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- /*
- * Copyright (c) 1980 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted provided
- * that: (1) source distributions retain this entire copyright notice and
- * comment, and (2) distributions including binaries display the following
- * acknowledgement: ``This product includes software developed by the
- * University of California, Berkeley and its contributors'' in the
- * documentation or other materials provided with the distribution and in
- * all advertising materials mentioning features or use of this software.
- * 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- #ifndef lint
- char copyright[] =
- "@(#) Copyright (c) 1980 Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)sysline.c 5.16 (Berkeley) 6/24/90";
- #endif /* not lint */
-
- /*
- * sysline - system status display on 25th line of terminal
- * j.k.foderaro
- *
- * Prints a variety of information on the special status line of terminals
- * that have a status display capability. Cursor motions, status commands,
- * etc. are gleamed from /etc/termcap.
- * By default, all information is printed, and flags are given on the command
- * line to disable the printing of information. The information and
- * disabling flags are:
- *
- * flag what
- * ----- ----
- * time of day
- * load average and change in load average in the last 5 mins
- * number of user logged on
- * -p # of processes the users owns which are runnable and the
- * number which are suspended. Processes whose parent is 1
- * are not counted.
- * -l users who've logged on and off.
- * -m summarize new mail which has arrived
- *
- * <other flags>
- * -r use non reverse video
- * -c turn off 25th line for 5 seconds before redisplaying.
- * -b beep once one the half hour, twice on the hour
- * +N refresh display every N seconds.
- * -i print pid first thing
- * -e do simple print designed for an emacs buffer line
- * -w do the right things for a window
- * -h print hostname between time and load average
- * -D print day/date before time of day
- * -d debug mode - print status line data in human readable format
- * -q quiet mode - don't output diagnostic messages
- * -s print Short (left-justified) line if escapes not allowed
- * -j Print left Justified line regardless
- */
-
- #define BSD4_2 /* for 4.2 BSD */
- #define WHO /* turn this on always */
- #define HOSTNAME /* 4.1a or greater, with hostname() */
- #define RWHO /* 4.1a or greater, with rwho */
- #define VMUNIX /* turn this on if you are running on vmunix */
- #define NEW_BOOTTIME /* 4.1c or greater */
-
- #define NETPREFIX "ucb"
- #define DEFDELAY 60 /* update status once per minute */
- /*
- * if MAXLOAD is defined, then if the load average exceeded MAXLOAD
- * then the process table will not be scanned and the log in/out data
- * will not be checked. The purpose of this is to reduced the load
- * on the system when it is loaded.
- */
- #define MAXLOAD 6.0
-
- #include <stdio.h>
- #include <sys/param.h>
- #include <sys/types.h>
- #include <sys/signal.h>
- #include <utmp.h>
- #include <ctype.h>
- #ifndef BSD4_2
- #include <unctrl.h>
- #endif
- #include <sys/time.h>
- #include <sys/stat.h>
- #ifdef VMUNIX
- #include <nlist.h>
- #include <sys/vtimes.h>
- #include <sys/proc.h>
- #endif
- #ifdef pdp11
- #include <a.out.h>
- #include <sys/proc.h>
- #endif
- #include <curses.h>
- #undef nl
- #ifdef TERMINFO
- #include <term.h>
- #endif TERMINFO
-
- #ifdef RWHO
- #include <protocols/rwhod.h>
-
- #define DOWN_THRESHOLD (11 * 60)
-
- struct remotehost {
- char *rh_host;
- int rh_file;
- } remotehost[10];
- int nremotes = 0;
- #endif RWHO
-
- #include "pathnames.h"
-
- struct nlist nl[] = {
- #ifdef NEW_BOOTTIME
- { "_boottime" }, /* After 4.1a the label changed to "boottime" */
- #else
- { "_bootime" }, /* Under 4.1a and earlier it is "bootime" */
- #endif
- #define NL_BOOT 0
- { "_proc" },
- #define NL_PROC 1
- #ifdef VMUNIX
- { "_nproc" },
- #define NL_NPROC 2
- #endif
- 0
- };
-
- /* stuff for the kernel */
- int kmem; /* file descriptor for _PATH_KMEM */
- struct proc *proc, *procNPROC;
- int nproc;
- int procadr;
- double avenrun[3]; /* used for storing load averages */
-
- /*
- * In order to determine how many people are logged on and who has
- * logged in or out, we read in the /etc/utmp file. We also keep track of
- * the previous utmp file.
- */
- int ut = -1; /* the file descriptor */
- struct utmp *new, *old;
- char *status; /* per tty status bits, see below */
- int nentries; /* number of utmp entries */
- /* string lengths for printing */
- #define LINESIZE (sizeof old->ut_line)
- #define NAMESIZE (sizeof old->ut_name)
- /*
- * Status codes to say what has happened to a particular entry in utmp.
