Usenet 1993 July/InfoMagic USENET CD-ROM July 1993.ISO/sources/misc/volume8/hint/part02

Text File | 1989-08-24 | 26.0 KB | 819 lines

Newsgroups: comp.sources.misc
From: [e-mail] (Brandon S. Allbery - comp.sources.misc)
subject: v08i017: hint, an unobtrusive messager, part 2 of 2
Reply-To: [e-mail] (David MacKenzie)

Posting-number: Volume 8, Issue 17
Submitted-by: [e-mail] (David MacKenzie)
Archive-name: hint/part02

#! /bin/sh
# This is a shell archive.  Remove anything before this line, then unpack
# it by saving it into a file and typing "sh file".  To overwrite existing
# files, type "sh file -c".  You can also feed this as standard input via
# unshar, or by typing "sh <file", e.g..  If this archive is complete, you
# will see the following message at the end:
#        "End of archive 2 (of 2)."
# Contents:  tty.c clearhint.c Makefile COPYING
# Wrapped by dave@zedfdc on Thu Aug 24 20:10:06 1989
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
if test -f 'tty.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'tty.c'\"
else
echo shar: Extracting \"'tty.c'\" \(6097 characters\)
sed "s/^X//" >'tty.c' <<'END_OF_FILE'
X/* tty.c -- functions dealing with terminals and termcap
X   Copyright (C) 1989 David MacKenzie
X
X   This program is free software; you can redistribute it and/or modify
X   it under the terms of the GNU General Public License as published by
X   the Free Software Foundation; either version 1, or (at your option)
X   any later version.
X
X   This program is distributed in the hope that it will be useful,
X   but WITHOUT ANY WARRANTY; without even the implied warranty of
X   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
X   GNU General Public License for more details.
X
X   You should have received a copy of the GNU General Public License
X   along with this program; if not, write to the Free Software
X   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
X
X#include "hint.h"
X
X/* Termcap codes.  */
Xstatic char *tc_ts;        /* To status line. */
Xstatic char *tc_fs;        /* From status line. */
Xstatic char *tc_ds;        /* Disable (clear) status line. */
Xstatic char *tc_bl;        /* Bell (possibly visual). */
Xstatic short tc_ws;        /* Width (in columns) of status line. */
X
X/* Send the message to `tt->tt_tty'.  Use hinttab to determine what the
X   status line codes for that terminal are.  */
X
Xvoid
Xsendhint (tt)
X     struct ttylist *tt;
X{
X  int fd;
X
X  if (!hintable (tt->tt_tty))
X    {
X      fprintf (stderr, "%s: %s on %s is no longer accepting hints\n",
X           program_name, tt->tt_user, tt->tt_tty);
X      return;
X    }
X  init_buffer ();
X  /* We put the beep here because bells sometimes don't work when in the
X     status line. */
X  tputs (tt->tt_ht.h_bl, 1, buffer_char);
X  tputs (tgoto (tt->tt_ht.h_ts, 0, 0), 1, buffer_char);
X  if (!name_at_end)
X    {
X      buffer_string ("(");
X      buffer_string (whoami ());
X      buffer_string (") ");
X    }
X  buffer_string (message);
X  if (name_at_end)
X    {
X      buffer_string (" - ");;
X      buffer_string (whoami ());
X    }
X  tputs (tt->tt_ht.h_fs, 1, buffer_char);
X
X  fd = open (tt->tt_tty, O_WRONLY);
X  if (fd == -1)
X    pfatal (tt->tt_tty);
X  flush_buffer (fd);
X  close (fd);
X}
X
X/* Erase the hint from `tt->tt_tty'.  */
X
Xvoid
Xerasehint (tt)
X     struct ttylist *tt;
X{
X  int fd;
X
X  init_buffer ();
X  tputs (tt->tt_ht.h_ds, 1, buffer_char);
X
X  fd = open (tt->tt_tty, O_WRONLY);
X  if (fd == -1)
X    pfatal (tt->tt_tty);
X  flush_buffer (fd);
X  close (fd);
X}
X
X/* Return our username.  First try utmp entry; if that fails, use uid.
