more.c (49,27 KB)
/*
* Copyright (C) 1980 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not 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 MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
/* more.c - General purpose tty output filter and file perusal program
*
* by Eric Shienbrood, UC Berkeley
*
* modified by Geoff Peck
* UCB to add underlining, single spacing
* modified by John Foderaro
* UCB to add -c and MORE environment variable
* modified by Erik Troan <ewt@redhat.com>
* to be more posix and so compile on linux/axp.
* modified by Kars de Jong <jongk@cs.utwente.nl>
* to use terminfo instead of termcap.
* 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
* added Native Language Support
* 1999-03-19 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
* more nls translatable strings
* 1999-05-09 aeb
* applied a RedHat patch (setjmp->sigsetjmp); without it a second
* ^Z would fail.
* 1999-05-09 aeb
* undone Kars' work, so that more works without libcurses (and
* hence can be in /bin with libcurses being in
* /usr/lib which may not be mounted). However, when termcap is not
* present curses can still be used.
* 2010-10-21 Davidlohr Bueso <dave@gnu.org>
* modified mem allocation handling for util-linux
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h> /* for alloca() */
#include <stdarg.h> /* for va_start() etc */
#include <sys/param.h>
#include <ctype.h>
#include <signal.h>
#include <errno.h>
#include <fcntl.h>
#include <termios.h>
#include <setjmp.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/wait.h>
#include "strutils.h"
#include "nls.h"
#include "xalloc.h"
#include "widechar.h"
#include "closestream.h"
#include <regex.h>
#ifdef TEST_PROGRAM
# define NON_INTERACTIVE_MORE 1
#endif
#ifndef XTABS
# define XTABS TAB3
#endif
#define VI "vi" /* found on the user's path */
#define Fopen(s,m) (Currline = 0,file_pos=0,fopen(s,m))
#define Ftell(f) file_pos
#define Fseek(f,off) (file_pos=off,fseek(f,off,0))
#define Getc(f) (++file_pos, getc(f))
#define Ungetc(c,f) (--file_pos, ungetc(c,f))
#define putcerr(c) fputc(c, stderr)
#define putserr(s) fputs(s, stderr)
#define putsout(s) fputs(s, stdout)
#define stty(fd,argp) tcsetattr(fd,TCSANOW,argp)
/* some function declarations */
void initterm(void);
void kill_line(void);
void doclear(void);
void cleareol(void);
void clreos(void);
void home(void);
void more_error(char *mess);
void do_shell(char *filename);
int colon(char *filename, int cmd, int nlines);
int expand(char **outbuf, char *inbuf);
void argscan(char *s);
void rdline(register FILE *f);
void copy_file(register FILE *f);
void search(char buf[], FILE *file, register int n);
void skipf(register int nskip);
void skiplns(register int n, register FILE *f);
void screen(register FILE *f, register int num_lines);
int command(char *filename, register FILE *f);
void erasep(register int col);
void show(register char ch);
void set_tty(void);
void reset_tty(void);
void ttyin(char buf[], register int nmax, char pchar);
int number(char *cmd);
int readch(void);
int get_line(register FILE *f, int *length);
void prbuf(register char *s, register int n);
void execute(char *filename, char *cmd, ...);
FILE *checkf(char *, int *);
void prepare_line_buffer(void);
#define TBUFSIZ 1024
#define LINSIZ 256 /* minimal Line buffer size */
#define ctrl(letter) (letter & 077)
#define RUBOUT '\177'
#define ESC '\033'
#define QUIT '\034'
#define SCROLL_LEN 11
#define LINES_PER_PAGE 24
#define NUM_COLUMNS 80
#define TERMINAL_BUF 4096
#define INIT_BUF 80
#define SHELL_LINE 1000
#define COMMAND_BUF 200
#define REGERR_BUF NUM_COLUMNS
struct termios otty, savetty0;
long file_pos, file_size;
int fnum, no_intty, no_tty, slow_tty;
int dum_opt, dlines;
void onquit(int), onsusp(int), chgwinsz(int), end_it(int);
int nscroll = SCROLL_LEN; /* Number of lines scrolled by 'd' */
int fold_opt = 1; /* Fold long lines */
int stop_opt = 1; /* Stop after form feeds */
int ssp_opt = 0; /* Suppress white space */
int ul_opt = 1; /* Underline as best we can */
int promptlen;
int Currline; /* Line we are currently at */
int startup = 1;
int firstf = 1;
int notell = 1;
int docrterase = 0;
int docrtkill = 0;
int bad_so; /* True if overwriting does not turn
off standout */
int inwait, Pause, errors;
int within; /* true if we are within a file,
false if we are between files */
int hard, dumb, noscroll, hardtabs, clreol, eatnl;
int catch_susp; /* We should catch the SIGTSTP signal */
char **fnames; /* The list of file names */
int nfiles; /* Number of files left to process */
char *shell; /* The name of the shell to use */
int shellp; /* A previous shell command exists */
sigjmp_buf restore;
char *Line; /* Line buffer */
size_t LineLen; /* size of Line buffer */
int Lpp = LINES_PER_PAGE; /* lines per page */
char *Clear; /* clear screen */
char *eraseln; /* erase line */
char *Senter, *Sexit; /* enter and exit standout mode */
char *ULenter, *ULexit; /* enter and exit underline mode */
char *chUL; /* underline character */
char *chBS; /* backspace character */
char *Home; /* go to home */
char *cursorm; /* cursor movement */
char cursorhome[40]; /* contains cursor movement to home */
char *EodClr; /* clear rest of screen */
int Mcol = NUM_COLUMNS; /* number of columns */
int Wrap = 1; /* set if automargins */
int soglitch; /* terminal has standout mode glitch */
int ulglitch; /* terminal has underline mode glitch */
int pstate = 0; /* current UL state */
static int magic(FILE *, char *);
char *previousre; /* previous search() buf[] item */
