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/*-
* Copyright (c) 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char sccsid[] = "@(#)ex_util.c 8.14 (Berkeley) 8/17/94";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <bitstring.h>
#include <errno.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include "compat.h"
#include <db.h>
#include <regex.h>
#include "vi.h"
#include "excmd.h"
/*
* ex_getline --
* Return a line from the terminal.
*/
int
ex_getline(sp, fp, lenp)
SCR *sp;
FILE *fp;
size_t *lenp;
{
EX_PRIVATE *exp;
size_t off;
int ch;
char *p;
exp = EXP(sp);
for (errno = 0, off = 0, p = exp->ibp;;) {
if (off >= exp->ibp_len) {
BINC_RET(sp, exp->ibp, exp->ibp_len, off + 1);
p = exp->ibp + off;
}
if ((ch = getc(fp)) == EOF && !feof(fp)) {
if (errno == EINTR) {
errno = 0;
clearerr(fp);
continue;
}
return (1);
}
if (ch == EOF || ch == '\n') {
if (ch == EOF && !off)
return (1);
*lenp = off;
return (0);
}
*p++ = ch;
++off;
}
/* NOTREACHED */
}
/*
* ex_sleave --
* Save the terminal/signal state, screen modification time.
* Specific to ex/filter.c and ex/ex_shell.c.
*/
int
ex_sleave(sp)
SCR *sp;
{
struct stat sb;
EX_PRIVATE *exp;
/* Ignore sessions not using tty's. */
if (!F_ISSET(sp->gp, G_STDIN_TTY))
return (1);
exp = EXP(sp);
if (tcgetattr(STDIN_FILENO, &exp->leave_term)) {
msgq(sp, M_SYSERR, "tcgetattr");
return (1);
}
if (tcsetattr(STDIN_FILENO,
TCSANOW | TCSASOFT, &sp->gp->original_termios)) {
msgq(sp, M_SYSERR, "tcsetattr");
return (1);
}
/*
* The process may write to the terminal. Save the access time
* (read) and modification time (write) of the tty; if they have
* changed when we restore the modes, will have to refresh the
* screen.
*/
if (fstat(STDIN_FILENO, &sb)) {
msgq(sp, M_SYSERR, "stat: stdin");
exp->leave_atime = exp->leave_mtime = 0;
} else {
exp->leave_atime = sb.st_atime;
exp->leave_mtime = sb.st_mtime;
}
return (0);
}
/*
* ex_rleave --
* Return the terminal/signal state, not screen modification time.
* Specific to ex/filter.c and ex/ex_shell.c.
*/
void
ex_rleave(sp)
SCR *sp;
{
EX_PRIVATE *exp;
struct stat sb;
exp = EXP(sp);
/* Restore the terminal modes. */
if (tcsetattr(STDIN_FILENO, TCSANOW | TCSASOFT, &exp->leave_term))
msgq(sp, M_SYSERR, "tcsetattr");
/* If the terminal was used, refresh the screen. */
if (fstat(STDIN_FILENO, &sb) || exp->leave_atime == 0 ||
exp->leave_atime != sb.st_atime || exp->leave_mtime != sb.st_mtime)
F_SET(sp, S_REFRESH);
}
/*
* ex_ncheck --
* Check for more files to edit.
*/
int
ex_ncheck(sp, force)
SCR *sp;
int force;
{
/*
* !!!
* Historic practice: quit! or two quit's done in succession
* (where ZZ counts as a quit) didn't check for other files.
*/
if (!force && sp->ccnt != sp->q_ccnt + 1 &&
sp->cargv != NULL && sp->cargv[1] != NULL) {
sp->q_ccnt = sp->ccnt;
msgq(sp, M_ERR,
"More files to edit; use n[ext] to go to the next file, q[uit]! to quit");
return (1);
}
return (0);
}
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