| File: | src/usr.bin/lastcomm/lastcomm.c |
| Warning: | line 84, column 2 Value stored to 'argc' is never read |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
| 1 | /* $OpenBSD: lastcomm.c,v 1.30 2021/12/13 16:37:37 deraadt Exp $ */ |
| 2 | /* $NetBSD: lastcomm.c,v 1.9 1995/10/22 01:43:42 ghudson Exp $ */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (c) 1980, 1993 |
| 6 | * The Regents of the University of California. All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the name of the University nor the names of its contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 | * SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | #include <sys/types.h> |
| 34 | #include <sys/stat.h> |
| 35 | #include <sys/acct.h> |
| 36 | |
| 37 | #include <ctype.h> |
| 38 | #include <err.h> |
| 39 | #include <fcntl.h> |
| 40 | #include <math.h> |
| 41 | #include <stdio.h> |
| 42 | #include <stdlib.h> |
| 43 | #include <string.h> |
| 44 | #include <unistd.h> |
| 45 | #include <utmp.h> |
| 46 | #include <pwd.h> |
| 47 | #include "pathnames.h" |
| 48 | |
| 49 | time_t expand(u_int); |
| 50 | char *flagbits(int); |
| 51 | char *getdev(dev_t); |
| 52 | int requested(char *[], struct acct *); |
| 53 | void usage(void); |
| 54 | |
| 55 | #define SECSPERMIN(60) (60) |
| 56 | #define SECSPERHOUR(60 * 60) (60 * 60) |
| 57 | |
| 58 | int |
| 59 | main(int argc, char *argv[]) |
| 60 | { |
| 61 | char *p; |
| 62 | struct acct ab; |
| 63 | struct stat sb; |
| 64 | FILE *fp; |
| 65 | off_t size; |
| 66 | time_t t; |
| 67 | double delta; |
| 68 | int ch; |
| 69 | char *acctfile; |
| 70 | |
| 71 | if (pledge("stdio rpath getpw", NULL((void *)0)) == -1) |
| 72 | err(1, "pledge"); |
| 73 | |
| 74 | acctfile = _PATH_ACCT"/var/account/acct"; |
| 75 | while ((ch = getopt(argc, argv, "f:")) != -1) |
| 76 | switch(ch) { |
| 77 | case 'f': |
| 78 | acctfile = optarg; |
| 79 | break; |
| 80 | case '?': |
| 81 | default: |
| 82 | usage(); |
| 83 | } |
| 84 | argc -= optind; |
Value stored to 'argc' is never read | |
| 85 | argv += optind; |
| 86 | |
| 87 | /* Open the file. */ |
| 88 | if ((fp = fopen(acctfile, "r")) == NULL((void *)0) || fstat(fileno(fp)(!__isthreaded ? ((fp)->_file) : (fileno)(fp)), &sb)) |
| 89 | err(1, "%s", acctfile); |
| 90 | |
| 91 | /* |
| 92 | * Round off to integral number of accounting records, probably |
| 93 | * not necessary, but it doesn't hurt. |
| 94 | */ |
| 95 | size = sb.st_size - sb.st_size % sizeof(struct acct); |
| 96 | |
| 97 | /* Check if any records to display. */ |
| 98 | if (size < sizeof(struct acct)) |
| 99 | exit(0); |
| 100 | |
| 101 | /* |
| 102 | * Seek to before the last entry in the file; use lseek(2) in case |
| 103 | * the file is bigger than a "long". |
| 104 | */ |
| 105 | size -= sizeof(struct acct); |
| 106 | if (lseek(fileno(fp)(!__isthreaded ? ((fp)->_file) : (fileno)(fp)), size, SEEK_SET0) == -1) |
| 107 | err(1, "%s", acctfile); |
| 108 | |
| 109 | for (;;) { |
| 110 | if (fread(&ab, sizeof(struct acct), 1, fp) != 1) |
| 111 | err(1, "%s", acctfile); |
| 112 | |
| 113 | if (ab.ac_comm[0] == '\0') { |
| 114 | ab.ac_comm[0] = '?'; |
| 115 | ab.ac_comm[1] = '\0'; |
| 116 | } else |