- * NOCH means no change, ON means new person logged on,
- * OFF means person logged off.
- */
- #define NOCH 0
- #define ON 0x1
- #define OFF 0x2
-
- #ifdef WHO
- char whofilename[100];
- char whofilename2[100];
- #endif
-
- #ifdef HOSTNAME
- char hostname[MAXHOSTNAMELEN+1]; /* one more for null termination */
- #endif
-
- char lockfilename[100]; /* if exists, will prevent us from running */
-
- /* flags which determine which info is printed */
- int mailcheck = 1; /* m - do biff like checking of mail */
- int proccheck = 1; /* p - give information on processes */
- int logcheck = 1; /* l - tell who logs in and out */
- int hostprint = 0; /* h - print out hostname */
- int dateprint = 0; /* h - print out day/date */
- int quiet = 0; /* q - hush diagnostic messages */
-
- /* flags which determine how things are printed */
- int clr_bet_ref = 0; /* c - clear line between refeshes */
- int reverse = 1; /* r - use reverse video */
- int shortline = 0; /* s - short (left-justified) if escapes not allowed */
- int leftline = 0; /* j - left-justified even if escapes allowed */
-
- /* flags which have terminal do random things */
- int beep = 0; /* b - beep every half hour and twice every hour */
- int printid = 0; /* i - print pid of this process at startup */
- int synch = 1; /* synchronize with clock */
-
- /* select output device (status display or straight output) */
- int emacs = 0; /* e - assume status display */
- int window = 0; /* w - window mode */
- int dbug = 0; /* d - debug */
-
- /*
- * used to turn off reverse video every REVOFF times
- * in an attempt to not wear out the phospher.
- */
- #define REVOFF 5
- int revtime = 1;
-
- /* used by mail checker */
- off_t mailsize = 0;
- off_t linebeg = 0; /* place where we last left off reading */
-
- /* things used by the string routines */
- int chars; /* number of printable characters */
- char *sp;
- char strarr[512]; /* big enough now? */
- /* flags to stringdump() */
- char sawmail; /* remember mail was seen to print bells */
- char mustclear; /* status line messed up */
-
- /* strings which control status line display */
- #ifdef TERMINFO
- char *rev_out, *rev_end, *arrows;
- char *tparm();
- #else
- char to_status_line[64];
- char from_status_line[64];
- char dis_status_line[64];
- char clr_eol[64];
- char rev_out[20], rev_end[20];
- char *arrows, *bell = "\007";
- int eslok; /* escapes on status line okay (reverse, cursor addressing) */
- int hasws = 0; /* is "ws" explicitly defined? */
- int columns;
- #define tparm(cap, parm) tgoto((cap), 0, (parm))
- char *tgoto();
- #endif
-
- /* to deal with window size changes */
- #ifdef SIGWINCH
- int sigwinch();
- char winchanged; /* window size has changed since last update */
- #endif
-
- /* random globals */
- char *username;
- char *ourtty; /* keep track of what tty we're on */
- struct stat stbuf, mstbuf; /* mstbuf for mail check only */
- unsigned delay = DEFDELAY;
- uid_t uid;
- double loadavg = 0.0; /* current load average */
- int users = 0;
-
- char *getenv();
- char *ttyname();
- char *strcpy1();
- char *sysrup();
- char *calloc();
- char *malloc();
- int outc();
- int erroutc();
-
- main(argc,argv)
- register char **argv;
- {
- int clearbotl();
- register char *cp;
- char *home;
- extern char *index();
-
- #ifdef HOSTNAME
- gethostname(hostname, sizeof hostname - 1);
- if ((cp = index(hostname, '.')) != NULL)
- *cp = '\0';
- #endif
-
- for (argv++; *argv != 0; argv++)
- switch (**argv) {
- case '-':
- for (cp = *argv + 1; *cp; cp++) {
- switch(*cp) {
- case 'r' : /* turn off reverse video */
- reverse = 0;
- break;
- case 'c':
- clr_bet_ref = 1;
- break;
- case 'h':
- hostprint = 1;
- break;
- case 'D':
- dateprint = 1;
- break;
- #ifdef RWHO
- case 'H':
- if (argv[1] == 0)
- break;
- argv++;
- if (strcmp(hostname, *argv) &&
- strcmp(&hostname[sizeof NETPREFIX - 1], *argv))
- remotehost[nremotes++].rh_host = *argv;
- break;
- #endif RWHO
- case 'm':
- mailcheck = 0;
- break;
- case 'p':
- proccheck = 0;
- break;
- case 'l':
- logcheck = 0;
- break;
- case 'b':
- beep = 1;
- break;
- case 'i':
- printid = 1;
- break;
- case 'w':
- window = 1;
- break;
- case 'e':
- emacs = 1;
- break;
- case 'd':
- dbug = 1;
- break;
- case 'q':
- quiet = 1;
- break;
- case 's':
- shortline = 1;
- break;
- case 'j':
- leftline = 1;
- break;
- default:
- fprintf(stderr,
- "sysline: bad flag: %c\n", *cp);
- }
- }
- break;
- case '+':
- delay = atoi(*argv + 1);
- if (delay < 10)
- delay = 10;
- else if (delay > 500)
- delay = 500;
- synch = 0; /* no more sync */
- break;
- default:
- fprintf(stderr, "sysline: illegal argument %s\n",
- argv[0]);
- }
- if (emacs) {
- reverse = 0;
- columns = 79;
- } else /* if not to emacs window, initialize terminal dependent info */
- initterm();
- #ifdef SIGWINCH
- /*
- * When the window size changes and we are the foreground
- * process (true if -w), we get this signal.