X   Guaranteed to return a string 8 characters or shorter.  */
X
Xchar *
Xwhoami ()
X{
X  char *me;
X
X  me = getlogin ();
X  if (me == NULL)
X    me = pwname ();
X  if (strlen (me) > 8)
X    me[8] = 0;
X  return me;
X}
X
X/* Return the passwd name based on our uid.  */
X
Xchar *
Xpwname ()
X{
X  struct passwd *pw;
X
X  pw = getpwuid (getuid ());
X  if (pw == NULL)
X    return "";
X  else
X    return pw->pw_name;
X}
X
X/* Set the entry in hinttab for tty `tty' (a full path).
X
X   First we search for an existing (invalid) entry for `tty', and if
X   we find one, we update it.
X
X   If we don't find one, we open the file in
X   APPEND mode, and add a new entry to the end.  Since we're using
X   atomic writes, we don't need to use any special file locking to
X   prevent competing hint processes from writing scrambled entries to
X   the end of the file.  */
X
Xvoid
Xupdatetab (tty)
X     char *tty;
X{
X  static struct hinttab h;
X
X  /* Search the hinttab for an old entry for `tty'. */
X  sethtent ();
X  if (!gethttty (tty))
X    {
X      /* No previous entry for `tty'.  Add one. */
X      endhtent ();
X      sethtapp ();
X    }
X  setup_termcap ();
X  get_speed ();
X  strcpy (h.h_tty, tty);
X  strcpy (h.h_ts, tc_ts);
X  strcpy (h.h_fs, tc_fs);
X  strcpy (h.h_ds, tc_ds);
X  strcpy (h.h_bl, tc_bl);
X  h.h_ws = tc_ws;
X  writehtent (&h);
X  endhtent ();
X}
X
X/* These functions do their best to provide atomic writes, since
X   we don't want our output getting mixed up with that of foreground
X   processes.  They don't check for overflows.  */
X
Xstatic char output_buffer[300];
Xstatic int buffer_length;
X
Xvoid
Xinit_buffer ()
X{
X  buffer_length = 0;
X}
X
Xint
Xbuffer_char (c)
X     int c;
X{
X  output_buffer[buffer_length++] = c;
X}
X
X/* `s' is a null-terminated string. */
X
Xvoid
Xbuffer_string (s)
X     char *s;
X{
X  while (*s)
X    output_buffer[buffer_length++] = *s++;
X}
X
Xvoid
Xflush_buffer (fd)
X     int fd;
X{
X  write (fd, output_buffer, buffer_length);
X}
X
X/* Output speed for tputs. */
Xextern short ospeed;
X
X/* Padding character for tputs. */
Xextern char PC;
X
X/* For tgoto. */
Xextern char *BC, *UP;
X
X/* Raw termcap entry. */
Xstatic char entry[1024];
X
X/* Extracted termcap strings. */
Xstatic char strings[1024];
X
X/* Initialize global termcap strings.  */
X
Xvoid
Xsetup_termcap ()
X{
X  char *tc_pc;            /* Padding character string. */
X
X  if (term == NULL)
X    {
X      fprintf (stderr, "%s: TERM environment variable is not defined\n",
X           program_name);
X      exit (1);
X    }
X  switch (tgetent (entry, term))
X    {
X    case 0:
X      fprintf (stderr,
X           "%s: Terminal type %s is unknown\n", program_name, term);
X      exit (1);
X    case -1:
X      fprintf (stderr,
X       "%s: Cannot open terminal description database\n", program_name);
X      exit (1);
X    }
X
X  /* Re-use term to point to space for next extracted string. */
X  term = strings;
X  tc_pc = tgetstr ("pc", &term);
X  PC = tc_pc ? *tc_pc : 0;
X  BC = UP = NULL;
X  if (tgetflag ("hs"))
X    {
X      /* tgetstr returns NULL if the capability was not found. */
X      tc_ts = tgetstr ("ts", &term);
X      tc_fs = tgetstr ("fs", &term);
X      tc_ds = tgetstr ("ds", &term);
X      tc_ws = tgetnum ("ws");
X      if (tc_ws == -1)
X    tc_ws = DEF_WS;
X    }
X  else
X    {
X      tc_ts = tc_fs = tc_ds = "";
X      tc_ws = DEF_WS;
X    }
X  if (use_vbell)
X    tc_bl = tgetstr ("vb", &term);
X  else
X    tc_bl = NULL;
X  if (use_bell && !tc_bl)
X    {
X      tc_bl = tgetstr ("bl", &term);
X      if (!tc_bl)
X    tc_bl = "\7";
X    }
X  else
X    tc_bl = "";
X}
X
Xvoid
Xget_speed ()
X{
X#ifdef USG
X  struct termio tty_buffer;
X
X  if (ioctl (1, TCGETA, &tty_buffer) != -1)
X    ospeed = tty_buffer.c_cflag & CBAUD;
X#else
X  struct sgttyb tty_buffer;
X
X  if (gtty (1, &tty_buffer) != -1)
X    ospeed = tty_buffer.sg_ospeed;
X#endif
X  else
X    ospeed = 0;
X}
END_OF_FILE
if test 6097 -ne `wc -c <'tty.c'`; then
    echo shar: \"'tty.c'\" unpacked with wrong size!