| 117 | for (p = &ab.ac_comm[0]; |
| 118 | p < &ab.ac_comm[sizeof ab.ac_comm] && *p; ++p) |
| 119 | if (!isprint((unsigned char)*p)) |
| 120 | *p = '?'; |
| 121 | if (!*argv || requested(argv, &ab)) { |
| 122 | t = expand(ab.ac_utime) + expand(ab.ac_stime); |
| 123 | (void)printf("%-*.*s %-7s %-*.*s %-*.*s %6.2f secs %.16s", |
| 124 | (int)sizeof ab.ac_comm, |
| 125 | (int)sizeof ab.ac_comm, |
| 126 | ab.ac_comm, flagbits(ab.ac_flag), UT_NAMESIZE32, |
| 127 | UT_NAMESIZE32, user_from_uid(ab.ac_uid, 0), |
| 128 | UT_LINESIZE8, UT_LINESIZE8, getdev(ab.ac_tty), |
| 129 | t / (double)AHZ64, ctime(&ab.ac_btime)); |
| 130 | delta = expand(ab.ac_etime) / (double)AHZ64; |
| 131 | printf(" (%1.0f:%02.0f:%05.2f)\n", |
| 132 | delta / SECSPERHOUR(60 * 60), |
| 133 | fmod(delta, (double)SECSPERHOUR(60 * 60)) / SECSPERMIN(60), |
| 134 | fmod(delta, (double)SECSPERMIN(60))); |
| 135 | } |
| 136 | |
| 137 | if (size == 0) |
| 138 | break; |
| 139 | /* seek to previous entry */ |
| 140 | if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR1) == -1) |
| 141 | err(1, "%s", acctfile); |
| 142 | size -= sizeof(struct acct); |
| 143 | } |
| 144 | exit(0); |
| 145 | } |
| 146 | |
| 147 | time_t |
| 148 | expand(u_int t) |
| 149 | { |
| 150 | time_t nt; |
| 151 | |
| 152 | nt = t & 017777; |
| 153 | t >>= 13; |
| 154 | while (t) { |
| 155 | t--; |
| 156 | nt <<= 3; |
| 157 | } |
| 158 | return (nt); |
| 159 | } |
| 160 | |
| 161 | char * |
| 162 | flagbits(int f) |
| 163 | { |
| 164 | static char flags[20] = "-"; |
| 165 | char *p; |
| 166 | |
| 167 | #define BIT(flag, ch)if (f & flag) *p++ = ch if (f & flag) *p++ = ch |
| 168 | |
| 169 | p = flags + 1; |
| 170 | BIT(AFORK, 'F')if (f & 0x01) *p++ = 'F'; |
| 171 | BIT(AMAP, 'M')if (f & 0x04) *p++ = 'M'; |
| 172 | BIT(ACORE, 'D')if (f & 0x08) *p++ = 'D'; |
| 173 | BIT(AXSIG, 'X')if (f & 0x10) *p++ = 'X'; |
| 174 | BIT(APLEDGE, 'P')if (f & 0x20) *p++ = 'P'; |
| 175 | BIT(ATRAP, 'T')if (f & 0x40) *p++ = 'T'; |
| 176 | BIT(AUNVEIL, 'U')if (f & 0x80) *p++ = 'U'; |
| 177 | *p = '\0'; |
| 178 | return (flags); |
| 179 | } |
| 180 | |
| 181 | int |
| 182 | requested(char *argv[], struct acct *acp) |
| 183 | { |
| 184 | do { |
| 185 | if (!strcmp(user_from_uid(acp->ac_uid, 0), *argv)) |
| 186 | return (1); |
| 187 | if (!strcmp(getdev(acp->ac_tty), *argv)) |
| 188 | return (1); |
| 189 | if (!strncmp(acp->ac_comm, *argv, sizeof acp->ac_comm)) |
| 190 | return (1); |
| 191 | } while (*++argv); |
| 192 | return (0); |
| 193 | } |
| 194 | |
| 195 | char * |
| 196 | getdev(dev_t dev) |
| 197 | { |
| 198 | static dev_t lastdev = (dev_t)-1; |
| 199 | static char *lastname; |
| 200 | |
| 201 | if (dev == -1) /* Special case. */ |
| 202 | return ("__"); |
| 203 | if (dev == lastdev) /* One-element cache. */ |
| 204 | return (lastname); |
| 205 | lastdev = dev; |
| 206 | if ((lastname = devname(dev, S_IFCHR0020000)) == NULL((void *)0)) |
| 207 | lastname = "??"; |
| 208 | return (lastname); |
| 209 | } |
| 210 | |
| 211 | void |
| 212 | usage(void) |
| 213 | { |
| 214 | (void)fprintf(stderr(&__sF[2]), |
| 215 | "usage: lastcomm [-f file] [command ...] [user ...] [terminal ...]\n"); |
| 216 | exit(1); |
| 217 | } |