- */
- signal(SIGWINCH, sigwinch);
- #endif
- getwinsize(); /* get window size from ioctl */
-
- /* immediately fork and let the parent die if not emacs mode */
- if (!emacs && !window && !dbug) {
- if (fork())
- exit(0);
- /* pgrp should take care of things, but ignore them anyway */
- signal(SIGINT, SIG_IGN);
- signal(SIGQUIT, SIG_IGN);
- #ifdef VMUNIX
- signal(SIGTTOU, SIG_IGN);
- #endif
- }
- /*
- * When we logoff, init will do a "vhangup()" on this
- * tty which turns off I/O access and sends a SIGHUP
- * signal. We catch this and thereby clear the status
- * display. Note that a bug in 4.1bsd caused the SIGHUP
- * signal to be sent to the wrong process, so you had to
- * `kill -HUP' yourself in your .logout file.
- * Do the same thing for SIGTERM, which is the default kill
- * signal.
- */
- signal(SIGHUP, clearbotl);
- signal(SIGTERM, clearbotl);
- /*
- * This is so kill -ALRM to force update won't screw us up..
- */
- signal(SIGALRM, SIG_IGN);
-
- uid = getuid();
- ourtty = ttyname(2); /* remember what tty we are on */
- if (printid) {
- printf("%d\n", getpid());
- fflush(stdout);
- }
- dup2(2, 1);
-
- if ((home = getenv("HOME")) == 0)
- home = "";
- strcpy1(strcpy1(whofilename, home), "/.who");
- strcpy1(strcpy1(whofilename2, home), "/.sysline");
- strcpy1(strcpy1(lockfilename, home), "/.syslinelock");
-
- if ((kmem = open(_PATH_KMEM,0)) < 0) {
- fprintf(stderr, "Can't open %s\n", _PATH_KMEM);
- exit(1);
- }
- readnamelist();
- if (proccheck)
- initprocread();
- if (mailcheck)
- if ((username = getenv("USER")) == 0)
- mailcheck = 0;
- else {
- chdir(_PATH_MAILDIR);
- if (stat(username, &mstbuf) >= 0)
- mailsize = mstbuf.st_size;
- else
- mailsize = 0;
- }
-
- while (emacs || window || isloggedin())
- if (access(lockfilename, 0) >= 0)
- sleep(60);
- else {
- prtinfo();
- sleep(delay);
- if (clr_bet_ref) {
- tputs(dis_status_line, 1, outc);
- fflush(stdout);
- sleep(5);
- }
- revtime = (1 + revtime) % REVOFF;
- }
- clearbotl();
- /*NOTREACHED*/
- }
-
- isloggedin()
- {
- /*
- * you can tell if a person has logged out if the owner of
- * the tty has changed
- */
- struct stat statbuf;
-
- return fstat(2, &statbuf) == 0 && statbuf.st_uid == uid;
- }
-
- readnamelist()
- {
- time_t bootime, clock, nintv, time();
-
- nlist(_PATH_UNIX, nl);
- if (nl[0].n_value == 0) {
- if (!quiet)
- fprintf(stderr, "No namelist\n");
- return;
- }
- lseek(kmem, (long)nl[NL_BOOT].n_value, 0);
- read(kmem, &bootime, sizeof(bootime));
- (void) time(&clock);
- nintv = clock - bootime;
- if (nintv <= 0L || nintv > 60L*60L*24L*365L) {
- if (!quiet)
- fprintf(stderr,
- "Time makes no sense... namelist must be wrong\n");
- nl[NL_PROC].n_value = 0;
- }
- }
-
- readutmp(nflag)
- char nflag;
- {
- static time_t lastmod; /* initially zero */
- static off_t utmpsize; /* ditto */
- struct stat st;
-
- if (ut < 0 && (ut = open(_PATH_UTMP, 0)) < 0) {
- fprintf(stderr, "sysline: Can't open %s.\n", _PATH_UTMP);
- exit(1);
- }
- if (fstat(ut, &st) < 0 || st.st_mtime == lastmod)
- return 0;
- lastmod = st.st_mtime;
- if (utmpsize != st.st_size) {
- utmpsize = st.st_size;
- nentries = utmpsize / sizeof (struct utmp);
- if (old == 0) {
- old = (struct utmp *)calloc(utmpsize, 1);
- new = (struct utmp *)calloc(utmpsize, 1);
- } else {
- old = (struct utmp *)realloc((char *)old, utmpsize);
- new = (struct utmp *)realloc((char *)new, utmpsize);
- free(status);
- }
- status = malloc(nentries * sizeof *status);
- if (old == 0 || new == 0 || status == 0) {
- fprintf(stderr, "sysline: Out of memory.\n");
- exit(1);
- }
- }
- lseek(ut, 0L, 0);
- (void) read(ut, (char *) (nflag ? new : old), utmpsize);
- return 1;
- }
-
- /*
- * read in the process table locations and sizes, and allocate space
- * for storing the process table. This is done only once.