fi
# end of 'tty.c'
fi
if test -f 'clearhint.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'clearhint.c'\"
else
echo shar: Extracting \"'clearhint.c'\" \(2958 characters\)
sed "s/^X//" >'clearhint.c' <<'END_OF_FILE'
X/* clearhint.c -- clear terminal status line
X   Copyright (C) 1989 David MacKenzie
X
X   This program is free software; you can redistribute it and/or modify
X   it under the terms of the GNU General Public License as published by
X   the Free Software Foundation; either version 1, or (at your option)
X   any later version.
X
X   This program is distributed in the hope that it will be useful,
X   but WITHOUT ANY WARRANTY; without even the implied warranty of
X   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
X   GNU General Public License for more details.
X
X   You should have received a copy of the GNU General Public License
X   along with this program; if not, write to the Free Software
X   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
X
X/* clearhint - clear terminal status line
X
X   Usage: clearhint [-T terminal]
X
X   David MacKenzie
X   Latest revision: 08/15/89 */
X
X#include <stdio.h>
X#ifdef USG
X#include <termio.h>
X#else
X#include <sgtty.h>
X#endif
X
Xchar *getenv ();
Xchar *tgetstr ();
Xvoid exit ();
X
Xint tcputchar ();
Xvoid getspeed ();
Xvoid usage ();
X
Xextern short ospeed;        /* Output speed of stdout for tputs. */
Xextern char PC;            /* Pad character for tputs. */
X
Xint
Xmain (argc, argv)
X     int argc;
X     char **argv;
X{
X  extern char *optarg;
X  extern int optind;
X  char entry[1024];        /* Raw termcap entry. */
X  char strings[80];        /* Extracted termcap strings. */
X  char *term;            /* Environment variable TERM. */
X  char *next_string;        /* Pointer into strings. */
X  char *tc_ds;            /* Disable status line string. */
X  char *tc_pc;            /* Pad character string. */
X  int c;            /* Option character. */
X
X  term = getenv ("TERM");
X  while ((c = getopt (argc, argv, "T:")) != EOF)
X    if (c == 'T')
X      term = optarg;
X    else
X      usage (argv[0]);
X  if (optind != argc)
X    usage (argv[0]);
X
X  if (term == NULL)
X    {
X      fprintf (stderr,
X           "%s: TERM environment variable is not defined\n", argv[0]);
X      exit (1);
X    }
X
X  switch (tgetent (entry, term))
X    {
X    case 0:
X      fprintf (stderr,
X           "%s: Terminal type %s is unknown\n", argv[0], term);
X      exit (1);
X    case -1:
X      fprintf (stderr,
X           "%s: Cannot open terminal description database\n", argv[0]);
X      exit (1);
X    }
X
X  getspeed ();
X
X  next_string = strings;
X  tc_pc = tgetstr ("pc", &next_string);
X  PC = tc_pc ? *tc_pc : 0;
X  tc_ds = tgetstr ("ds", &next_string);
X  if (tc_ds)
X    {
X      tputs (tc_ds, 1, tcputchar);
X      exit (0);
X    }
X  exit (1);
X  /* NOTREACHED */
X}
X
Xvoid
Xgetspeed ()
X{
X#ifdef USG
X  struct termio tty_buffer;
X
X  if (ioctl (1, TCGETA, &tty_buffer) != -1)
X    ospeed = tty_buffer.c_cflag & CBAUD;
X#else
X  struct sgttyb tty_buffer;
X
X  if (gtty (1, &tty_buffer) != -1)
X    ospeed = tty_buffer.sg_ospeed;
X#endif
X  else
X    ospeed = 0;
X}
X
Xint
Xtcputchar (c)
X     int c;
X{
X  putchar (c & 0x7f);
X  return c;
X}
X
Xvoid
Xusage (program)
X     char *program;
X{
X  fprintf (stderr, "Usage: %s [-T terminal]\n", program);
X  exit (1);
X}
END_OF_FILE
if test 2958 -ne `wc -c <'clearhint.c'`; then
    echo shar: \"'clearhint.c'\" unpacked with wrong size!