struct {
long chrctr, line;
} context, screen_start;
extern char PC; /* pad character */
#ifdef HAVE_NCURSES_H
# include <ncurses.h>
#elif defined(HAVE_NCURSES_NCURSES_H)
# include <ncurses/ncurses.h>
#endif
#if defined(HAVE_NCURSES_H) || defined(HAVE_NCURSES_NCURSES_H)
# include <term.h> /* include after <curses.h> */
# define TERM_AUTO_RIGHT_MARGIN "am"
# define TERM_CEOL "xhp"
# define TERM_CLEAR "clear"
# define TERM_CLEAR_TO_LINE_END "el"
# define TERM_CLEAR_TO_SCREEN_END "ed"
# define TERM_COLS "cols"
# define TERM_CURSOR_ADDRESS "cup"
# define TERM_EAT_NEW_LINE "xenl"
# define TERM_ENTER_UNDERLINE "smul"
# define TERM_EXIT_STANDARD_MODE "rmso"
# define TERM_EXIT_UNDERLINE "rmul"
# define TERM_HARD_COPY "hc"
# define TERM_HOME "home"
# define TERM_LINE_DOWN "cud1"
# define TERM_LINES "lines"
# define TERM_OVER_STRIKE "os"
# define TERM_PAD_CHAR "pad"
# define TERM_STANDARD_MODE "smso"
# define TERM_STD_MODE_GLITCH "xmc"
# define TERM_UNDERLINE_CHAR "uc"
# define TERM_UNDERLINE "ul"
static void my_putstring(char *s)
{
tputs(s, fileno(stdout), putchar); /* putp(s); */
}
static void my_setupterm(char *term, int fildes, int *errret)
{
setupterm(term, fildes, errret);
}
static int my_tgetnum(char *s)
{
return tigetnum(s);
}
static int my_tgetflag(char *s)
{
return tigetflag(s);
}
static char *my_tgetstr(char *s)
{
return tigetstr(s);
}
static char *my_tgoto(char *cap, int col, int row)
{
return tparm(cap, col, row);
}
#elif defined(HAVE_LIBTERMCAP) /* ncurses not found */
# include <termcap.h>
# define TERM_AUTO_RIGHT_MARGIN "am"
# define TERM_CEOL "xs"
# define TERM_CLEAR "cl"
# define TERM_CLEAR_TO_LINE_END "ce"
# define TERM_CLEAR_TO_SCREEN_END "cd"
# define TERM_COLS "co"
# define TERM_CURSOR_ADDRESS "cm"
# define TERM_EAT_NEW_LINE "xn"
# define TERM_ENTER_UNDERLINE "us"
# define TERM_EXIT_STANDARD_MODE "se"
# define TERM_EXIT_UNDERLINE "ue"
# define TERM_HARD_COPY "hc"
# define TERM_HOME "ho"
# define TERM_LINE_DOWN "le"
# define TERM_LINES "li"
# define TERM_OVER_STRIKE "os"
# define TERM_PAD_CHAR "pc"
# define TERM_STANDARD_MODE "so"
# define TERM_STD_MODE_GLITCH "sg"
# define TERM_UNDERLINE_CHAR "uc"
# define TERM_UNDERLINE "ul"
char termbuffer[TERMINAL_BUF];
char tcbuffer[TERMINAL_BUF];
char *strbuf = termbuffer;
static void my_putstring(char *s)
{
tputs(s, fileno(stdout), putchar);
}
static void my_setupterm(char *term, int fildes __attribute__((__unused__)), int *errret)
{
*errret = tgetent(tcbuffer, term);
}
static int my_tgetnum(char *s)
{
return tgetnum(s);
}
static int my_tgetflag(char *s)
{
return tgetflag(s);
}
static char *my_tgetstr(char *s)
{
return tgetstr(s, &strbuf);
}
static char *my_tgoto(char *cap, int col, int row)
{
return tgoto(cap, col, row);
}
#endif /* HAVE_LIBTERMCAP */
static void __attribute__((__noreturn__)) usage(FILE *out)
{
fputs(USAGE_HEADER, out);
fprintf(out, _(" %s [options] <file>...\n"), program_invocation_short_name);
fputs(USAGE_SEPARATOR, out);
fputs(_("A file perusal filter for CRT viewing.\n"), out);
fputs(USAGE_OPTIONS, out);
fputs(_(" -d display help instead of ringing bell\n"), out);
fputs(_(" -f count logical rather than screen lines\n"), out);
fputs(_(" -l suppress pause after form feed\n"), out);
fputs(_(" -c do not scroll, display text and clean line ends\n"), out);
fputs(_(" -p do not scroll, clean screen and display text\n"), out);
fputs(_(" -s squeeze multiple blank lines into one\n"), out);
fputs(_(" -u suppress underlining\n"), out);
fputs(_(" -<number> the number of lines per screenful\n"), out);
fputs(_(" +<number> display file beginning from line number\n"), out);
fputs(_(" +/<string> display file beginning from search string match\n"), out);
fputs(_(" -V display version information and exit\n"), out);
fprintf(out, USAGE_MAN_TAIL("more(1)"));
exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
}
int main(int argc, char **argv)
{
FILE *f;
char *s;
int ch;
int left;
int prnames = 0;
int initopt = 0;
int srchopt = 0;
int clearit = 0;
int initline = 0;
char *initbuf = NULL;
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
nfiles = argc;
fnames = argv;
setlocale(LC_ALL, "");
initterm();
/* Auto set no scroll on when binary is called page */
if (!(strcmp(program_invocation_short_name, "page")))
noscroll++;
prepare_line_buffer();
nscroll = Lpp / 2 - 1;
if (nscroll <= 0)
nscroll = 1;
if ((s = getenv("MORE")) != NULL)
argscan(s);
while (--nfiles > 0) {
if ((ch = (*++fnames)[0]) == '-') {
argscan(*fnames + 1);
} else if (ch == '+') {
s = *fnames;
if (*++s == '/') {
srchopt++;
initbuf = xstrdup(s + 1);
} else {
initopt++;
for (initline = 0; *s != '\0'; s++)
if (isdigit(*s))
initline =
initline * 10 + *s - '0';
--initline;
}
} else
break;
}
/* allow clreol only if Home and eraseln and EodClr strings are
* defined, and in that case, make sure we are in noscroll mode */
if (clreol) {
if ((Home == NULL) || (*Home == '\0') ||
(eraseln == NULL) || (*eraseln == '\0') ||
(EodClr == NULL) || (*EodClr == '\0'))
clreol = 0;
else
noscroll = 1;
}
if (dlines == 0)
dlines = Lpp - 1; /* was: Lpp - (noscroll ? 1 : 2) */
left = dlines;
if (nfiles > 1)
prnames++;
if (!no_intty && nfiles == 0)
usage(stderr);
else
f = stdin;
if (!no_tty) {
signal(SIGQUIT, onquit);
signal(SIGINT, end_it);
#ifdef SIGWINCH
signal(SIGWINCH, chgwinsz);
#endif
if (signal(SIGTSTP, SIG_IGN) == SIG_DFL) {
signal(SIGTSTP, onsusp);
catch_susp++;
}
stty(fileno(stderr), &otty);
}
if (no_intty) {
if (no_tty)
copy_file(stdin);
else {
if ((ch = Getc(f)) == '\f')
doclear();
else {
