Split up the big wtmp() function to avoid long lines and code
duplication.
This commit is contained in:
Ian Dowse
parent
4d307e631d
commit
6e3a7c4b1b
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=91536
@ -84,6 +84,7 @@ struct ttytab {
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LIST_ENTRY(ttytab) list;
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};
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static const char *crmsg; /* cause of last reboot */
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static long currentout, /* current logout value */
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maxrec; /* records to display */
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static const char *file = _PATH_WTMP; /* wtmp file */
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@ -97,8 +98,10 @@ static time_t snaptime; /* if != 0, we will only
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void addarg __P((int, char *));
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time_t dateconv __P((char *));
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void doentry __P((struct utmp *));
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void hostconv __P((char *));
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void onintr __P((int));
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void printentry __P((struct utmp *, struct ttytab *));
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char *ttyconv __P((char *));
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int want __P((struct utmp *));
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void usage __P((void));
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@ -193,15 +196,11 @@ void
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wtmp()
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{
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struct utmp *bp; /* current structure */
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struct ttytab *tt, *ttx; /* ttylist entry */
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struct stat stb; /* stat of file for size */
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long bl;
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time_t delta; /* time difference */
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int bytes, wfd;
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const char *crmsg;
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char ct[80];
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struct tm *tm;
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int snapfound = 0; /* found snapshot entry? */
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time_t t;
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LIST_INIT(&ttylist);
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@ -219,152 +218,8 @@ wtmp()
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if (lseek(wfd, (off_t)(bl * sizeof(buf)), L_SET) == -1 ||
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(bytes = read(wfd, buf, sizeof(buf))) == -1)
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err(1, "%s", file);
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for (bp = &buf[bytes / sizeof(buf[0]) - 1]; bp >= buf; --bp) {
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/*
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* if the terminal line is '~', the machine stopped.
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* see utmp(5) for more info.
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*/
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if (bp->ut_line[0] == '~' && !bp->ut_line[1]) {
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/* everybody just logged out */
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for (tt = LIST_FIRST(&ttylist); tt;) {
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LIST_REMOVE(tt, list);
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ttx = tt;
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tt = LIST_NEXT(tt, list);
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free(ttx);
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}
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currentout = -bp->ut_time;
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crmsg = strncmp(bp->ut_name, "shutdown",
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UT_NAMESIZE) ? "crash" : "shutdown";
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/*
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* if we're in snapshot mode, we want to
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* exit if this shutdown/reboot appears
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* while we we are tracking the active
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* range
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*/
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if (snaptime && snapfound)
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return;
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/*
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* don't print shutdown/reboot entries
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* unless flagged for
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*/
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if (!snaptime && want(bp)) {
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t = _int_to_time(bp->ut_time);
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tm = localtime(&t);
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(void) strftime(ct, sizeof(ct),
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d_first ? "%a %e %b %R" :
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"%a %b %e %R",
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tm);
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printf("%-*.*s %-*.*s %-*.*s %s\n",
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UT_NAMESIZE, UT_NAMESIZE,
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bp->ut_name, UT_LINESIZE,
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UT_LINESIZE, bp->ut_line,
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UT_HOSTSIZE, UT_HOSTSIZE,
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bp->ut_host, ct);
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if (maxrec != -1 && !--maxrec)
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return;
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}
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continue;
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}
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/*
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* if the line is '{' or '|', date got set; see
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* utmp(5) for more info.
