ports/nano
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nano/files.c
Chris Allegretta bceb1b21a6 Split nano.c up more 
git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@27 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
2000-06-19 04:22:15 +00:00

471 строка
11 KiB
C
Исходник Ответственный История

/**************************************************************************
* files.c *
* *
* Copyright (C) 1999 Chris Allegretta *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 1, or (at your option) *
* any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software *
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
* *
**************************************************************************/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include "config.h"
#include "proto.h"
#include "nano.h"
#ifndef NANO_SMALL
#include <libintl.h>
#define _(string) gettext(string)
#else
#define _(string) (string)
#endif
/* Load file into edit buffer - takes data from file struct */
void load_file(void)
{
current = fileage;
wmove(edit, current_y, current_x);
}
/* What happens when there is no file to open? aiee! */
void new_file(void)
{
fileage = nmalloc(sizeof(filestruct));
fileage->data = nmalloc(1);
strcpy(fileage->data, "");
fileage->prev = NULL;
fileage->next = NULL;
fileage->lineno = 1;
filebot = fileage;
edittop = fileage;
editbot = fileage;
current = fileage;
totlines = 1;
UNSET(VIEW_MODE);
}
int read_byte(int fd, char *filename, char *input)
{
static char buf[BUFSIZ];
static int index = 0;
static int size = 0;
if (index == size) {
index = 0;
size = read(fd, buf, BUFSIZ);
if (size == -1) {
clear();
refresh();
resetty();
endwin();
perror(filename);
}
if (!size)
return 0;
}
*input = buf[index++];
return 1;
}
filestruct *read_line(char *buf, filestruct * prev, int *line1ins)
{
filestruct *fileptr;
fileptr = nmalloc(sizeof(filestruct));
fileptr->data = nmalloc(strlen(buf) + 2);
strcpy(fileptr->data, buf);
if (*line1ins) {
/* Special case, insert with cursor on 1st line. */
fileptr->prev = NULL;
fileptr->next = fileage;
fileptr->lineno = 1;
*line1ins = 0;
/* If we're inserting into the first line of the file, then
we want to make sure that our edit buffer stays on the
first line (and that fileage stays up to date!) */
fileage = fileptr;
edittop = fileptr;
} else if (fileage == NULL) {
fileage = fileptr;
fileage->lineno = 1;
fileage->next = fileage->prev = NULL;
fileptr = filebot = fileage;
} else if (prev) {
fileptr->prev = prev;
fileptr->next = NULL;
fileptr->lineno = prev->lineno + 1;
prev->next = fileptr;
} else {
die(_("read_line: not on first line and prev is NULL"));
}
return fileptr;
}
int read_file(int fd, char *filename)
{
long size, lines = 0, linetemp = 0;
char input[2]; /* buffer */
char *buf;
long i = 0, bufx = 128;
filestruct *fileptr = current, *tmp = NULL;
int line1ins = 0;
buf = nmalloc(bufx);
if (fileptr != NULL && fileptr->prev != NULL) {
fileptr = fileptr->prev;
tmp = fileptr;
} else if (fileptr != NULL && fileptr->prev == NULL) {
tmp = fileage;
current = fileage;
line1ins = 1;
}
input[1] = 0;
/* Read the entire file into file struct */
while ((size = read_byte(fd, filename, input)) > 0) {
linetemp = 0;
if (input[0] == '\n') {
fileptr = read_line(buf, fileptr, &line1ins);
lines++;
buf[0] = 0;
i = 0;
} else {
/* Now we allocate a bigger buffer 128 characters at a time.
If we allocate a lot of space for one line, we may indeed
have to use a buffer this big later on, so we don't
decrease it at all. We do free it at the end though. */
if (i >= bufx - 1) {
buf = nrealloc(buf, bufx + 128);
bufx += 128;
}
buf[i] = input[0];
buf[i + 1] = 0;
i++;
}
totsize += size;
}
/* Did we not get a newline but still have stuff to do? */
if (buf[0]) {
fileptr = read_line(buf, fileptr, &line1ins);
lines++;
buf[0] = 0;
}
/* Did we even GET a file? */
if (totsize == 0) {
new_file();
statusbar(_("Read %d lines"), lines);
return 1;
}
if (current != NULL) {
fileptr->next = current;
current->prev = fileptr;
renumber(current);
current_x = 0;
placewewant = 0;
} else if (fileptr->next == NULL) {
filebot = fileptr;
load_file();
}
statusbar(_("Read %d lines"), lines);
totlines += lines;
free(buf);
close(fd);
return 1;
}
/* Open the file (and decide if it exists) */
int open_file(char *filename, int insert, int quiet)
{
int fd;
struct stat fileinfo;
if (!strcmp(filename, "") || stat(filename, &fileinfo) == -1) {
if (insert) {
if (!quiet)
statusbar(_("\"%s\" not found"), filename);
return -1;
} else {
/* We have a new file */
statusbar(_("New File"));
new_file();
}
} else if ((fd = open(filename, O_RDONLY)) == -1) {
if (!quiet)
statusbar("%s: %s", strerror(errno), filename);
return -1;
} else { /* File is A-OK */
if (S_ISDIR(fileinfo.st_mode)) {
statusbar(_("File \"%s\" is a directory"), filename);
new_file();
return -1;
}
if (!quiet)
statusbar(_("Reading File"));
read_file(fd, filename);
}
return 1;
}
int do_insertfile(void)
{
int i;
wrap_reset();
i = statusq(writefile_list, WRITEFILE_LIST_LEN, "",
_("File to insert [from ./] "));
if (i != -1) {
#ifdef DEBUG
fprintf(stderr, "filename is %s", answer);
#endif
i = open_file(answer, 1, 0);
dump_buffer(fileage);
set_modified();
/* Here we want to rebuild the edit window */
for(i = 0, editbot = edittop;
i <= editwinrows - 1
&& i <= totlines
&& editbot->next != NULL;
editbot = editbot->next, i++);
/* If we've gone off the bottom, recenter, otherwise just redraw */
if(current->lineno > editbot->lineno)
edit_update(current);
else
edit_refresh();
UNSET(KEEP_CUTBUFFER);
display_main_list();
return i;
} else {
statusbar(_("Cancelled"));
UNSET(KEEP_CUTBUFFER);
display_main_list();
return 0;
}
}
/*
* Write a file out. If tmp is nonzero, we set the umask to 0600,
* we don't set the global variable filename to it's name, and don't
* print out how many lines we wrote on the statusbar.