Ungetc(ch, f);
if (noscroll && (ch != EOF)) {
if (clreol)
home();
else
doclear();
}
}
if (srchopt) {
free(previousre);
previousre = xstrdup(initbuf);
search(initbuf, stdin, 1);
if (noscroll)
left--;
} else if (initopt)
skiplns(initline, stdin);
screen(stdin, left);
}
no_intty = 0;
prnames++;
firstf = 0;
}
while (fnum < nfiles) {
if ((f = checkf(fnames[fnum], &clearit)) != NULL) {
context.line = context.chrctr = 0;
Currline = 0;
if (firstf)
sigsetjmp(restore, 1);
if (firstf) {
firstf = 0;
if (srchopt) {
free(previousre);
previousre = xstrdup(initbuf);
search(initbuf, f, 1);
if (noscroll)
left--;
} else if (initopt)
skiplns(initline, f);
} else if (fnum < nfiles && !no_tty) {
sigsetjmp(restore, 1);
left = command(fnames[fnum], f);
}
if (left != 0) {
if ((noscroll || clearit)
&& (file_size != LONG_MAX)) {
if (clreol)
home();
else
doclear();
}
if (prnames) {
if (bad_so)
erasep(0);
if (clreol)
cleareol();
putsout("::::::::::::::");
if (promptlen > 14)
erasep(14);
putchar('\n');
if (clreol)
cleareol();
puts(fnames[fnum]);
if (clreol)
cleareol();
puts("::::::::::::::");
if (left > Lpp - 4)
left = Lpp - 4;
}
if (no_tty)
copy_file(f);
else {
within++;
screen(f, left);
within = 0;
}
}
sigsetjmp(restore, 1);
fflush(stdout);
fclose(f);
screen_start.line = screen_start.chrctr = 0L;
context.line = context.chrctr = 0L;
}
fnum++;
firstf = 0;
}
free(previousre);
free(initbuf);
free(Line);
reset_tty();
exit(EXIT_SUCCESS);
}
void argscan(char *s)
{
int seen_num = 0;
while (*s != '\0') {
switch (*s) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
if (!seen_num) {
dlines = 0;
seen_num = 1;
}
dlines = dlines * 10 + *s - '0';
break;
case 'd':
dum_opt = 1;
break;
case 'l':
stop_opt = 0;
break;
case 'f':
fold_opt = 0;
break;
case 'p':
noscroll++;
break;
case 'c':
clreol++;
break;
case 's':
ssp_opt = 1;
break;
case 'u':
ul_opt = 0;
break;
case '-':
case ' ':
case '\t':
break;
case 'V':
printf(UTIL_LINUX_VERSION);
exit(EXIT_SUCCESS);
break;
default:
warnx(_("unknown option -%s"), s);
usage(stderr);
break;
}
s++;
}
}
/* Check whether the file named by fs is an ASCII file which the user may
* access. If it is, return the opened file. Otherwise return NULL. */
FILE *checkf(register char *fs, int *clearfirst)
{
struct stat stbuf;
register FILE *f;
int c;
if (stat(fs, &stbuf) == -1) {
fflush(stdout);
if (clreol)
cleareol();
warn(_("stat of %s failed"), fs);
return ((FILE *)NULL);
}
if ((stbuf.st_mode & S_IFMT) == S_IFDIR) {
printf(_("\n*** %s: directory ***\n\n"), fs);
return ((FILE *)NULL);
}
if ((f = Fopen(fs, "r")) == NULL) {
fflush(stdout);
warn(_("cannot open %s"), fs);
return ((FILE *)NULL);
}
if (magic(f, fs)) {
fclose(f);
return ((FILE *)NULL);
}
fcntl(fileno(f), F_SETFD, FD_CLOEXEC);
c = Getc(f);
*clearfirst = (c == '\f');
Ungetc(c, f);
if ((file_size = stbuf.st_size) == 0)
file_size = LONG_MAX;
return (f);
}
/* magic --
* check for file magic numbers. This code would best be shared
* with the file(1) program or, perhaps, more should not try to be
* so smart. */
static int magic(FILE *f, char *fs)
{
signed char twobytes[2];
/* don't try to look ahead if the input is unseekable */
if (fseek(f, 0L, SEEK_SET))
return 0;
if (fread(twobytes, 2, 1, f) == 1) {
switch (twobytes[0] + (twobytes[1] << 8)) {
case 0407: /* a.out obj */
case 0410: /* a.out exec */
case 0413: /* a.out demand exec */
case 0405:
case 0411:
case 0177545:
case 0x457f: /* simple ELF detection */
printf(_("\n******** %s: Not a text file ********\n\n"),
fs);
return 1;
}
}
fseek(f, 0L, SEEK_SET); /* rewind() not necessary */
return 0;
}
/* Print out the contents of the file f, one screenful at a time. */
#define STOP -10
void screen(register FILE *f, register int num_lines)
{
register int c;
register int nchars;
int length; /* length of current line */
static int prev_len = 1; /* length of previous line */
for (;;) {
while (num_lines > 0 && !Pause) {
if ((nchars = get_line(f, &length)) == EOF) {
if (clreol)
clreos();
return;
}
if (ssp_opt && length == 0 && prev_len == 0)
continue;
prev_len = length;
if (bad_so
|| ((Senter && *Senter == ' ') && (promptlen > 0)))
erasep(0);
/* must clear before drawing line since tabs on
* some terminals do not erase what they tab
* over. */
if (clreol)
cleareol();
prbuf(Line, length);
if (nchars < promptlen)
erasep(nchars); /* erasep () sets promptlen to 0 */
else
promptlen = 0;
/* is this needed?
* if (clreol)
* cleareol(); * must clear again in case we wrapped *
*/
if (nchars < Mcol || !fold_opt)
prbuf("\n", 1); /* will turn off UL if necessary */
if (nchars == STOP)
break;
num_lines--;
}
if (pstate) {
my_putstring(ULexit);
pstate = 0;
}
fflush(stdout);
if ((c = Getc(f)) == EOF) {
if (clreol)
clreos();
return;
}
if (Pause && clreol)
clreos();
Ungetc(c, f);
sigsetjmp(restore, 1);
Pause = 0;
startup = 0;
if ((num_lines = command(NULL, f)) == 0)
return;
if (hard && promptlen > 0)
erasep(0);
if (noscroll && num_lines >= dlines) {
if (clreol)
home();
else
doclear();
}
screen_start.line = Currline;
screen_start.chrctr = Ftell(f);
}
}
/* Come here if a quit signal is received */
void onquit(int dummy __attribute__((__unused__)))
{
signal(SIGQUIT, SIG_IGN);
if (!inwait) {
putchar('\n');
if (!startup) {
signal(SIGQUIT, onquit);
siglongjmp(restore, 1);
} else
Pause++;
} else if (!dum_opt && notell) {
promptlen += fprintf(stderr, _("[Use q or Q to quit]"));
notell = 0;
}
signal(SIGQUIT, onquit);
}
/* Come here if a signal for a window size change is received */
#ifdef SIGWINCH
void chgwinsz(int dummy __attribute__((__unused__)))
{