fi
# end of 'clearhint.c'
fi
if test -f 'Makefile' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'Makefile'\"
else
echo shar: Extracting \"'Makefile'\" \(1704 characters\)
sed "s/^X//" >'Makefile' <<'END_OF_FILE'
X# Makefile for hint
X# David MacKenzie
X# Latest revision: 08/24/89
X
X# Targets:
X# all (default)
X#  Make the executables of hint and clearhint in the current directory.
X# install
X#  Copy the executables into $(BINDIR) and chmod them (must be root).
X# initialize
X#  Create and clear $(DATAFILE).
X# clean
X#  Remove executable, object and temporary files from current directory.
X# lint
X#  Run lint on hint sources with output in LINT.OUT.
X# tags
X#  Run ctags on hint sources.
X# kit
X#  Make shell archive.
X
XSHELL = /bin/sh
X
X# Path of the file containing hint y users' termcap strings.
XDATAFILE = /usr/local/lib/hinttab
X
X# Directory for the binaries to go in.
XBINDIR = /usr/new
X
X# DEFS should include -DUSG on System V.
XDEFS = -DHINTTAB=\"$(DATAFILE)\" -DUSG
XCFLAGS = -O $(DEFS)
XLDFLAGS = -s
X# LIBS should include -ltermcap on BSD, -lcurses on System V.
XLIBS = -lcurses
X
XHDRS  = hint.h
X# Include str.c and str.o on BSD; comment them out on System V.
XSRCS  = main.c hinttab.c stov.c tty.c user.c # str.c
XOBJS  = main.o hinttab.o stov.o tty.o user.o # str.o
X
Xall: hint clearhint
X
Xhint: $(OBJS)
X    $(CC) -o hint $(LDFLAGS) $(OBJS) $(LIBS)
X    chmod 4755 hint
X
X$(OBJS): $(HDRS)
X
X
Xclearhint: clearhint.c
X    $(CC) -o clearhint $(CFLAGS) $(LDFLAGS) clearhint.c $(LIBS)
X
Xinstall: hint clearhint hall.sh
X    cp hint $(BINDIR)/hint
X    chmod 4755 $(BINDIR)/hint
X    cp clearhint $(BINDIR)/clearhint
X    chmod 755 $(BINDIR)/clearhint
X    cp hall.sh $(BINDIR)/hall
X    chmod 755 $(BINDIR)/hall
X
Xinitialize:
X    cat /dev/null > $(DATAFILE)
X    chmod 644 $(DATAFILE)
X
Xclean:
X    rm -f $(OBJS) hint clearhint LINT.OUT tags a.out mon.out core RUNLOG
X
Xlint:
X    lint $(DEFS) $(SRCS) $(LIBS) > LINT.OUT
X
Xtags:    $(SRCS)
X    ctags $(SRCS)
X
Xkit:
X    makekit -m -p -nHint -s40k
END_OF_FILE
if test 1704 -ne `wc -c <'Makefile'`; then
    echo shar: \"'Makefile'\" unpacked with wrong size!
fi
# end of 'Makefile'
fi
if test -f 'COPYING' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'COPYING'\"
else
echo shar: Extracting \"'COPYING'\" \(12488 characters\)
sed "s/^X//" >'COPYING' <<'END_OF_FILE'
X
X            GNU GENERAL PUBLIC LICENSE
X             Version 1, February 1989
X
X Copyright (C) 1989 Free Software Foundation, Inc.
X                    675 Mass Ave, Cambridge, MA 02139, USA
X Everyone is permitted to copy and distribute verbatim copies
X of this license document, but changing it is not allowed.
X
X                Preamble
X
X  The license agreements of most software companies try to keep users
Xat the mercy of those companies.  By contrast, our General Public
XLicense is intended to guarantee your freedom to share and change free
Xsoftware--to make sure the software is free for all its users.  The
XGeneral Public License applies to the Free Software Foundation's
Xsoftware and to any other program whose authors commit to using it.