- */
- initprocread()
- {
-
- if (nl[NL_PROC].n_value == 0)
- return;
- #ifdef VMUNIX
- lseek(kmem, (long)nl[NL_PROC].n_value, 0);
- read(kmem, &procadr, sizeof procadr);
- lseek(kmem, (long)nl[NL_NPROC].n_value, 0);
- read(kmem, &nproc, sizeof nproc);
- #endif
- #ifdef pdp11
- procadr = nl[NL_PROC].n_value;
- nproc = NPROC; /* from param.h */
- #endif
- if ((proc = (struct proc *) calloc(nproc, sizeof (struct proc))) == 0) {
- fprintf(stderr, "Out of memory.\n");
- exit(1);
- }
- procNPROC = proc + nproc;
- }
-
- /*
- * read in the process table. This assumes that initprocread has alread been
- * called to set up storage.
- */
- readproctab()
- {
-
- if (nl[NL_PROC].n_value == 0)
- return (0);
- lseek(kmem, (long)procadr, 0);
- read(kmem, (char *)proc, nproc * sizeof (struct proc));
- return (1);
- }
-
- prtinfo()
- {
- int on, off;
- register i;
- char fullprocess;
-
- stringinit();
- #ifdef SIGWINCH
- if (winchanged) {
- winchanged = 0;
- getwinsize();
- mustclear = 1;
- }
- #endif
- #ifdef WHO
- /* check for file named .who in the home directory */
- whocheck();
- #endif
- timeprint();
- /*
- * if mail is seen, don't print rest of info, just the mail
- * reverse new and old so that next time we run, we won't lose log
- * in and out information
- */
- if (mailcheck && (sawmail = mailseen()))
- goto bottom;
- #ifdef HOSTNAME
- #ifdef RWHO
- for (i = 0; i < nremotes; i++) {
- char *tmp;
-
- stringspace();
- tmp = sysrup(remotehost + i);
- stringcat(tmp, strlen(tmp));
- }
- #endif
- /*
- * print hostname info if requested
- */
- if (hostprint) {
- stringspace();
- stringcat(hostname, -1);
- }
- #endif
- /*
- * print load average and difference between current load average
- * and the load average 5 minutes ago
- */
- if (getloadavg(avenrun, 3) > 0) {
- double diff;
-
- stringspace();
-
- if ((diff = avenrun[0] - avenrun[1]) < 0.0)
- stringprt("%.1f %.1f", avenrun[0], diff);
- else
- stringprt("%.1f +%.1f", avenrun[0], diff);
- loadavg = avenrun[0]; /* remember load average */
- }
- /*
- * print log on and off information
- */
- stringspace();
- fullprocess = 1;
- #ifdef MAXLOAD
- if (loadavg > MAXLOAD)
- fullprocess = 0; /* too loaded to run */
- #endif
- /*
- * Read utmp file (logged in data) only if we are doing a full
- * process, or if this is the first time and we are calculating
- * the number of users.