struct winsize win;
signal(SIGWINCH, SIG_IGN);
if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1) {
if (win.ws_row != 0) {
Lpp = win.ws_row;
nscroll = Lpp / 2 - 1;
if (nscroll <= 0)
nscroll = 1;
dlines = Lpp - 1; /* was: Lpp - (noscroll ? 1 : 2) */
}
if (win.ws_col != 0)
Mcol = win.ws_col;
}
signal(SIGWINCH, chgwinsz);
}
#endif /* SIGWINCH */
/* Clean up terminal state and exit. Also come here if interrupt signal received */
void __attribute__((__noreturn__)) end_it(int dummy __attribute__((__unused__)))
{
reset_tty();
if (clreol) {
putchar('\r');
clreos();
fflush(stdout);
} else if (!clreol && (promptlen > 0)) {
kill_line();
fflush(stdout);
} else
putcerr('\n');
free(previousre);
free(Line);
_exit(EXIT_SUCCESS);
}
void copy_file(register FILE *f)
{
char buf[BUFSIZ];
size_t sz;
while ((sz = fread(&buf, sizeof(char), sizeof(buf), f)) > 0)
fwrite(&buf, sizeof(char), sz, stdout);
}
#define ringbell() putcerr('\007')
static void prompt(char *filename)
{
if (clreol)
cleareol();
else if (promptlen > 0)
kill_line();
if (!hard) {
promptlen = 0;
if (Senter && Sexit) {
my_putstring(Senter);
promptlen += (2 * soglitch);
}
if (clreol)
cleareol();
promptlen += printf(_("--More--"));
if (filename != NULL) {
promptlen += printf(_("(Next file: %s)"), filename);
} else if (!no_intty) {
promptlen +=
printf("(%d%%)",
(int)((file_pos * 100) / file_size));
}
if (dum_opt) {
promptlen +=
printf(_("[Press space to continue, 'q' to quit.]"));
}
if (Senter && Sexit)
my_putstring(Sexit);
if (clreol)
clreos();
fflush(stdout);
} else
ringbell();
inwait++;
}
void prepare_line_buffer(void)
{
char *nline;
size_t nsz = Mcol * 4;
if (LineLen >= nsz)
return;
if (nsz < LINSIZ)
nsz = LINSIZ;
/* alloc nsz and extra space for \n\0 */
nline = xrealloc(Line, nsz + 2);
Line = nline;
LineLen = nsz;
}
/* Get a logical line */
int get_line(register FILE *f, int *length)
{
int c;
char *p;
int column;
static int colflg;
#ifdef HAVE_WIDECHAR
size_t i;
wchar_t wc;
int wc_width;
mbstate_t state, state_bak; /* Current status of the stream. */
char mbc[MB_LEN_MAX]; /* Buffer for one multibyte char. */
size_t mblength; /* Byte length of multibyte char. */
size_t mbc_pos = 0; /* Position of the MBC. */
int use_mbc_buffer_flag = 0; /* If 1, mbc has data. */
int break_flag = 0; /* If 1, exit while(). */
long file_pos_bak = Ftell(f);
memset(&state, '\0', sizeof(mbstate_t));
#endif
prepare_line_buffer();
p = Line;
column = 0;
c = Getc(f);
if (colflg && c == '\n') {
Currline++;
c = Getc(f);
}
while (p < &Line[LineLen - 1]) {
#ifdef HAVE_WIDECHAR
if (fold_opt && use_mbc_buffer_flag && MB_CUR_MAX > 1) {
use_mbc_buffer_flag = 0;
state_bak = state;
mbc[mbc_pos++] = c;
process_mbc:
mblength = mbrtowc(&wc, mbc, mbc_pos, &state);
switch (mblength) {
case (size_t)-2: /* Incomplete multibyte character. */
use_mbc_buffer_flag = 1;
state = state_bak;
break;
case (size_t)-1: /* Invalid as a multibyte character. */
*p++ = mbc[0];
state = state_bak;
column++;
file_pos_bak++;
if (column >= Mcol) {
Fseek(f, file_pos_bak);
} else {
memmove(mbc, mbc + 1, --mbc_pos);
if (mbc_pos > 0) {
mbc[mbc_pos] = '\0';
goto process_mbc;
}
}
break;
default:
wc_width = wcwidth(wc);
if (column + wc_width > Mcol) {
Fseek(f, file_pos_bak);
break_flag = 1;
} else {
for (i = 0; p < &Line[LineLen - 1] &&
i < mbc_pos; i++)
*p++ = mbc[i];
if (wc_width > 0)
column += wc_width;
}
}
if (break_flag || column >= Mcol)
break;
c = Getc(f);
continue;
}
#endif /* HAVE_WIDECHAR */
if (c == EOF) {
if (p > Line) {
*p = '\0';
*length = p - Line;
return (column);
}
*length = p - Line;
return (EOF);
}
if (c == '\n') {
Currline++;
break;
}
*p++ = c;
#if 0
if (c == '\033') { /* ESC */
c = Getc(f);
while (c > ' ' && c < '0' && p < &Line[LineLen - 1]) {
*p++ = c;
c = Getc(f);
}
if (c >= '0' && c < '\177' && p < &Line[LineLen - 1]) {
*p++ = c;
c = Getc(f);
continue;
}
}
#endif /* 0 */
if (c == '\t') {
if (!hardtabs || (column < promptlen && !hard)) {
if (hardtabs && eraseln && !dumb) {
column = 1 + (column | 7);
my_putstring(eraseln);
promptlen = 0;
} else {
for (--p; p < &Line[LineLen - 1];) {
*p++ = ' ';
if ((++column & 7) == 0)
break;
}
if (column >= promptlen)
promptlen = 0;
}
} else
column = 1 + (column | 7);
} else if (c == '\b' && column > 0) {
column--;
} else if (c == '\r') {
int next = Getc(f);
if (next == '\n') {
p--;
Currline++;
break;
}
Ungetc(next, f);
column = 0;
} else if (c == '\f' && stop_opt) {
p[-1] = '^';
*p++ = 'L';
column += 2;
Pause++;
} else if (c == EOF) {
*length = p - Line;
return (column);
} else {
#ifdef HAVE_WIDECHAR
if (fold_opt && MB_CUR_MAX > 1) {
memset(mbc, '\0', MB_LEN_MAX);
mbc_pos = 0;
mbc[mbc_pos++] = c;
state_bak = state;
mblength = mbrtowc(&wc, mbc, mbc_pos, &state);
/* The value of mblength is always less than 2 here. */
switch (mblength) {
case (size_t)-2:
p--;
file_pos_bak = Ftell(f) - 1;
state = state_bak;
use_mbc_buffer_flag = 1;
break;
case (size_t)-1:
state = state_bak;
column++;
break;
default:
wc_width = wcwidth(wc);
if (wc_width > 0)
column += wc_width;
}
} else
#endif /* HAVE_WIDECHAR */
{
if (isprint(c))
column++;
}
}
if (column >= Mcol && fold_opt)
break;
#ifdef HAVE_WIDECHAR
if (use_mbc_buffer_flag == 0 && p >= &Line[LineLen - 1 - 4])
/* don't read another char if there is no space for
* whole multibyte sequence */
break;
#endif
c = Getc(f);
}
if (column >= Mcol && Mcol > 0) {
if (!Wrap) {
*p++ = '\n';
}
}
colflg = column == Mcol && fold_opt;
if (colflg && eatnl && Wrap) {
*p++ = '\n'; /* simulate normal wrap */
}
*length = p - Line;
*p = 0;
return (column);