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*/
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if ((bp->ut_line[0] == '{' || bp->ut_line[0] == '|')
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&& !bp->ut_line[1]) {
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if (want(bp) && !snaptime) {
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t = _int_to_time(bp->ut_time);
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tm = localtime(&t);
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(void) strftime(ct, sizeof(ct),
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d_first ? "%a %e %b %R" :
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"%a %b %e %R",
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tm);
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printf("%-*.*s %-*.*s %-*.*s %s\n",
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UT_NAMESIZE, UT_NAMESIZE, bp->ut_name,
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UT_LINESIZE, UT_LINESIZE, bp->ut_line,
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UT_HOSTSIZE, UT_HOSTSIZE, bp->ut_host,
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ct);
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if (maxrec && !--maxrec)
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return;
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}
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continue;
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}
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/* find associated tty */
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LIST_FOREACH(tt, &ttylist, list)
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if (!strncmp(tt->tty, bp->ut_line, UT_LINESIZE))
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break;
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if (tt == NULL) {
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/* add new one */
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tt = malloc(sizeof(struct ttytab));
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if (tt == NULL)
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err(1, "malloc failure");
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tt->logout = currentout;
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strncpy(tt->tty, bp->ut_line, UT_LINESIZE);
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LIST_INSERT_HEAD(&ttylist, tt, list);
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}
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/*
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* print record if not in snapshot mode and wanted
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* or in snapshot mode and in snapshot range
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*/
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if (bp->ut_name[0] && (want(bp) ||
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(bp->ut_time < snaptime &&
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(tt->logout > snaptime || tt->logout < 1)))) {
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snapfound = 1;
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/*
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* when uucp and ftp log in over a network, the entry in
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* the utmp file is the name plus their process id. See
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* etc/ftpd.c and usr.bin/uucp/uucpd.c for more information.
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*/
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if (!strncmp(bp->ut_line, "ftp", sizeof("ftp") - 1))
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bp->ut_line[3] = '\0';
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else if (!strncmp(bp->ut_line, "uucp", sizeof("uucp") - 1))
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bp->ut_line[4] = '\0';
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t = _int_to_time(bp->ut_time);
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tm = localtime(&t);
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(void) strftime(ct, sizeof(ct),
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d_first ? "%a %e %b %R" :
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"%a %b %e %R",
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tm);
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printf("%-*.*s %-*.*s %-*.*s %s ",
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UT_NAMESIZE, UT_NAMESIZE, bp->ut_name,
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UT_LINESIZE, UT_LINESIZE, bp->ut_line,
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UT_HOSTSIZE, UT_HOSTSIZE, bp->ut_host,
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ct);
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if (!tt->logout)
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puts(" still logged in");
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else {
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if (tt->logout < 0) {
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tt->logout = -tt->logout;
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printf("- %s", crmsg);
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}
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else {
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tm = localtime(&tt->logout);
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(void) strftime(ct, sizeof(ct), "%R", tm);
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printf("- %s", ct);
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}
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delta = tt->logout - bp->ut_time;
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if ( sflag ) {
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printf(" (%8ld)\n",
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(long)delta);
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} else {
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tm = gmtime(&delta);
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(void) strftime(ct, sizeof(ct),
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width >= 8 ? "%T" : "%R",
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tm);
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if (delta < 86400)
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printf(" (%s)\n", ct);
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else
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printf(" (%ld+%s)\n",
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(long)delta /
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86400, ct);
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}
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}
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if (maxrec != -1 && !--maxrec)
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return;
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}
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tt->logout = bp->ut_time;
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}
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for (bp = &buf[bytes / sizeof(buf[0]) - 1]; bp >= buf; --bp)
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doentry(bp);
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}
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t = _int_to_time(buf[0].ut_time);
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tm = localtime(&t);
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@ -372,6 +227,153 @@ wtmp()
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printf("%s", ct);
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}
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/*
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* doentry --
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* process a single wtmp entry
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*/
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void
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doentry(bp)
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struct utmp *bp;
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{
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struct ttytab *tt, *ttx; /* ttylist entry */
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int snapfound = 0; /* found snapshot entry? */
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/*
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* if the terminal line is '~', the machine stopped.
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* see utmp(5) for more info.
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*/
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if (bp->ut_line[0] == '~' && !bp->ut_line[1]) {
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/* everybody just logged out */
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for (tt = LIST_FIRST(&ttylist); tt;) {
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LIST_REMOVE(tt, list);
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ttx = tt;
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tt = LIST_NEXT(tt, list);
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free(ttx);
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}
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currentout = -bp->ut_time;
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crmsg = strncmp(bp->ut_name, "shutdown", UT_NAMESIZE) ?
