Rework source layout in preparation for modular sudo.
This commit is contained in:
Todd C. Miller
282
src/term.c
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282
src/term.c
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/*
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* Copyright (c) 2009 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <config.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <stdio.h>
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#ifdef STDC_HEADERS
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# include <stdlib.h>
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# include <stddef.h>
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#else
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# ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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# endif
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#endif /* STDC_HEADERS */
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#ifdef HAVE_STRING_H
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# if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
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# include <memory.h>
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# endif
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# include <string.h>
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#else
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# ifdef HAVE_STRINGS_H
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# include <strings.h>
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# endif
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#endif /* HAVE_STRING_H */
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#ifdef HAVE_TERMIOS_H
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# include <termios.h>
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#else
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# ifdef HAVE_TERMIO_H
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# include <termio.h>
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# else
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# include <sgtty.h>
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# include <sys/ioctl.h>
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# endif /* HAVE_TERMIO_H */
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#endif /* HAVE_TERMIOS_H */
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#include "sudo.h"
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#ifndef TCSASOFT
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# define TCSASOFT 0
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#endif
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#ifndef ECHONL
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# define ECHONL 0
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#endif
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#ifndef IEXTEN
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# define IEXTEN 0
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#endif
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#ifndef IUCLC
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# define IUCLC 0
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#endif
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#ifndef _POSIX_VDISABLE
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# ifdef VDISABLE
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# define _POSIX_VDISABLE VDISABLE
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# else
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# define _POSIX_VDISABLE 0
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# endif
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#endif
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/*
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* Compat macros for non-termios systems.
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*/
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#ifndef HAVE_TERMIOS_H
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# ifdef HAVE_TERMIO_H
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# undef termios
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# define termios termio
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# define tcgetattr(f, t) ioctl(f, TCGETA, t)
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# define tcsetattr(f, a, t) ioctl(f, a, t)
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# undef TCSAFLUSH
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# define TCSAFLUSH TCSETAF
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# undef TCSADRAIN
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# define TCSADRAIN TCSETAW
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# else /* SGTTY */
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# undef termios
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# define termios sgttyb
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# define c_lflag sg_flags
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# define tcgetattr(f, t) ioctl(f, TIOCGETP, t)
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# define tcsetattr(f, a, t) ioctl(f, a, t)
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# undef TCSAFLUSH
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# define TCSAFLUSH TIOCSETP
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# undef TCSADRAIN
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# define TCSADRAIN TIOCSETN
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# endif /* HAVE_TERMIO_H */
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#endif /* HAVE_TERMIOS_H */
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typedef struct termios sudo_term_t;
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static sudo_term_t term, oterm;
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static int changed;
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int term_erase;
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int term_kill;
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int
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term_restore(fd, flush)
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int fd;
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int flush;
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{
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if (changed) {
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int flags = TCSASOFT;
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flags |= flush ? TCSAFLUSH : TCSADRAIN;
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if (tcsetattr(fd, flags, &oterm) != 0)
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return(0);
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changed = 0;
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}
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return(1);
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}
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int
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term_noecho(fd)
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int fd;
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{
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if (!changed && tcgetattr(fd, &oterm) != 0)
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return(0);
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(void) memcpy(&term, &oterm, sizeof(term));
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CLR(term.c_lflag, ECHO|ECHONL);
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#ifdef VSTATUS
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term.c_cc[VSTATUS] = _POSIX_VDISABLE;
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#endif
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if (tcsetattr(fd, TCSADRAIN|TCSASOFT, &term) == 0) {
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changed = 1;
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return(1);
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}
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return(0);
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}
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#if defined(HAVE_TERMIOS_H) || defined(HAVE_TERMIO_H)
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int
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term_raw(fd, opost, isig)
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int fd;
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int opost;
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int isig;
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{
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struct termios term;
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if (!changed && tcgetattr(fd, &oterm) != 0)
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return(0);
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(void) memcpy(&term, &oterm, sizeof(term));