}
/* Erase the rest of the prompt, assuming we are starting at column col. */
void erasep(register int col)
{
if (promptlen == 0)
return;
if (hard) {
putchar('\n');
} else {
if (col == 0)
putchar('\r');
if (!dumb && eraseln)
my_putstring(eraseln);
else
printf("%*s", promptlen - col, "");
}
promptlen = 0;
}
/* Erase the current line entirely */
void kill_line(void)
{
erasep(0);
if (!eraseln || dumb)
putchar('\r');
}
/* force clear to end of line */
void cleareol(void)
{
my_putstring(eraseln);
}
void clreos(void)
{
my_putstring(EodClr);
}
static UL_ASAN_BLACKLIST size_t xmbrtowc(wchar_t *wc, const char *s, size_t n,
mbstate_t *mbstate)
{
const size_t mblength = mbrtowc(wc, s, n, mbstate);
if (mblength == (size_t)-2 || mblength == (size_t)-1)
return 1;
return mblength;
}
/* Print a buffer of n characters */
void prbuf(register char *s, register int n)
{
register char c; /* next output character */
register int state; /* next output char's UL state */
#define wouldul(s,n) ((n) >= 2 && (((s)[0] == '_' && (s)[1] == '\b') || ((s)[1] == '\b' && (s)[2] == '_')))
while (--n >= 0)
if (!ul_opt)
putchar(*s++);
else {
if (*s == ' ' && pstate == 0 && ulglitch
&& wouldul(s + 1, n - 1)) {
s++;
continue;
}
if ((state = wouldul(s, n)) != 0) {
c = (*s == '_') ? s[2] : *s;
n -= 2;
s += 3;
} else
c = *s++;
if (state != pstate) {
if (c == ' ' && state == 0 && ulglitch
&& wouldul(s, n - 1))
state = 1;
else
my_putstring(state ? ULenter : ULexit);
}
if (c != ' ' || pstate == 0 || state != 0
|| ulglitch == 0)
#ifdef HAVE_WIDECHAR
{
wchar_t wc;
size_t mblength;
mbstate_t mbstate;
memset(&mbstate, '\0', sizeof(mbstate_t));
s--;
n++;
mblength = xmbrtowc(&wc, s, n, &mbstate);
while (mblength--)
putchar(*s++);
n += mblength;
}
#else
putchar(c);
#endif /* HAVE_WIDECHAR */
if (state && *chUL) {
putsout(chBS);
my_putstring(chUL);
}
pstate = state;
}
}
/* Clear the screen */
void doclear(void)
{
if (Clear && !hard) {
my_putstring(Clear);
/* Put out carriage return so that system doesn't get
* confused by escape sequences when expanding tabs */
putchar('\r');
promptlen = 0;
}
}
/* Go to home position */
void home(void)
{
my_putstring(Home);
}
static int lastcmd, lastarg, lastp;
static int lastcolon;
char shell_line[SHELL_LINE];
/* Read a command and do it. A command consists of an optional integer
* argument followed by the command character. Return the number of
* lines to display in the next screenful. If there is nothing more to
* display in the current file, zero is returned. */
int command(char *filename, register FILE *f)
{
register int nlines;
register int retval = 0;
register int c;
char colonch;
int done;
char comchar, cmdbuf[INIT_BUF];
#define ret(val) retval=val;done++;break
done = 0;
if (!errors)
prompt(filename);
else
errors = 0;
for (;;) {
nlines = number(&comchar);
lastp = colonch = 0;
if (comchar == '.') { /* Repeat last command */
lastp++;
comchar = lastcmd;
nlines = lastarg;
if (lastcmd == ':')
colonch = lastcolon;
}
lastcmd = comchar;
lastarg = nlines;
if ((cc_t) comchar == otty.c_cc[VERASE]) {
kill_line();
prompt(filename);
continue;
}
switch (comchar) {
case ':':
retval = colon(filename, colonch, nlines);
if (retval >= 0)
done++;
break;
case 'b':
case ctrl('B'):
{
register int initline;
if (no_intty) {
ringbell();
return (-1);
}
if (nlines == 0)
nlines++;
putchar('\r');
erasep(0);
putchar('\n');
if (clreol)
cleareol();
printf(P_("...back %d page",
"...back %d pages", nlines),
nlines);
if (clreol)
cleareol();
putchar('\n');
initline = Currline - dlines * (nlines + 1);
if (!noscroll)
--initline;
if (initline < 0)
initline = 0;
Fseek(f, 0L);
Currline = 0; /* skiplns() will make Currline correct */
skiplns(initline, f);
if (!noscroll) {
ret(dlines + 1);
} else {
ret(dlines);
}
}
case ' ':
case 'z':
if (nlines == 0)
nlines = dlines;
else if (comchar == 'z')
dlines = nlines;
ret(nlines);
case 'd':
case ctrl('D'):
if (nlines != 0)
nscroll = nlines;
ret(nscroll);
case 'q':
case 'Q':
end_it(0);
case 's':
case 'f':
case ctrl('F'):
if (nlines == 0)
nlines++;
if (comchar == 'f')
nlines *= dlines;
putchar('\r');
erasep(0);
putchar('\n');
if (clreol)
cleareol();
printf(P_("...skipping %d line",
"...skipping %d lines", nlines),
nlines);
if (clreol)
cleareol();
putchar('\n');
while (nlines > 0) {
while ((c = Getc(f)) != '\n')
if (c == EOF) {
retval = 0;
done++;
goto endsw;
}
Currline++;
nlines--;
}
ret(dlines);
case '\n':
if (nlines != 0)
dlines = nlines;
else
nlines = 1;
ret(nlines);
case '\f':
if (!no_intty) {
doclear();
Fseek(f, screen_start.chrctr);
Currline = screen_start.line;
ret(dlines);
} else {
ringbell();
break;
}
case '\'':
if (!no_intty) {
kill_line();
putsout(_("\n***Back***\n\n"));
Fseek(f, context.chrctr);
Currline = context.line;
ret(dlines);
} else {
ringbell();
break;
}
case '=':
kill_line();
promptlen = printf("%d", Currline);
fflush(stdout);
break;
case 'n':
if (!previousre) {
more_error(_("No previous regular expression"));
break;
}
lastp++;
/* fall through */
case '/':
if (nlines == 0)
nlines++;
kill_line();
putchar('/');
promptlen = 1;
fflush(stdout);
if (lastp) {
putcerr('\r');
search(previousre, f, nlines);
} else {
ttyin(cmdbuf, sizeof(cmdbuf) - 2, '/');
putcerr('\r');
free(previousre);
previousre = xstrdup(cmdbuf);
search(cmdbuf, f, nlines);
}
ret(dlines - 1);
case '!':
do_shell(filename);
break;
case '?':
case 'h':
if (noscroll)
doclear();
putsout(_("\n"
"Most commands optionally preceded by integer argument k. "
"Defaults in brackets.\n"
"Star (*) indicates argument becomes new default.\n"));
