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smol/files.c

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/* $Id$ */
/**************************************************************************
* 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 <ctype.h>
#include <dirent.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, num_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);
buf[0] = '\0';
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);
num_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);
num_lines++;
buf[0] = 0;
}
/* Did we even GET a file? */
if (totsize == 0) {
new_file();
statusbar(_("Read %d lines"), num_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;
new_magicline();
/* Update the edit buffer */
load_file();
}
statusbar(_("Read %d lines"), num_lines);
totlines += num_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);
if (!insert)
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(1, 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 */
fix_editbot();
/* If we've gone off the bottom, recenter, otherwise just redraw */
if (current->lineno > editbot->lineno)
edit_update(current, CENTER);
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;
/* Check to see if the file is a regular file and FOLLOW_SYMLINKS is
set. If so then don't do the delete and recreate code which would
cause unexpected behavior */
lstat(name, &st);
/* Open the file and truncate it. Trust the symlink. */
if ((ISSET(FOLLOW_SYMLINKS) || !S_ISLNK(st.st_mode)) && !tmp) {
if ((fd = open(name, O_WRONLY | O_CREAT | O_TRUNC,
S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH |
S_IWOTH)) == -1) {
if (ISSET(TEMP_OPT)) {
UNSET(TEMP_OPT);
return do_writeout(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) {
if (ISSET(TEMP_OPT)) {
UNSET(TEMP_OPT);
return do_writeout(1);
}
statusbar(_("Could not open file for writing: %s"),
strerror(errno));
return -1;
}
}
dump_buffer(fileage);
while (fileptr != NULL && fileptr->next != NULL) {
/* Next line is so we discount the "magic line" */
if (filebot == fileptr && fileptr->data[0] == '\0')
break;
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;
answer = mallocstrcpy(answer, filename);
if ((exiting) && (ISSET(TEMP_OPT))) {
if (filename[0]) {
i = write_file(answer, 0);
display_main_list();
return i;
} else {
UNSET(TEMP_OPT);
do_exit();
/* They cancelled, abort quit */
return -1;
}
}
while (1) {
i = statusq(1, writefile_list, WRITEFILE_LIST_LEN, answer,
_("File Name to write"));
if (i != -1) {
#ifdef DEBUG
fprintf(stderr, _("filename is %s"), answer);
#endif
if (strcmp(answer, filename)) {
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);
}
/*
* These functions (username_tab_completion, cwd_tab_completion, and
* input_tab were taken from busybox 0.46 (cmdedit.c). Here is the notice
* from that file:
*
* Termios command line History and Editting, originally
* intended for NetBSD sh (ash)
* Copyright (c) 1999
* Main code: Adam Rogoyski <rogoyski@cs.utexas.edu>
* Etc: Dave Cinege <dcinege@psychosis.com>
* Majorly adjusted/re-written for busybox:
* Erik Andersen <andersee@debian.org>
*
* You may use this code as you wish, so long as the original author(s)
* are attributed in any redistributions of the source code.
* This code is 'as is' with no warranty.
* This code may safely be consumed by a BSD or GPL license.
*/
#if 0
char **username_tab_completion(char *buf, int *num_matches)
{
char **matches = (char **) NULL;
*num_matches = 0;
#ifdef DEBUG
fprintf(stderr, "\nin username_tab_completion\n");
#endif
return (matches);
}
#endif
/* This was originally called exe_n_cwd_tab_completion, but we're not
worried about executables, only filenames :> */
char **cwd_tab_completion(char *buf, int *num_matches)
{
char *dirName, *tmp = NULL, *tmp2 = NULL;
char **matches = (char **) NULL;
DIR *dir;
struct dirent *next;
matches = nmalloc(BUFSIZ);
/* Stick a wildcard onto the buf, for later use */
strcat(buf, "*");
/* Okie, if there's a / in the buffer, strip out the directory part */
if (strcmp(buf, "") && strstr(buf, "/")) {
dirName = malloc(strlen(buf) + 1);
tmp = buf + strlen(buf);
while (*tmp != '/' && tmp != buf)
tmp--;
tmp++;
strncpy(dirName, buf, tmp - buf + 1);
dirName[tmp - buf] = 0;
} else {
if ((dirName = getcwd(NULL, 0)) == NULL)
return matches;
else
tmp = buf;
}
#ifdef DEBUG
fprintf(stderr, "\nDir = %s\n", dirName);
fprintf(stderr, "\nbuf = %s\n", buf);
fprintf(stderr, "\ntmp = %s\n", tmp);
#endif
dir = opendir(dirName);
if (!dir) {
/* Don't print an error, just shut up and return */
*num_matches = 0;
beep();
return (matches);
}
while ((next = readdir(dir)) != NULL) {
/* Some quick sanity checks */
if ((strcmp(next->d_name, "..") == 0)
|| (strcmp(next->d_name, ".") == 0)) {
continue;
}
#ifdef DEBUG
fprintf(stderr, "Comparing \'%s\'\n", next->d_name);
#endif
/* See if this matches */
if (check_wildcard_match(next->d_name, tmp) == TRUE) {
/* Cool, found a match. Add it to the list
* This makes a lot more sense to me (Chris) this way...
*/
tmp2 = NULL;
tmp2 = nmalloc(strlen(next->d_name) + 1);
strcpy(tmp2, next->d_name);
matches[*num_matches] = tmp2;
++*num_matches;
/* If there's no more room, bail out */
if (*num_matches == BUFSIZ)
break;
}
}
return (matches);
}
/* This function now has an arg which refers to how much the
* statusbar (place) should be advanced, i.e. the new cursor pos.