- */
- on = off = 0;
- if (users == 0) { /* first time */
- if (readutmp(0))
- for (i = 0; i < nentries; i++)
- if (old[i].ut_name[0])
- users++;
- } else if (fullprocess && readutmp(1)) {
- struct utmp *tmp;
-
- users = 0;
- for (i = 0; i < nentries; i++) {
- if (strncmp(old[i].ut_name,
- new[i].ut_name, NAMESIZE) == 0)
- status[i] = NOCH;
- else if (old[i].ut_name[0] == '\0') {
- status[i] = ON;
- on++;
- } else if (new[i].ut_name[0] == '\0') {
- status[i] = OFF;
- off++;
- } else {
- status[i] = ON | OFF;
- on++;
- off++;
- }
- if (new[i].ut_name[0])
- users++;
- }
- tmp = new;
- new = old;
- old = tmp;
- }
- /*
- * Print:
- * 1. number of users
- * 2. a * for unread mail
- * 3. a - if load is too high
- * 4. number of processes running and stopped
- */
- stringprt("%du", users);
- if (mailsize > 0 && mstbuf.st_mtime >= mstbuf.st_atime)
- stringcat("*", -1);
- if (!fullprocess && (proccheck || logcheck))
- stringcat("-", -1);
- if (fullprocess && proccheck && readproctab()) {
- register struct proc *p;
- int procrun, procstop;
-
- /*
- * We are only interested in processes which have the same
- * uid as us, and whose parent process id is not 1.
- */
- procrun = procstop = 0;
- for (p = proc; p < procNPROC; p++) {
- if (p->p_stat == 0 || p->p_pgrp == 0 ||
- p->p_uid != uid || p->p_ppid == 1)
- continue;
- switch (p->p_stat) {
- case SSTOP:
- procstop++;
- break;
- case SSLEEP:
- /*
- * Sleep can mean waiting for a signal or just
- * in a disk or page wait queue ready to run.
- * We can tell if it is the later by the pri
- * being negative.
- */
- if (p->p_pri < PZERO)
- procrun++;
- break;
- case SWAIT:
- case SRUN:
- case SIDL:
- procrun++;
- }
- }
- if (procrun > 0 || procstop > 0) {
- stringspace();
- if (procrun > 0 && procstop > 0)
- stringprt("%dr %ds", procrun, procstop);
- else if (procrun > 0)
- stringprt("%dr", procrun);
- else
- stringprt("%ds", procstop);
- }
- }
- /*
- * If anyone has logged on or off, and we are interested in it,
- * print it out.
- */
- if (logcheck) {
- /* old and new have already been swapped */
- if (on) {
- stringspace();
- stringcat("on:", -1);
- for (i = 0; i < nentries; i++)
- if (status[i] & ON) {
- stringprt(" %.8s", old[i].ut_name);
- ttyprint(old[i].ut_line);
- }
- }
- if (off) {
- stringspace();
- stringcat("off:", -1);
- for (i = 0; i < nentries; i++)
- if (status[i] & OFF) {
- stringprt(" %.8s", new[i].ut_name);
- ttyprint(new[i].ut_line);
- }
- }
- }
- bottom:
- /* dump out what we know */
- stringdump();
- }
-
- timeprint()
- {
- long curtime;
- struct tm *tp, *localtime();
- static int beepable = 1;
-
- /* always print time */
- time(&curtime);
- tp = localtime(&curtime);
- if (dateprint)
- stringprt("%.11s", ctime(&curtime));
- stringprt("%d:%02d", tp->tm_hour > 12 ? tp->tm_hour - 12 :
- (tp->tm_hour == 0 ? 12 : tp->tm_hour), tp->tm_min);
- if (synch) /* sync with clock */
- delay = 60 - tp->tm_sec;
- /*
- * Beepable is used to insure that we get at most one set of beeps
- * every half hour.
- */
- if (beep)
- if (beepable) {
- if (tp->tm_min == 30) {
- tputs(bell, 1, outc);
- fflush(stdout);
- beepable = 0;
- } else if (tp->tm_min == 0) {
- tputs(bell, 1, outc);
- fflush(stdout);
- sleep(2);
- tputs(bell, 1, outc);
- fflush(stdout);
- beepable = 0;
- }
- } else
- if (tp->tm_min != 0 && tp->tm_min != 30)
- beepable = 1;
- }
-
- /*
- * whocheck -- check for file named .who and print it on the who line first
- */
- whocheck()
- {
- int chss;
- register char *p;
- char buff[81];
- int whofile;
-
- if ((whofile = open(whofilename, 0)) < 0 &&
- (whofile = open(whofilename2, 0)) < 0)
- return;
- chss = read(whofile, buff, sizeof buff - 1);
- close(whofile);
- if (chss <= 0)
- return;
- buff[chss] = '\0';
- /*
- * Remove all line feeds, and replace by spaces if they are within
- * the message, else replace them by nulls.
- */
- for (p = buff; *p;)
- if (*p == '\n')
- if (p[1])
- *p++ = ' ';
- else
- *p = '\0';
- else
- p++;
- stringcat(buff, p - buff);
- stringspace();
- }
-
- /*
- * ttyprint -- given the name of a tty, print in the string buffer its
- * short name surrounded by parenthesis.