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/* Set terminal to raw mode */
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term.c_cc[VMIN] = 1;
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term.c_cc[VTIME] = 0;
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CLR(term.c_lflag, ECHO | ECHONL | ICANON | ISIG | IEXTEN);
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if (isig)
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SET(term.c_lflag, ISIG);
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CLR(term.c_iflag, ICRNL | IGNCR | INLCR | IUCLC | IXON);
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/* Only retain output post-processing opost flag set. */
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if (!opost)
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CLR(term.c_oflag, OPOST);
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if (tcsetattr(fd, TCSADRAIN|TCSASOFT, &term) == 0) {
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changed = 1;
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return(1);
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}
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return(0);
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}
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int
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term_cbreak(fd)
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int fd;
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{
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if (!changed && tcgetattr(fd, &oterm) != 0)
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return(0);
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(void) memcpy(&term, &oterm, sizeof(term));
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/* Set terminal to half-cooked mode */
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term.c_cc[VMIN] = 1;
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term.c_cc[VTIME] = 0;
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CLR(term.c_lflag, ECHO | ECHONL | ICANON | IEXTEN);
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SET(term.c_lflag, ISIG);
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#ifdef VSTATUS
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term.c_cc[VSTATUS] = _POSIX_VDISABLE;
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#endif
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if (tcsetattr(fd, TCSADRAIN|TCSASOFT, &term) == 0) {
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term_erase = term.c_cc[VERASE];
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term_kill = term.c_cc[VKILL];
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changed = 1;
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return(1);
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}
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return(0);
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}
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int
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term_copy(src, dst, opost)
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int src;
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int dst;
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int opost;
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{
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struct termios tt;
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if (tcgetattr(src, &tt) != 0)
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return(0);
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/* Do not do post-processing unless opost set. */
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if (!opost)
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CLR(tt.c_oflag, OPOST);
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/* XXX - add TCSANOW compat define */
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if (tcsetattr(dst, TCSANOW|TCSASOFT, &tt) != 0)
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return(0);
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return(1);
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}
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#else /* SGTTY */
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int
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term_raw(fd, onlcr)
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int fd;
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int onlcr;
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{
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if (!changed && ioctl(fd, TIOCGETP, &oterm) != 0)
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return(0);
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(void) memcpy(&term, &oterm, sizeof(term));
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/* Set terminal to raw mode */
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CLR(term.c_lflag, ECHO);
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SET(term.sg_flags, RAW);
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/* Retain NL to NLCR conversion if onlcr flag set. */
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if (onlcr)
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SET(term.sg_flags, CRMOD);
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if (ioctl(fd, TIOCSETP, &term) == 0) {
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changed = 1;
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return(1);
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}
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return(0);
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}
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int
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term_cbreak(fd)
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int fd;
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{
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if (!changed && ioctl(fd, TIOCGETP, &oterm) != 0)
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return(0);
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(void) memcpy(&term, &oterm, sizeof(term));
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/* Set terminal to half-cooked mode */
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CLR(term.c_lflag, ECHO);
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SET(term.sg_flags, CBREAK);
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if (ioctl(fd, TIOCSETP, &term) == 0) {
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term_erase = term.sg_erase;
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term_kill = term.sg_kill;
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changed = 1;
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return(1);
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}
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return(0);
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}
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int
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term_copy(src, dst, onlcr)
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int src;
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int dst;
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int onlcr;
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{
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struct sgttyb b;
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struct tchars tc;
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struct ltchars lc;
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int l, lb;
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if (ioctl(src, TIOCGETP, &b) != 0 || ioctl(src, TIOCGETC, &tc) != 0 ||
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ioctl(src, TIOCGETD, &l) != 0 || ioctl(src, TIOCGLTC, &lc) != 0 ||
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ioctl(src, TIOCLGET, &lb)) {
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return(0);
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}
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/* Do not convert line endings from NL to NLCR. */
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if (!onlcr)
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CLR(b.sg_flags, CRMOD);
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if (ioctl(dst, TIOCSETP, &b) != 0 || ioctl(dst, TIOCSETC, &tc) != 0 ||
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ioctl(dst, TIOCSLTC, &lc) != 0 || ioctl(dst, TIOCLSET, &lb) != 0 ||
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ioctl(dst, TIOCSETD, &l) != 0) {
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return(0);
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}
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return(1);
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}
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#endif
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