puts("---------------------------------------"
"----------------------------------------");
putsout(_
("<space> Display next k lines of text [current screen size]\n"
"z Display next k lines of text [current screen size]*\n"
"<return> Display next k lines of text [1]*\n"
"d or ctrl-D Scroll k lines [current scroll size, initially 11]*\n"
"q or Q or <interrupt> Exit from more\n"
"s Skip forward k lines of text [1]\n"
"f Skip forward k screenfuls of text [1]\n"
"b or ctrl-B Skip backwards k screenfuls of text [1]\n"
"' Go to place where previous search started\n"
"= Display current line number\n"
"/<regular expression> Search for kth occurrence of regular expression [1]\n"
"n Search for kth occurrence of last r.e [1]\n"
"!<cmd> or :!<cmd> Execute <cmd> in a subshell\n"
"v Start up /usr/bin/vi at current line\n"
"ctrl-L Redraw screen\n"
":n Go to kth next file [1]\n"
":p Go to kth previous file [1]\n"
":f Display current file name and line number\n"
". Repeat previous command\n"));
puts("---------------------------------------"
"----------------------------------------");
prompt(filename);
break;
case 'v': /* This case should go right before default */
if (!no_intty) {
/* Earlier: call vi +n file. This also
* works for emacs. POSIX: call vi -c n
* file (when editor is vi or ex). */
char *editor, *p;
int n = (Currline - dlines <= 0 ? 1 :
Currline - (dlines + 1) / 2);
int split = 0;
editor = getenv("VISUAL");
if (editor == NULL || *editor == '\0')
editor = getenv("EDITOR");
if (editor == NULL || *editor == '\0')
editor = VI;
p = strrchr(editor, '/');
if (p)
p++;
else
p = editor;
if (!strcmp(p, "vi") || !strcmp(p, "ex")) {
sprintf(cmdbuf, "-c %d", n);
split = 1;
} else {
sprintf(cmdbuf, "+%d", n);
}
kill_line();
printf("%s %s %s", editor, cmdbuf,
fnames[fnum]);
if (split) {
cmdbuf[2] = 0;
execute(filename, editor, editor,
cmdbuf, cmdbuf + 3,
fnames[fnum], (char *)0);
} else
execute(filename, editor, editor,
cmdbuf, fnames[fnum],
(char *)0);
break;
}
/* fall through */
default:
if (dum_opt) {
kill_line();
if (Senter && Sexit) {
my_putstring(Senter);
promptlen =
printf(_
("[Press 'h' for instructions.]"))
+ 2 * soglitch;
my_putstring(Sexit);
} else
promptlen =
printf(_
("[Press 'h' for instructions.]"));
fflush(stdout);
} else
ringbell();
break;
}
if (done)
break;
}
putchar('\r');
endsw:
inwait = 0;
notell++;
return (retval);
}
static char ch;
/* Execute a colon-prefixed command. Returns <0 if not a command that
* should cause more of the file to be printed. */
int colon(char *filename, int cmd, int nlines)
{
if (cmd == 0)
ch = readch();
else
ch = cmd;
lastcolon = ch;
switch (ch) {
case 'f':
kill_line();
if (!no_intty)
promptlen =
printf(_("\"%s\" line %d"), fnames[fnum], Currline);
else
promptlen = printf(_("[Not a file] line %d"), Currline);
fflush(stdout);
return (-1);
case 'n':
if (nlines == 0) {
if (fnum >= nfiles - 1)
end_it(0);
nlines++;
}
putchar('\r');
erasep(0);
skipf(nlines);
return (0);
case 'p':
if (no_intty) {
ringbell();
return (-1);
}
putchar('\r');
erasep(0);
if (nlines == 0)
nlines++;
skipf(-nlines);
return (0);
case '!':
do_shell(filename);
return (-1);
case 'q':
case 'Q':
end_it(0);
default:
ringbell();
return (-1);
}
}
/* Read a decimal number from the terminal. Set cmd to the non-digit
* which terminates the number. */
int number(char *cmd)
{
register int i;
i = 0;
ch = otty.c_cc[VKILL];
for (;;) {
ch = readch();
if (isdigit(ch))
i = i * 10 + ch - '0';
else if ((cc_t) ch == otty.c_cc[VKILL])
i = 0;
else {
*cmd = ch;
break;
}
}
return (i);
}
void do_shell(char *filename)
{
char cmdbuf[COMMAND_BUF];
int rc;
char *expanded;
kill_line();
putchar('!');
fflush(stdout);
promptlen = 1;
if (lastp)
putsout(shell_line);
else {
ttyin(cmdbuf, sizeof(cmdbuf) - 2, '!');
expanded = 0;
rc = expand(&expanded, cmdbuf);
if (expanded) {
if (strlen(expanded) < sizeof(shell_line))
strcpy(shell_line, expanded);
else
rc = -1;
free(expanded);
}
if (rc < 0) {
putserr(_(" Overflow\n"));
prompt(filename);
return;
} else if (rc > 0) {
kill_line();
promptlen = printf("!%s", shell_line);
}
}
fflush(stdout);
putcerr('\n');
promptlen = 0;
shellp = 1;
execute(filename, shell, shell, "-c", shell_line, 0);
}
/* Search for nth occurrence of regular expression contained in buf in
* the file */
void search(char buf[], FILE *file, register int n)
{
long startline = Ftell(file);
register long line1 = startline;
register long line2 = startline;
register long line3;
register int lncount;
int saveln, rc;
regex_t re;
context.line = saveln = Currline;
context.chrctr = startline;
lncount = 0;
if (!buf)
goto notfound;
if ((rc = regcomp(&re, buf, REG_NOSUB)) != 0) {
char s[REGERR_BUF];
regerror(rc, &re, s, sizeof s);
more_error(s);
}
while (!feof(file)) {
line3 = line2;
line2 = line1;
line1 = Ftell(file);
rdline(file);
lncount++;
if (regexec(&re, Line, 0, NULL, 0) == 0) {
if (--n == 0) {
if (lncount > 3 || (lncount > 1 && no_intty)) {
putchar('\n');
if (clreol)
cleareol();
putsout(_("...skipping\n"));
}
if (!no_intty) {
Currline -=
(lncount >= 3 ? 3 : lncount);
Fseek(file, line3);
if (noscroll) {
if (clreol) {
home();
cleareol();
} else
doclear();
}
} else {
kill_line();
if (noscroll) {
if (clreol) {
home();
cleareol();
} else
doclear();
}
puts(Line);
}
break;
}
}
}
regfree(&re);
if (feof(file)) {
if (!no_intty) {
Currline = saveln;
Fseek(file, startline);
} else {
putsout(_("\nPattern not found\n"));
end_it(0);
}
free(previousre);
previousre = NULL;
notfound:
more_error(_("Pattern not found"));
}
}
void execute(char *filename, char *cmd, ...)
