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use stdio rather than stupid, ill-conceived buffering hack.

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cgd 1994-03-23 04:37:40 +00:00
parent 1f6f4700ad
commit 1feda9dc52
1 changed files with 63 additions and 47 deletions
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110
usr.bin/lastcomm/lastcomm.c
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@ -39,7 +39,7 @@ char copyright[] =
#ifndef lint
/*static char sccsid[] = "from: @(#)lastcomm.c 5.11 (Berkeley) 6/1/90";*/
static char rcsid[] = "$Id: lastcomm.c,v 1.4 1993/12/04 01:57:10 jtc Exp $";
static char rcsid[] = "$Id: lastcomm.c,v 1.5 1994/03/23 04:37:40 cgd Exp $";
#endif /* not lint */
/*
@ -56,24 +56,24 @@ static char rcsid[] = "$Id: lastcomm.c,v 1.4 1993/12/04 01:57:10 jtc Exp $";
#include <stdlib.h>
#include "pathnames.h"
struct acct buf[DEV_BSIZE / sizeof (struct acct)];
time_t expand();
char *flagbits();
char *getdev();
extern char *user_from_uid __P((unsigned long, int));
main(argc, argv)
int argc;
char *argv[];
{
extern int optind;
extern char *optarg;
register struct acct *acp;
register int bn, cc;
register char *p;
struct acct ab;
struct stat sb;
int ch, fd;
char *acctfile, *ctime(), *strcpy(), *user_from_uid();
long lseek();
FILE *fp;
off_t size;
time_t x;
int ch;
char *acctfile;
acctfile = _PATH_ACCT;
while ((ch = getopt(argc, argv, "f:")) != EOF)
@ -88,43 +88,59 @@ main(argc, argv)
}
argv += optind;
fd = open(acctfile, O_RDONLY);
if (fd < 0) {
perror(acctfile);
exit(1);
}
(void)fstat(fd, &sb);
setpassent(1);
for (bn = btodb(sb.st_size); bn >= 0; bn--) {
(void)lseek(fd, (off_t)dbtob(bn), L_SET);
cc = read(fd, buf, DEV_BSIZE);
if (cc < 0) {
perror("read");
break;
}
acp = buf + (cc / sizeof (buf[0])) - 1;
for (; acp >= buf; acp--) {
register char *cp;
time_t x;
/* Open the file. */
if ((fp = fopen(acctfile, "r")) == NULL || fstat(fileno(fp), &sb))
err(1, "%s", acctfile);
if (acp->ac_comm[0] == '\0')
(void)strcpy(acp->ac_comm, "?");
for (cp = &acp->ac_comm[0];
cp < &acp->ac_comm[fldsiz(acct, ac_comm)] && *cp;
cp++)
if (!isascii(*cp) || iscntrl(*cp))
*cp = '?';
if (*argv && !ok(argv, acp))
continue;
x = expand(acp->ac_utime) + expand(acp->ac_stime);
printf("%-*.*s %s %-*s %-*s %6.2f secs %.16s\n",
fldsiz(acct, ac_comm), fldsiz(acct, ac_comm),
acp->ac_comm, flagbits(acp->ac_flag),
UT_NAMESIZE, user_from_uid(acp->ac_uid, 0),
UT_LINESIZE, getdev(acp->ac_tty),
x / (double)AHZ, ctime(&acp->ac_btime));
}
/*
* 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 && !ok(argv, &ab))
continue;
x = expand(ab.ac_utime) + expand(ab.ac_stime);
printf("%-*.*s %s %-*s %-*s %6.2f secs %.16s\n",
fldsiz(acct, ac_comm), 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),
x / (double)AHZ, ctime(&ab.ac_btime));
}
exit(0);
}
time_t
@ -164,7 +180,6 @@ ok(argv, acp)
register struct acct *acp;
{
register char *cp;
char *user_from_uid();
do {
cp = user_from_uid(acp->ac_uid, 0);
@ -212,7 +227,8 @@ setupdevs()
while (dp = readdir(fd)) {
if (dp->d_ino == 0)
continue;
if (dp->d_name[0] != 't' && /* XXX (cgd) followin is a hack! */
if (dp->d_name[0] != 't' &&
#warning WARNING! ugly pc 'vga' console hack!
(strcmp(dp->d_name, "console") && strcmp(dp->d_name, "vga")))
continue;
(void)strncpy(hashtab->dev_name, dp->d_name, UT_LINESIZE);