XYou can use it for your programs, too.
X
X  When we speak of free software, we are referring to freedom, not
Xprice.  Specifically, the General Public License is designed to make
Xsure that you have the freedom to give away or sell copies of free
Xsoftware, that you receive source code or can get it if you want it,
Xthat you can change the software or use pieces of it in new free
Xprograms; and that you know you can do these things.
X
X  To protect your rights, we need to make restrictions that forbid
Xanyone to deny you these rights or to ask you to surrender the rights.
XThese restrictions translate to certain responsibilities for you if you
Xdistribute copies of the software, or if you modify it.
X
X  For example, if you distribute copies of a such a program, whether
Xgratis or for a fee, you must give the recipients all the rights that
Xyou have.  You must make sure that they, too, receive or can get the
Xsource code.  And you must tell them their rights.
X
X  We protect your rights with two steps: (1) copyright the software, and
X(2) offer you this license which gives you legal permission to copy,
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X
X  Also, for each author's protection and ours, we want to make certain
Xthat everyone understands that there is no warranty for this free
Xsoftware.  If the software is modified by someone else and passed on, we
Xwant its recipients to know that what they have is not the original, so
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X
X  The precise terms and conditions for copying, distribution and
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X   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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XREPAIR OR CORRECTION.
X
X  10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
XWILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
XREDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
XINCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
XOUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
XTO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
XYOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
XPROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
XPOSSIBILITY OF SUCH DAMAGES.
X
X             END OF TERMS AND CONDITIONS
X
X    Appendix: How to Apply These Terms to Your New Programs
X
X  If you develop a new program, and you want it to be of the greatest
Xpossible use to humanity, the best way to achieve this is to make it
Xfree software which everyone can redistribute and change under these
Xterms.
X
X  To do so, attach the following notices to the program.  It is safest to
Xattach them to the start of each source file to most effectively convey
Xthe exclusion of warranty; and each file should have at least the
X"copyright" line and a pointer to where the full notice is found.
X
X    <one line to give the program's name and a brief idea of what it does.>
X    Copyright (C) 19yy  <name of author>
X
X    This program is free software; you can redistribute it and/or modify
X    it under the terms of the GNU General Public License as published by
X    the Free Software Foundation; either version 1, or (at your option)
X    any later version.
X
X    This program is distributed in the hope that it will be useful,
X    but WITHOUT ANY WARRANTY; without even the implied warranty of
X    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
X    GNU General Public License for more details.
X
X    You should have received a copy of the GNU General Public License
X    along with this program; if not, write to the Free Software
X    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
X
XAlso add information on how to contact you by electronic and paper mail.
X
XIf the program is interactive, make it output a short notice like this
Xwhen it starts in an interactive mode:
X
X    Gnomovision version 69, Copyright (C) 19xx name of author
X    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
X    This is free software, and you are welcome to redistribute it
X    under certain conditions; type `show c' for details.
X
XThe hypothetical commands `show w' and `show c' should show the
Xappropriate parts of the General Public License.  Of course, the
Xcommands you use may be called something other than `show w' and `show
Xc'; they could even be mouse-clicks or menu items--whatever suits your
Xprogram.
X
XYou should also get your employer (if you work as a programmer) or your
Xschool, if any, to sign a "copyright disclaimer" for the program, if
Xnecessary.  Here a sample; alter the names:
X
X  Yoyodyne, Inc., hereby disclaims all copyright interest in the
X  program `Gnomovision' (a program to direct compilers to make passes
X  at assemblers) written by James Hacker.
X
X  <signature of Ty Coon>, 1 April 1989
X  Ty Coon, President of Vice
X
XThat's all there is to it!
END_OF_FILE
if test 12488 -ne `wc -c <'COPYING'`; then
    echo shar: \"'COPYING'\" unpacked with wrong size!
fi
# end of 'COPYING'
fi
echo shar: End of archive 2 \(of 2\).
cp /dev/null ark2isdone
MISSING=""
for I in 1 2 ; do
    if test ! -f ark${I}isdone ; then
    MISSING="${MISSING} ${I}"
    fi
done
if test "${MISSING}" = "" ; then
    echo You have unpacked both archives.
    rm -f ark[1-9]isdone
else
    echo You still need to unpack the following archives:
    echo "        " ${MISSING}
fi
##  End of shell archive.
exit 0