diff options
Diffstat (limited to 'usr.bin/lastcomm/lastcomm.c')
-rw-r--r-- | usr.bin/lastcomm/lastcomm.c | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/usr.bin/lastcomm/lastcomm.c b/usr.bin/lastcomm/lastcomm.c new file mode 100644 index 0000000..7c3c363 --- /dev/null +++ b/usr.bin/lastcomm/lastcomm.c @@ -0,0 +1,222 @@ +/* + * Copyright (c) 1980, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char copyright[] = +"@(#) Copyright (c) 1980, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +static char sccsid[] = "@(#)lastcomm.c 8.1 (Berkeley) 6/6/93"; +#endif /* not lint */ + +#include <sys/param.h> +#include <sys/stat.h> +#include <sys/acct.h> + +#include <ctype.h> +#include <err.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <struct.h> +#include <unistd.h> +#include <utmp.h> +#include "pathnames.h" + +time_t expand __P((u_int)); +char *flagbits __P((int)); +char *getdev __P((dev_t)); +int requested __P((char *[], struct acct *)); +void usage __P((void)); +char *user_from_uid(); + +int +main(argc, argv) + int argc; + char *argv[]; +{ + register char *p; + struct acct ab; + struct stat sb; + FILE *fp; + off_t size; + time_t t; + int ch; + char *acctfile; + + acctfile = _PATH_ACCT; + while ((ch = getopt(argc, argv, "f:")) != EOF) + switch((char)ch) { + case 'f': + acctfile = optarg; + break; + case '?': + default: + usage(); + } + argc -= optind; + argv += optind; + + /* Open the file. */ + if ((fp = fopen(acctfile, "r")) == NULL || fstat(fileno(fp), &sb)) + err(1, "%s", acctfile); + + /* + * Round off to integral number of accounting records, probably + * not necessary, but it doesn't hurt. + */ + size = sb.st_size - sb.st_size % sizeof(struct acct); + + /* Check if any records to display. */ + if (size < sizeof(struct acct)) + exit(0); + + /* + * Seek to before the last entry in the file; use lseek(2) in case + * the file is bigger than a "long". + */ + size -= sizeof(struct acct); + if (lseek(fileno(fp), size, SEEK_SET) == -1) + err(1, "%s", acctfile); + + for (;;) { + if (fread(&ab, sizeof(struct acct), 1, fp) != 1) + err(1, "%s", acctfile); + + if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1) + err(1, "%s", acctfile); + + if (size == 0) + break; + size -= sizeof(struct acct); + + if (ab.ac_comm[0] == '\0') { + ab.ac_comm[0] = '?'; + ab.ac_comm[1] = '\0'; + } else + for (p = &ab.ac_comm[0]; + p < &ab.ac_comm[fldsiz(acct, ac_comm)] && *p; ++p) + if (!isprint(*p)) + *p = '?'; + if (*argv && !requested(argv, &ab)) + continue; + + t = expand(ab.ac_utime) + expand(ab.ac_stime); + (void)printf("%-*s %-7s %-*s %-*s %6.2f secs %.16s\n", + fldsiz(acct, ac_comm), ab.ac_comm, flagbits(ab.ac_flag), + UT_NAMESIZE, user_from_uid(ab.ac_uid, 0), + UT_LINESIZE, getdev(ab.ac_tty), + t / (double)AHZ, ctime(&ab.ac_btime)); + } + exit(0); +} + +time_t +expand(t) + u_int t; +{ + register time_t nt; + + nt = t & 017777; + t >>= 13; + while (t) { + t--; + nt <<= 3; + } + return (nt); +} + +char * +flagbits(f) + register int f; +{ + static char flags[20] = "-"; + char *p; + +#define BIT(flag, ch) if (f & flag) *p++ = ch + + p = flags + 1; + BIT(ASU, 'S'); + BIT(AFORK, 'F'); + BIT(ACOMPAT, 'C'); + BIT(ACORE, 'D'); + BIT(AXSIG, 'X'); + *p = '\0'; + return (flags); +} + +int +requested(argv, acp) + register char *argv[]; + register struct acct *acp; +{ + register char *p; + + do { + p = user_from_uid(acp->ac_uid, 0); + if (!strcmp(p, *argv)) + return (1); + if ((p = getdev(acp->ac_tty)) && !strcmp(p, *argv)) + return (1); + if (!strncmp(acp->ac_comm, *argv, fldsiz(acct, ac_comm))) + return (1); + } while (*++argv); + return (0); +} + +char * +getdev(dev) + dev_t dev; +{ + static dev_t lastdev = (dev_t)-1; + static char *lastname; + + if (dev == NODEV) /* Special case. */ + return ("__"); + if (dev == lastdev) /* One-element cache. */ + return (lastname); + lastdev = dev; + lastname = devname(dev, S_IFCHR); + return (lastname); +} + +void +usage() +{ + (void)fprintf(stderr, + "lastcomm [ -f file ] [command ...] [user ...] [tty ...]\n"); + exit(1); +} |