*
* Note that tmp is only set to 1 for storing temporary files internal
* to the editor, and is completely different from temp_opt.
*/
int write_file(char *name, int tmp)
{
long size, lineswritten = 0;
char buf[PATH_MAX + 1];
filestruct *fileptr;
int fd, mask = 0;
struct stat st;
if (!strcmp(name, "")) {
statusbar(_("Cancelled"));
return -1;
}
titlebar();
fileptr = fileage;
/* Open the file and truncate it. Trust the symlink. */
if (ISSET(FOLLOW_SYMLINKS) && !tmp) {
if ((fd = open(name, O_WRONLY | O_CREAT | O_TRUNC,
S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH |
S_IWOTH)) == -1) {
statusbar(_("Could not open file for writing: %s"),
strerror(errno));
return -1;
}
}
/* Don't follow symlink. Create new file. */
else {
if (strlen(name) > (PATH_MAX - 7)) {
statusbar(_("Could not open file: Path length exceeded."));
return -1;
}
memset(buf, 0x00, PATH_MAX + 1);
strcat(buf, name);
strcat(buf, ".XXXXXX");
if ((fd = mkstemp(buf)) == -1) {
statusbar(_("Could not open file for writing: %s"),
strerror(errno));
return -1;
}
}
dump_buffer(fileage);
while (fileptr != NULL && fileptr->next != NULL) {
size = write(fd, fileptr->data, strlen(fileptr->data));
if (size == -1) {
statusbar(_("Could not open file for writing: %s"),
strerror(errno));
return -1;
} else {
#ifdef DEBUG
fprintf(stderr, _("Wrote >%s\n"), fileptr->data);
#endif
}
write(fd, "\n", 1);
fileptr = fileptr->next;
lineswritten++;
}
if (fileptr != NULL) {
size = write(fd, fileptr->data, strlen(fileptr->data));
if (size == -1) {
statusbar(_("Could not open file for writing: %s"),
strerror(errno));
return -1;
} else if (size > 0) {
size = write(fd, "\n", 1);
if (size == -1) {
statusbar(_("Could not open file for writing: %s"),
strerror(errno));
return -1;
}
}
}
if (close(fd) == -1) {
statusbar(_("Could not close %s: %s"), name, strerror(errno));
unlink(buf);
return -1;
}
if (!ISSET(FOLLOW_SYMLINKS) || tmp) {
if (stat(name, &st) == -1) {
/* Use default umask as file permisions if file is a new file. */
mask = umask(0);
umask(mask);
if (tmp) /* We don't want anyone reading our temporary file! */
mask = 0600;
else
mask = 0666 & ~mask;
} else {
/* Use permissions from file we are overwriting. */
mask = st.st_mode;
if (unlink(name) == -1) {
if (errno != ENOENT) {
statusbar(_("Could not open %s for writing: %s"),
name, strerror(errno));
unlink(buf);
return -1;
}
}
}
if (link(buf, name) != -1)
unlink(buf);
else if (errno != EPERM) {
statusbar(_("Could not open %s for writing: %s"),
name, strerror(errno));
unlink(buf);
return -1;
} else if (rename(buf, name) == -1) { /* Try a rename?? */
statusbar(_("Could not open %s for writing: %s"),
name, strerror(errno));
unlink(buf);
return -1;
}
if (chmod(name, mask) == -1) {
statusbar(_("Could not set permissions %o on %s: %s"),
mask, name, strerror(errno));
}
}
if (!tmp) {
strncpy(filename, name, 132);
statusbar(_("Wrote %d lines"), lineswritten);
}
UNSET(MODIFIED);
titlebar();
return 1;
}
int do_writeout(int exiting)
{
int i = 0;
strncpy(answer, filename, 132);
if ((exiting) && (temp_opt) && (filename)) {
i = write_file(answer, 0);
display_main_list();
return i;
}
while (1) {
i = statusq(writefile_list, WRITEFILE_LIST_LEN, answer,
_("File Name to write"));
if (i != -1) {
#ifdef DEBUG
fprintf(stderr, _("filename is %s"), answer);
#endif
if (strncmp(answer, filename, 132)) {
struct stat st;
if (!stat(answer, &st)) {
i = do_yesno(0, 0, _("File exists, OVERWRITE ?"));
if (!i || (i == -1))
continue;
}
}
i = write_file(answer, 0);
display_main_list();
return i;
} else {
statusbar(_("Cancelled"));
display_main_list();
return 0;
}
}
}
int do_writeout_void(void)
{
return do_writeout(0);
}
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