- * ttyxx is printed as (xx)
- * console is printed as (cty)
- */
- ttyprint(name)
- char *name;
- {
- char buff[11];
-
- if (strncmp(name, "tty", 3) == 0)
- stringprt("(%.*s)", LINESIZE - 3, name + 3);
- else if (strcmp(name, "console") == 0)
- stringcat("(cty)", -1);
- else
- stringprt("(%.*s)", LINESIZE, name);
- }
-
- /*
- * mail checking function
- * returns 0 if no mail seen
- */
- mailseen()
- {
- FILE *mfd;
- register n;
- register char *cp;
- char lbuf[100], sendbuf[100], *bufend;
- char seenspace;
- int retval = 0;
-
- if (stat(username, &mstbuf) < 0) {
- mailsize = 0;
- return 0;
- }
- if (mstbuf.st_size <= mailsize || (mfd = fopen(username,"r")) == NULL) {
- mailsize = mstbuf.st_size;
- return 0;
- }
- fseek(mfd, mailsize, 0);
- while ((n = readline(mfd, lbuf, sizeof lbuf)) >= 0 &&
- strncmp(lbuf, "From ", 5) != 0)
- ;
- if (n < 0) {
- stringcat("Mail has just arrived", -1);
- goto out;
- }
- retval = 1;
- /*
- * Found a From line, get second word, which is the sender,
- * and print it.
- */
- for (cp = lbuf + 5; *cp && *cp != ' '; cp++) /* skip to blank */
- ;
- *cp = '\0'; /* terminate name */
- stringspace();
- stringprt("Mail from %s ", lbuf + 5);
- /*
- * Print subject, and skip over header.
- */
- while ((n = readline(mfd, lbuf, sizeof lbuf)) > 0)
- if (strncmp(lbuf, "Subject:", 8) == 0)
- stringprt("on %s ", lbuf + 9);
- if (!emacs)
- stringcat(arrows, 2);
- else
- stringcat(": ", 2);
- if (n < 0) /* already at eof */
- goto out;
- /*
- * Print as much of the letter as we can.
- */
- cp = sendbuf;
- if ((n = columns - chars) > sizeof sendbuf - 1)
- n = sizeof sendbuf - 1;
- bufend = cp + n;
- seenspace = 0;
- while ((n = readline(mfd, lbuf, sizeof lbuf)) >= 0) {
- register char *rp;
-
- if (strncmp(lbuf, "From ", 5) == 0)
- break;
- if (cp >= bufend)
- continue;
- if (!seenspace) {
- *cp++ = ' '; /* space before lines */
- seenspace = 1;
- }
- rp = lbuf;
- while (*rp && cp < bufend)
- if (isspace(*rp)) {
- if (!seenspace) {
- *cp++ = ' ';
- seenspace = 1;
- }
- rp++;
- } else {
- *cp++ = *rp++;
- seenspace = 0;
- }
- }
- *cp = 0;
- stringcat(sendbuf, -1);
- /*
- * Want to update write time so a star will
- * appear after the number of users until the
- * user reads his mail.
- */
- out:
- mailsize = linebeg;
- fclose(mfd);
- touch(username);
- return retval;
- }
-
- /*
- * readline -- read a line from fp and store it in buf.
- * return the number of characters read.
- */
- readline(fp, buf, n)
- register FILE *fp;
- char *buf;
- register n;
- {
- register c;
- register char *cp = buf;
-
- linebeg = ftell(fp); /* remember loc where line begins */
- cp = buf;
- while (--n > 0 && (c = getc(fp)) != EOF && c != '\n')
- *cp++ = c;
- *cp = 0;
- if (c == EOF && cp - buf == 0)
- return -1;
- return cp - buf;
- }
-
-
- /*
- * string hacking functions
- */
-
- stringinit()
- {
- sp = strarr;
- chars = 0;
- }
-
- /*VARARGS1*/
- stringprt(format, a, b, c)
- char *format;
- {
- char tempbuf[150];
-
- (void)sprintf(tempbuf, format, a, b, c);
- stringcat(tempbuf, -1);
- }
-
- stringdump()
- {
- char bigbuf[sizeof strarr + 200];
- register char *bp = bigbuf;
- register int i;
-
- if (!emacs) {
- if (sawmail)
- bp = strcpy1(bp, bell);
- if (eslok)
- bp = strcpy1(bp, tparm(to_status_line,
- leftline ? 0 : columns - chars));
- else {
- bp = strcpy1(bp, to_status_line);
- if (!shortline && !leftline)
- for (i = columns - chars; --i >= 0;)
- *bp++ = ' ';
- }
- if (reverse && revtime != 0)
- bp = strcpy1(bp, rev_out);
- }
- *sp = 0;
- bp = strcpy1(bp, strarr);
- if (!emacs) {
- if (reverse)
- bp = strcpy1(bp, rev_end);
- bp = strcpy1(bp, from_status_line);
- if (sawmail)
- bp = strcpy1(strcpy1(bp, bell), bell);
- *bp = 0;
- tputs(bigbuf, 1, outc);
- if (mustclear) {
- mustclear = 0;
- tputs(clr_eol, 1, outc);
- }
- if (dbug)
- putchar('\n');
- fflush(stdout);
- } else
- write(2, bigbuf, bp - bigbuf);
- }
-
- stringspace()
- {
- if (reverse && revtime != 0) {
- #ifdef TERMINFO
- stringcat(rev_end,
- magic_cookie_glitch <= 0 ? 0 : magic_cookie_glitch);
- stringcat(" ", 1);
- stringcat(rev_out,
- magic_cookie_glitch <= 0 ? 0 : magic_cookie_glitch);
- #else
- stringcat(rev_end, 0);
- stringcat(" ", 1);
- stringcat(rev_out, 0);
- #endif TERMINFO
- } else
- stringcat(" ", 1);
- }
-
- /*
- * stringcat :: concatenate the characters in string str to the list we are
- * building to send out.