{
int id;
int n;
va_list argp;
char *arg;
char **args;
int argcount;
fflush(stdout);
reset_tty();
for (n = 10; (id = fork()) < 0 && n > 0; n--)
sleep(5);
if (id == 0) {
if (!isatty(0)) {
close(0);
open("/dev/tty", 0);
}
va_start(argp, cmd);
arg = va_arg(argp, char *);
argcount = 0;
while (arg) {
argcount++;
arg = va_arg(argp, char *);
}
va_end(argp);
args = alloca(sizeof(char *) * (argcount + 1));
args[argcount] = NULL;
va_start(argp, cmd);
arg = va_arg(argp, char *);
argcount = 0;
while (arg) {
args[argcount] = arg;
argcount++;
arg = va_arg(argp, char *);
}
va_end(argp);
execvp(cmd, args);
putserr(_("exec failed\n"));
exit(EXIT_FAILURE);
}
if (id > 0) {
signal(SIGINT, SIG_IGN);
signal(SIGQUIT, SIG_IGN);
if (catch_susp)
signal(SIGTSTP, SIG_DFL);
while (wait(0) > 0) ;
signal(SIGINT, end_it);
signal(SIGQUIT, onquit);
if (catch_susp)
signal(SIGTSTP, onsusp);
} else
putserr(_("can't fork\n"));
set_tty();
puts("------------------------");
prompt(filename);
}
/* Skip n lines in the file f */
void skiplns(register int n, register FILE *f)
{
register int c;
while (n > 0) {
while ((c = Getc(f)) != '\n')
if (c == EOF)
return;
n--;
Currline++;
}
}
/* Skip nskip files in the file list (from the command line). Nskip may
* be negative. */
void skipf(register int nskip)
{
if (nskip == 0)
return;
if (nskip > 0) {
if (fnum + nskip > nfiles - 1)
nskip = nfiles - fnum - 1;
} else if (within)
++fnum;
fnum += nskip;
if (fnum < 0)
fnum = 0;
puts(_("\n...Skipping "));
if (clreol)
cleareol();
if (nskip > 0)
putsout(_("...Skipping to file "));
else
putsout(_("...Skipping back to file "));
puts(fnames[fnum]);
if (clreol)
cleareol();
putchar('\n');
--fnum;
}
/*----------------------------- Terminal I/O -------------------------------*/
void initterm(void)
{
int ret;
char *padstr;
char *term;
struct winsize win;
#ifdef do_SIGTTOU
retry:
#endif
#ifndef NON_INTERACTIVE_MORE
no_tty = tcgetattr(fileno(stdout), &otty);
#endif
if (!no_tty) {
docrterase = (otty.c_cc[VERASE] != 255);
docrtkill = (otty.c_cc[VKILL] != 255);
#ifdef do_SIGTTOU
{
int tgrp;
/* Wait until we're in the foreground before we
* save the terminal modes. */
if ((tgrp = tcgetpgrp(fileno(stdout))) < 0)
err(EXIT_FAILURE, "tcgetpgrp");
if (tgrp != getpgrp(0)) {
kill(0, SIGTTOU);
goto retry;
}
}
#endif /* do_SIGTTOU */
if ((term = getenv("TERM")) == NULL) {
dumb++;
ul_opt = 0;
}
my_setupterm(term, 1, &ret);
if (ret <= 0) {
dumb++;
ul_opt = 0;
} else {
#ifdef TIOCGWINSZ
if (ioctl(fileno(stdout), TIOCGWINSZ, &win) < 0) {
#endif
Lpp = my_tgetnum(TERM_LINES);
Mcol = my_tgetnum(TERM_COLS);
#ifdef TIOCGWINSZ
} else {
if ((Lpp = win.ws_row) == 0)
Lpp = my_tgetnum(TERM_LINES);
if ((Mcol = win.ws_col) == 0)
Mcol = my_tgetnum(TERM_COLS);
}
#endif
if ((Lpp <= 0) || my_tgetflag(TERM_HARD_COPY)) {
hard++; /* Hard copy terminal */
Lpp = LINES_PER_PAGE;
}
if (my_tgetflag(TERM_EAT_NEW_LINE))
/* Eat newline at last column + 1; dec, concept */
eatnl++;
if (Mcol <= 0)
Mcol = NUM_COLUMNS;
Wrap = my_tgetflag(TERM_AUTO_RIGHT_MARGIN);
bad_so = my_tgetflag(TERM_CEOL);
eraseln = my_tgetstr(TERM_CLEAR_TO_LINE_END);
Clear = my_tgetstr(TERM_CLEAR);
Senter = my_tgetstr(TERM_STANDARD_MODE);
Sexit = my_tgetstr(TERM_EXIT_STANDARD_MODE);
if ((soglitch = my_tgetnum(TERM_STD_MODE_GLITCH)) < 0)
soglitch = 0;
/* Set up for underlining: some terminals don't
* need it; others have start/stop sequences,
* still others have an underline char sequence
* which is assumed to move the cursor forward
* one character. If underline sequence isn't
* available, settle for standout sequence. */
if (my_tgetflag(TERM_UNDERLINE)
|| my_tgetflag(TERM_OVER_STRIKE))
ul_opt = 0;
if ((chUL = my_tgetstr(TERM_UNDERLINE_CHAR)) == NULL)
chUL = "";
if (((ULenter =
my_tgetstr(TERM_ENTER_UNDERLINE)) == NULL
|| (ULexit =
my_tgetstr(TERM_EXIT_UNDERLINE)) == NULL)
&& !*chUL) {
if ((ULenter = Senter) == NULL
|| (ULexit = Sexit) == NULL) {
ULenter = "";
ULexit = "";
} else
ulglitch = soglitch;
} else {
ulglitch = 0;
}
if ((padstr = my_tgetstr(TERM_PAD_CHAR)) != NULL)
PC = *padstr;
Home = my_tgetstr(TERM_HOME);
if (Home == NULL || *Home == '\0') {
if ((cursorm =
my_tgetstr(TERM_CURSOR_ADDRESS)) != NULL) {
const char *t =
(const char *)my_tgoto(cursorm, 0,
0);
xstrncpy(cursorhome, t,
sizeof(cursorhome));
Home = cursorhome;
}
}
EodClr = my_tgetstr(TERM_CLEAR_TO_SCREEN_END);
if ((chBS = my_tgetstr(TERM_LINE_DOWN)) == NULL)
chBS = "\b";
}
if ((shell = getenv("SHELL")) == NULL)
shell = "/bin/sh";
}
no_intty = tcgetattr(fileno(stdin), &otty);
tcgetattr(fileno(stderr), &otty);
savetty0 = otty;
slow_tty = cfgetispeed(&otty) < B1200;
hardtabs = (otty.c_oflag & TABDLY) != XTABS;
if (!no_tty) {
otty.c_lflag &= ~(ICANON | ECHO);
otty.c_cc[VMIN] = 1;
otty.c_cc[VTIME] = 0;
}
}
int readch(void)
{
unsigned char c;
errno = 0;
if (read(fileno(stderr), &c, 1) <= 0) {
if (errno != EINTR)
end_it(0);
else
c = otty.c_cc[VKILL];
}
return (c);
}
static char *BS = "\b";
static char *BSB = "\b \b";