*/
char *input_tab(char *buf, int place, int *lastWasTab, int *newplace)
{
/* Do TAB completion */
static int num_matches = 0, match_matches = 0;
static char **matches = (char **) NULL;
int pos = place, i = 0, col = 0, editline = 0;
int longestname = 0;
char *foo;
struct stat fileinfo;
if (*lastWasTab == FALSE) {
char *tmp, *copyto, *matchBuf;
*lastWasTab = 1;
/* Make a local copy of the string -- up to the position of the
cursor */
matchBuf = (char *) calloc(strlen(buf) + 2, sizeof(char));
strncpy(matchBuf, buf, place);
tmp = matchBuf;
/* skip any leading white space */
while (*tmp && isspace((int) *tmp))
++tmp;
/* Free up any memory already allocated */
if (matches != NULL) {
for (i = i; i < num_matches; i++)
free(matches[i]);
free(matches);
matches = (char **) NULL;
num_matches = 0;
}
/* If the word starts with `~' and there is no slash in the word,
* then try completing this word as a username. */
/* FIXME -- this check is broken!
if (*tmp == '~' && !strchr(tmp, '/'))
matches = username_tab_completion(tmp, &num_matches); */
/* Try to match everything in the current working directory that
* matches. */
if (!matches)
matches = cwd_tab_completion(tmp, &num_matches);
/* Don't leak memory */
free(matchBuf);
#ifdef DEBUG
fprintf(stderr, "%d matches found...\n", num_matches);
#endif
/* Did we find exactly one match? */
switch (num_matches) {
case 0:
blank_edit();
wrefresh(edit);
break;
case 1:
buf = nrealloc(buf, strlen(buf) + strlen(matches[0]) + 1);
if (strcmp(buf, "") && strstr(buf, "/")) {
for (tmp = buf + strlen(buf); *tmp != '/' && tmp != buf;
tmp--);
tmp++;
} else
tmp = buf;
if (!strcmp(tmp, matches[0])) {
/* Is it a directory? */
if (stat(buf, &fileinfo) == -1)
break;
else if (S_ISDIR(fileinfo.st_mode)) {
/* Tack on a slash */
strncat(buf, "/", 1);
*newplace += 1;
/* now we start over with 0 tabs so far */
*lastWasTab = 0;
}
break;
}
copyto = tmp;
for (pos = 0; *tmp == matches[0][pos] &&
pos <= strlen(matches[0]); pos++)
tmp++;
/* write out the matched name */
strncpy(copyto, matches[0], strlen(matches[0]) + 1);
*newplace += strlen(matches[0]) - pos;
if (stat(buf, &fileinfo) == -1)
break;
else if (S_ISDIR(fileinfo.st_mode)) {
strncat(buf, "/", 1);
*newplace += 1;
/* now we start over again with # of tabs so far */
*lastWasTab = 0;
}
break;
default:
/* Check to see if all matches share a beginning, and if so
tack it onto buf and then beep */
if (strcmp(buf, "") && strstr(buf, "/")) {
for (tmp = buf + strlen(buf); *tmp != '/' && tmp != buf;
tmp--);
tmp++;
} else
tmp = buf;
for (pos = 0; *tmp == matches[0][pos] && *tmp != 0 &&
pos <= strlen(matches[0]); pos++)
tmp++;
while (1) {
match_matches = 0;
for (i = 0; i < num_matches; i++) {
if (matches[i][pos] == 0)
break;
else if (matches[i][pos] == matches[0][pos])
match_matches++;
}
if (match_matches == num_matches &&
(i == num_matches || matches[i] != 0)) {
/* All the matches have the same character at pos+1,
so paste it into buf... */
buf = nrealloc(buf, strlen(buf) + 2);
strncat(buf, matches[0] + pos, 1);
*newplace += 1;
pos++;
} else {
beep();
break;
}
}
break;
}
} else {
/* Ok -- the last char was a TAB. Since they
* just hit TAB again, print a list of all the
* available choices... */
if (matches && num_matches > 0) {
/* Blank the edit window, and print the matches out there */
blank_edit();
wmove(edit, 0, 0);
editline = 0;
/* Figure out the length of the longest filename */
for (i = 0; i < num_matches; i++)
if (strlen(matches[i]) > longestname)
longestname = strlen(matches[i]);
if (longestname > COLS - 1)
longestname = COLS - 1;
foo = nmalloc(longestname + 5);
/* Print the list of matches */
for (i = 0, col = 0; i < num_matches; i++) {
/* make each filename shown be the same length as the longest
filename, with two spaces at the end */
snprintf(foo, longestname + 1, matches[i]);
while (strlen(foo) < longestname)
strcat(foo, " ");
strcat(foo, " ");
/* Disable el cursor */
curs_set(0);
/* now, put the match on the screen */
waddnstr(edit, foo, strlen(foo));
col += strlen(foo);
/* And if the next match isn't going to fit on the
line, move to the next one */
if (col > (COLS - longestname) && matches[i + 1] != NULL) {
editline++;
wmove(edit, editline, 0);
if (editline == editwinrows - 1) {
waddstr(edit, _("(more)"));
break;
}
col = 0;
}
}
free(foo);
wrefresh(edit);
} else
beep();
}
edit_refresh();
curs_set(1);
return buf;
}
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