- * str - the string to print. may contain funny (terminal control) chars.
- * n - the number of printable characters in the string
- * or if -1 then str is all printable so we can truncate it,
- * otherwise don't print only half a string.
- */
- stringcat(str, n)
- register char *str;
- register n;
- {
- register char *p = sp;
-
- if (n < 0) { /* truncate */
- n = columns - chars;
- while ((*p++ = *str++) && --n >= 0)
- ;
- p--;
- chars += p - sp;
- sp = p;
- } else if (chars + n <= columns) { /* don't truncate */
- while (*p++ = *str++)
- ;
- chars += n;
- sp = p - 1;
- }
- }
-
- /*
- * touch :: update the modify time of a file.
- */
- touch(name)
- char *name; /* name of file */
- {
- register fd;
- char buf;
-
- if ((fd = open(name, 2)) >= 0) {
- read(fd, &buf, 1); /* get first byte */
- lseek(fd, 0L, 0); /* go to beginning */
- write(fd, &buf, 1); /* and rewrite first byte */
- close(fd);
- }
- }
-
-
- /*
- * clearbotl :: clear bottom line.
- * called when process quits or is killed.
- * it clears the bottom line of the terminal.
- */
- clearbotl()
- {
- register int fd;
- int exit();
-
- signal(SIGALRM, exit);
- alarm(30); /* if can't open in 30 secs, just die */
- if (!emacs && (fd = open(ourtty, 1)) >= 0) {
- write(fd, dis_status_line, strlen(dis_status_line));
- close(fd);
- }
- #ifdef PROF
- if (chdir(_PATH_SYSLINE) < 0)
- (void) chdir(_PATH_TMP);
- #endif
- exit(0);
- }
-
- #ifdef TERMINFO
- initterm()
- {
- static char standbuf[40];
-
- setupterm(0, 1, 0);
- if (!window && !has_status_line) {
- /* not an appropriate terminal */
- if (!quiet)
- fprintf(stderr, "sysline: no status capability for %s\n",
- getenv("TERM"));
- exit(1);
- }
- if (window || status_line_esc_ok) {
- if (set_attributes) {
- /* reverse video mode */
- strcpy(standbuf,
- tparm(set_attributes,0,0,1,0,0,0,0,0,0));
- rev_out = standbuf;
- rev_end = exit_attribute_mode;
- } else if (enter_standout_mode && exit_standout_mode) {
- rev_out = enter_standout_mode;
- rev_end = exit_standout_mode;
- } else
- rev_out = rev_end = "";
- } else
- rev_out = rev_end = "";
- columns--; /* avoid cursor wraparound */
- }
-
- #else /* TERMCAP */
-
- initterm()
- {
- char *term, *cp;
- static char tbuf[1024];
- char is2[40];
- extern char *UP;
-
- if ((term = getenv("TERM")) == NULL) {
- if (!quiet)
- fprintf(stderr,
- "sysline: No TERM variable in enviroment\n");
- exit(1);
- }
- if (tgetent(tbuf, term) <= 0) {
- if (!quiet)
- fprintf(stderr,
- "sysline: Unknown terminal type: %s\n", term);
- exit(1);
- }
- if (!window && tgetflag("hs") <= 0) {
- if (!strncmp(term, "h19", 3)) {
- /* for upward compatability with h19sys */
- strcpy(to_status_line,
- "\033j\033x5\033x1\033Y8%+ \033o");
- strcpy(from_status_line, "\033k\033y5");
- strcpy(dis_status_line, "\033y1");
- strcpy(rev_out, "\033p");
- strcpy(rev_end, "\033q");
- arrows = "\033Fhh\033G";
- columns = 80;
- UP = "\b";
- return;
- }
- if (!quiet)
- fprintf(stderr,
- "sysline: No status capability for %s\n", term);
- exit(1);
- }
- cp = is2;
- if (tgetstr("i2", &cp) != NULL) {
- /* someday tset will do this */
- tputs(is2, 1, erroutc);
- fflush(stdout);
- }
-
- /* the "-1" below is to avoid cursor wraparound problems */
