | if (--ndevs <= 0) |
| 220 | break; |
| 221 | } |
| 222 | closedir(fd); |
| 223 | } |
| 224 | |
| 225 | char * |
| 226 | getdev(dev) |
| 227 | dev_t dev; |
| 228 | { |
| 229 | register struct devhash *hp, *nhp; |
| 230 | struct stat statb; |
| 231 | char name[fldsiz(devhash, dev_name) + 6]; |
| 232 | static dev_t lastdev = (dev_t) -1; |
| 233 | static char *lastname; |
| 234 | static int init = 0; |
| 235 | |
| 236 | if (dev == NODEV) |
| 237 | return ("__"); |
| 238 | if (dev == lastdev) |
| 239 | return (lastname); |
| 240 | if (!init) { |
| 241 | setupdevs(); |
| 242 | init++; |
| 243 | } |
| 244 | for (hp = dev_hash[HASH(dev)]; hp; hp = hp->dev_nxt) |
| 245 | if (hp->dev_dev == dev) { |
| 246 | lastdev = dev; |
| 247 | return (lastname = hp->dev_name); |
| 248 | } |
| 249 | for (hp = dev_chain; hp; hp = nhp) { |
| 250 | nhp = hp->dev_nxt; |
| 251 | strcpy(name, "/dev/"); |
| 252 | strcat(name, hp->dev_name); |
| 253 | if (stat(name, &statb) < 0) /* name truncated usually */ |
| 254 | continue; |
| 255 | if ((statb.st_mode & S_IFMT) != S_IFCHR) |
| 256 | continue; |
| 257 | hp->dev_dev = statb.st_rdev; |
| 258 | hp->dev_nxt = dev_hash[HASH(hp->dev_dev)]; |
| 259 | dev_hash[HASH(hp->dev_dev)] = hp; |
| 260 | if (hp->dev_dev == dev) { |
| 261 | dev_chain = nhp; |
| 262 | lastdev = dev; |
| 263 | return (lastname = hp->dev_name); |
| 264 | } |
| 265 | } |
| 266 | dev_chain = (struct devhash *) 0; |
| 267 | return ("??"); |
| 268 | } |