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"crash" : "shutdown";
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/*
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* if we're in snapshot mode, we want to exit if this
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* shutdown/reboot appears while we we are tracking the
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* active range
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*/
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if (snaptime && snapfound)
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exit(0);
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/*
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* don't print shutdown/reboot entries unless flagged for
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*/
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if (!snaptime && want(bp)) {
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printentry(bp, NULL);
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if (maxrec != -1 && !--maxrec)
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exit(0);
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}
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return;
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}
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/*
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* if the line is '{' or '|', date got set; see
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* utmp(5) for more info.
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*/
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if ((bp->ut_line[0] == '{' || bp->ut_line[0] == '|') &&
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!bp->ut_line[1]) {
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if (want(bp) && !snaptime) {
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printentry(bp, NULL);
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if (maxrec && !--maxrec)
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exit(0);
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}
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return;
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}
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/* find associated tty */
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LIST_FOREACH(tt, &ttylist, list)
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if (!strncmp(tt->tty, bp->ut_line, UT_LINESIZE))
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break;
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if (tt == NULL) {
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/* add new one */
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tt = malloc(sizeof(struct ttytab));
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if (tt == NULL)
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err(1, "malloc failure");
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tt->logout = currentout;
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strncpy(tt->tty, bp->ut_line, UT_LINESIZE);
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LIST_INSERT_HEAD(&ttylist, tt, list);
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}
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/*
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* print record if not in snapshot mode and wanted
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* or in snapshot mode and in snapshot range
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*/
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if (bp->ut_name[0] && (want(bp) || (bp->ut_time < snaptime &&
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(tt->logout > snaptime || tt->logout < 1)))) {
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snapfound = 1;
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/*
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* when uucp and ftp log in over a network, the entry in
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* the utmp file is the name plus their process id. See
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* etc/ftpd.c and usr.bin/uucp/uucpd.c for more information.
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*/
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if (!strncmp(bp->ut_line, "ftp", sizeof("ftp") - 1))
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bp->ut_line[3] = '\0';
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else if (!strncmp(bp->ut_line, "uucp", sizeof("uucp") - 1))
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bp->ut_line[4] = '\0';
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printentry(bp, tt);
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if (maxrec != -1 && !--maxrec)
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return;
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}
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tt->logout = bp->ut_time;
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}
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/*
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* printentry --
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* output an entry
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*
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* If `tt' is non-NULL, use it and `crmsg' to print the logout time or
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* logout type (crash/shutdown) as appropriate.
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*/
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void
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printentry(bp, tt)
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struct utmp *bp;
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struct ttytab *tt;
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{
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char ct[80];
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struct tm *tm;
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time_t delta; /* time difference */
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time_t t;
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t = _int_to_time(bp->ut_time);
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tm = localtime(&t);
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(void) strftime(ct, sizeof(ct), d_first ? "%a %e %b %R" :
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"%a %b %e %R", tm);
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printf("%-*.*s %-*.*s %-*.*s %s%c",
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UT_NAMESIZE, UT_NAMESIZE, bp->ut_name,
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UT_LINESIZE, UT_LINESIZE, bp->ut_line,
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UT_HOSTSIZE, UT_HOSTSIZE, bp->ut_host,
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ct, tt == NULL ? '\n' : ' ');
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if (tt == NULL)
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return;
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if (!tt->logout) {
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puts(" still logged in");
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return;
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}
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if (tt->logout < 0) {
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tt->logout = -tt->logout;
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printf("- %s", crmsg);
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} else {
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tm = localtime(&tt->logout);
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(void) strftime(ct, sizeof(ct), "%R", tm);
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printf("- %s", ct);
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}
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delta = tt->logout - bp->ut_time;
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if (sflag) {
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printf(" (%8ld)\n", (long)delta);
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} else {
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tm = gmtime(&delta);
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(void) strftime(ct, sizeof(ct), width >= 8 ? "%T" : "%R", tm);
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if (delta < 86400)
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printf(" (%s)\n", ct);
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else
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printf(" (%ld+%s)\n", (long)delta / 86400, ct);
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}
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}
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/*
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* want --
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* see if want this entry
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@ -402,7 +404,7 @@ want(bp)
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if (!strncmp(step->name, bp->ut_name, UT_NAMESIZE))
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return (YES);
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break;
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}
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}
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return (NO);
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}
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