- columns = tgetnum("ws");
- hasws = columns >= 0;
- if (!hasws)
- columns = tgetnum("co");
- columns -= 1;
- if (window) {
- strcpy(to_status_line, "\r");
- cp = dis_status_line; /* use the clear line sequence */
- *cp++ = '\r';
- tgetstr("ce", &cp);
- if (leftline)
- strcpy(from_status_line, dis_status_line + 1);
- else
- strcpy(from_status_line, "");
- } else {
- cp = to_status_line;
- tgetstr("ts", &cp);
- cp = from_status_line;
- tgetstr("fs", &cp);
- cp = dis_status_line;
- tgetstr("ds", &cp);
- eslok = tgetflag("es");
- }
- if (eslok || window) {
- cp = rev_out;
- tgetstr("so", &cp);
- cp = rev_end;
- tgetstr("se", &cp);
- cp = clr_eol;
- tgetstr("ce", &cp);
- } else
- reverse = 0; /* turn off reverse video */
- UP = "\b";
- if (!strncmp(term, "h19", 3))
- arrows = "\033Fhh\033G"; /* "two tiny graphic arrows" */
- else
- arrows = "->";
- }
- #endif TERMINFO
-
- #ifdef RWHO
- char *
- sysrup(hp)
- register struct remotehost *hp;
- {
- char filename[100];
- struct whod wd;
- #define WHOD_HDR_SIZE (sizeof (wd) - sizeof (wd.wd_we))
- static char buffer[50];
- time_t now;
-
- /*
- * rh_file is initially 0.
- * This is ok since standard input is assumed to exist.
- */
- if (hp->rh_file == 0) {
- /*
- * Try rwho hostname file, and if that fails try ucbhostname.
- */
- (void) strcpy1(strcpy1(filename, _PATH_RWHO), hp->rh_host);
- if ((hp->rh_file = open(filename, 0)) < 0) {
- (void) strcpy1(strcpy1(strcpy1(filename, _PATH_RWHO),
- NETPREFIX), hp->rh_host);
- hp->rh_file = open(filename, 0);
- }
- }
- if (hp->rh_file < 0) {
- (void) sprintf(buffer, "%s?", hp->rh_host);
- return(buffer);
- }
- (void) lseek(hp->rh_file, (off_t)0, 0);
- if (read(hp->rh_file, (char *)&wd, WHOD_HDR_SIZE) != WHOD_HDR_SIZE) {
- (void) sprintf(buffer, "%s ?", hp->rh_host);
- return(buffer);
- }
- (void) time(&now);
- if (now - wd.wd_recvtime > DOWN_THRESHOLD) {
- long interval;
- long days, hours, minutes;
-
- interval = now - wd.wd_recvtime;
- minutes = (interval + 59) / 60; /* round to minutes */
- hours = minutes / 60; /* extract hours from minutes */
- minutes %= 60; /* remove hours from minutes */
- days = hours / 24; /* extract days from hours */
- hours %= 24; /* remove days from hours */
- if (days > 7 || days < 0)
- (void) sprintf(buffer, "%s down", hp->rh_host);
- else if (days > 0)
- (void) sprintf(buffer, "%s %d+%d:%02d",
- hp->rh_host, days, hours, minutes);
- else
- (void) sprintf(buffer, "%s %d:%02d",
- hp->rh_host, hours, minutes);
- } else
- (void) sprintf(buffer, "%s %.1f",
- hp->rh_host, wd.wd_loadav[0]/100.0);
- return buffer;
- }
- #endif RWHO
-
- getwinsize()
- {
- #ifdef TIOCGWINSZ
- struct winsize winsize;
-
- /* the "-1" below is to avoid cursor wraparound problems */
- if (!hasws && ioctl(2, TIOCGWINSZ, (char *)&winsize) >= 0 &&
- winsize.ws_col != 0)
- columns = winsize.ws_col - 1;
- #endif
- }
-
- #ifdef SIGWINCH
- sigwinch()
- {
- winchanged++;
- }
- #endif
-
- char *
- strcpy1(p, q)
- register char *p, *q;
- {
-
- while (*p++ = *q++)
- ;
- return p - 1;
- }
-
- outc(c)
- char c;
- {
- if (dbug)
- printf("%s", unctrl(c));
- else
- putchar(c);
- }
-
- erroutc(c)
- char c;
- {
- if (dbug)
- fprintf(stderr, "%s", unctrl(c));
- else
- putc(c, stderr);
- }
-