static char *CARAT = "^";
#define ERASEONECOLUMN \
if (docrterase) \
putserr(BSB); \
else \
putserr(BS);
void ttyin(char buf[], register int nmax, char pchar)
{
char *sp;
int c;
int slash = 0;
int maxlen;
sp = buf;
maxlen = 0;
while (sp - buf < nmax) {
if (promptlen > maxlen)
maxlen = promptlen;
c = readch();
if (c == '\\') {
slash++;
} else if (((cc_t) c == otty.c_cc[VERASE]) && !slash) {
if (sp > buf) {
#ifdef HAVE_WIDECHAR
if (MB_CUR_MAX > 1) {
wchar_t wc;
size_t pos = 0, mblength;
mbstate_t state, state_bak;
memset(&state, '\0', sizeof(mbstate_t));
while (1) {
state_bak = state;
mblength =
mbrtowc(&wc, buf + pos,
sp - buf, &state);
state = (mblength == (size_t)-2
|| mblength ==
(size_t)-1) ? state_bak
: state;
mblength =
(mblength == (size_t)-2
|| mblength == (size_t)-1
|| mblength ==
0) ? 1 : mblength;
if (buf + pos + mblength >= sp)
break;
pos += mblength;
}
if (mblength == 1) {
ERASEONECOLUMN} else {
int wc_width;
wc_width = wcwidth(wc);
wc_width =
(wc_width <
1) ? 1 : wc_width;
while (wc_width--) {
ERASEONECOLUMN}
}
while (mblength--) {
--promptlen;
--sp;
}
} else
#endif /* HAVE_WIDECHAR */
{
--promptlen;
ERASEONECOLUMN-- sp;
}
if ((*sp < ' ' && *sp != '\n') || *sp == RUBOUT) {
--promptlen;
ERASEONECOLUMN}
continue;
} else {
if (!eraseln)
promptlen = maxlen;
siglongjmp(restore, 1);
}
} else if (((cc_t) c == otty.c_cc[VKILL]) && !slash) {
if (hard) {
show(c);
putchar('\n');
putchar(pchar);
} else {
putchar('\r');
putchar(pchar);
if (eraseln)
erasep(1);
else if (docrtkill)
while (promptlen-- > 1)
putserr(BSB);
promptlen = 1;
}
sp = buf;
fflush(stdout);
continue;
}
if (slash && ((cc_t) c == otty.c_cc[VKILL]
|| (cc_t) c == otty.c_cc[VERASE])) {
ERASEONECOLUMN-- sp;
}
if (c != '\\')
slash = 0;
*sp++ = c;
if ((c < ' ' && c != '\n' && c != ESC) || c == RUBOUT) {
c += (c == RUBOUT) ? -0100 : 0100;
putserr(CARAT);
promptlen++;
}
if (c != '\n' && c != ESC) {
putcerr(c);
promptlen++;
} else
break;
}
*--sp = '\0';
if (!eraseln)
promptlen = maxlen;
if (sp - buf >= nmax - 1)
more_error(_("Line too long"));
}
/* return: 0 - unchanged, 1 - changed, -1 - overflow (unchanged) */
int expand(char **outbuf, char *inbuf)
{
char *inpstr;
char *outstr;
char c;
char *temp;
int changed = 0;
int tempsz, xtra, offset;
xtra = strlen(fnames[fnum]) + strlen(shell_line) + 1;
tempsz = 200 + xtra;
temp = xmalloc(tempsz);
inpstr = inbuf;
outstr = temp;
while ((c = *inpstr++) != '\0') {
offset = outstr - temp;
if (tempsz - offset - 1 < xtra) {
tempsz += 200 + xtra;
temp = xrealloc(temp, tempsz);
outstr = temp + offset;
}
switch (c) {
case '%':
if (!no_intty) {
strcpy(outstr, fnames[fnum]);
outstr += strlen(fnames[fnum]);
changed++;
} else
*outstr++ = c;
break;
case '!':
if (!shellp)
more_error(_
("No previous command to substitute for"));
strcpy(outstr, shell_line);
outstr += strlen(shell_line);
changed++;
break;
case '\\':
if (*inpstr == '%' || *inpstr == '!') {
*outstr++ = *inpstr++;
break;
}
default:
*outstr++ = c;
}
}
*outstr++ = '\0';
*outbuf = temp;
return (changed);
}
void show(char c)
{
if ((c < ' ' && c != '\n' && c != ESC) || c == RUBOUT) {
c += (c == RUBOUT) ? -0100 : 0100;
putserr(CARAT);
promptlen++;
}
putcerr(c);
promptlen++;
}
void more_error(char *mess)
{
if (clreol)
cleareol();
else
kill_line();
promptlen += strlen(mess);
if (Senter && Sexit) {
my_putstring(Senter);
putsout(mess);
my_putstring(Sexit);
} else
putsout(mess);
fflush(stdout);
errors++;
siglongjmp(restore, 1);
}
void set_tty(void)
{
otty.c_lflag &= ~(ICANON | ECHO);
otty.c_cc[VMIN] = 1; /* read at least 1 char */
otty.c_cc[VTIME] = 0; /* no timeout */
stty(fileno(stderr), &otty);
}
static int ourputch(int c)
{
return putc(c, stdout);
}
void reset_tty(void)
{
if (no_tty)
return;
if (pstate) {
/* putchar - if that isn't a macro */
tputs(ULexit, fileno(stdout), ourputch);
fflush(stdout);
pstate = 0;
}
otty.c_lflag |= ICANON | ECHO;
otty.c_cc[VMIN] = savetty0.c_cc[VMIN];
otty.c_cc[VTIME] = savetty0.c_cc[VTIME];
stty(fileno(stderr), &savetty0);
}
void rdline(register FILE *f)
{
register int c;
register char *p;
prepare_line_buffer();
p = Line;
while ((c = Getc(f)) != '\n' && c != EOF
&& (size_t)(p - Line) < LineLen - 1)
*p++ = c;
if (c == '\n')
Currline++;
*p = '\0';
}
/* Come here when we get a suspend signal from the terminal */
void onsusp(int dummy __attribute__((__unused__)))
{
sigset_t signals, oldmask;
/* ignore SIGTTOU so we don't get stopped if csh grabs the tty */
signal(SIGTTOU, SIG_IGN);
reset_tty();
fflush(stdout);
signal(SIGTTOU, SIG_DFL);
/* Send the TSTP signal to suspend our process group */
signal(SIGTSTP, SIG_DFL);
/* unblock SIGTSTP or we won't be able to suspend ourself */
sigemptyset(&signals);
sigaddset(&signals, SIGTSTP);
sigprocmask(SIG_UNBLOCK, &signals, &oldmask);
kill(0, SIGTSTP);
/* Pause for station break */
sigprocmask(SIG_SETMASK, &oldmask, NULL);
/* We're back */
signal(SIGTSTP, onsusp);
set_tty();
if (inwait)
siglongjmp(restore, 1);
}