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mc/lib/util.c

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/* Various utilities
Copyright (C) 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003,
2004, 2005, 2007, 2009 Free Software Foundation, Inc.
Written 1994, 1995, 1996 by:
Miguel de Icaza, Janne Kukonlehto, Dugan Porter,
Jakub Jelinek, Mauricio Plaza.
The file_date routine is mostly from GNU's fileutils package,
written by Richard Stallman and David MacKenzie.
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 2 of the License, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
/** \file
* \brief Source: various utilities
*/
#include <config.h>
#include <ctype.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "lib/global.h"
#include "lib/tty/win.h" /* xterm_flag */
#include "lib/search.h"
#include "lib/mcconfig.h"
#include "lib/timefmt.h"
#include "lib/fileloc.h"
#include "lib/vfs/mc-vfs/vfs.h"
#include "lib/strutil.h"
#include "src/file.h" /* copy_file_file() */
#ifndef HAVE_CHARSET
#include "src/main.h" /* eight_bit_clean */
#endif
int easy_patterns = 1;
/*
* If true, SI units (1000 based) will be used for
* larger units (kilobyte, megabyte, ...).
* If false binary units (1024 based) will be used.
*/
int kilobyte_si = 0;
char *user_recent_timeformat = NULL; /* time format string for recent dates */
char *user_old_timeformat = NULL; /* time format string for older dates */
extern void str_replace(char *s, char from, char to)
{
for (; *s != '\0'; s++) {
if (*s == from)
*s = to;
}
}
static inline int
is_7bit_printable (unsigned char c)
{
return (c > 31 && c < 127);
}
static inline int
is_iso_printable (unsigned char c)
{
return ((c > 31 && c < 127) || c >= 160);
}
static inline int
is_8bit_printable (unsigned char c)
{
/* "Full 8 bits output" doesn't work on xterm */
if (xterm_flag)
return is_iso_printable (c);
return (c > 31 && c != 127 && c != 155);
}
int
is_printable (int c)
{
c &= 0xff;
#ifdef HAVE_CHARSET
/* "Display bits" is ignored, since the user controls the output
by setting the output codepage */
return is_8bit_printable (c);
#else
if (!eight_bit_clean)
return is_7bit_printable (c);
if (full_eight_bits) {
return is_8bit_printable (c);
} else
return is_iso_printable (c);
#endif /* !HAVE_CHARSET */
}
/* Calculates the message dimensions (lines and columns) */
void
msglen (const char *text, int *lines, int *columns)
{
int nlines = 1; /* even the empty string takes one line */
int ncolumns = 0;
int colindex = 0;
for (; *text != '\0'; text++) {
if (*text == '\n') {
nlines++;
colindex = 0;
} else {
colindex++;
if (colindex > ncolumns)
ncolumns = colindex;
}
}
*lines = nlines;
*columns = ncolumns;
}
/*
* Copy from s to d, and trim the beginning if necessary, and prepend
* "..." in this case. The destination string can have at most len
* bytes, not counting trailing 0.
*/
char *
trim (const char *s, char *d, int len)
{
int source_len;
/* Sanity check */
len = max (len, 0);
source_len = strlen (s);
if (source_len > len) {
/* Cannot fit the whole line */
if (len <= 3) {
/* We only have room for the dots */
memset (d, '.', len);
d[len] = 0;
return d;
} else {
/* Begin with ... and add the rest of the source string */
memset (d, '.', 3);
strcpy (d + 3, s + 3 + source_len - len);
}
} else
/* We can copy the whole line */
strcpy (d, s);
return d;
}
/*
* Quote the filename for the purpose of inserting it into the command
* line. If quote_percent is 1, replace "%" with "%%" - the percent is
* processed by the mc command line.
*/
char *
name_quote (const char *s, int quote_percent)
{
char *ret, *d;
d = ret = g_malloc (strlen (s) * 2 + 2 + 1);
if (*s == '-') {
*d++ = '.';
*d++ = '/';
}
for (; *s; s++, d++) {
switch (*s) {
case '%':
if (quote_percent)
*d++ = '%';
break;
case '\'':
case '\\':
case '\r':
case '\n':
case '\t':
case '"':
case ';':
case ' ':
case '?':
case '|':
case '[':
case ']':
case '{':
case '}':
case '<':
case '>':
case '`':
case '!':
case '$':
case '&':
case '*':
case '(':
case ')':
*d++ = '\\';
break;
case '~':
case '#':
if (d == ret)
*d++ = '\\';
break;
}
*d = *s;
}
*d = '\0';
return ret;
}
char *
fake_name_quote (const char *s, int quote_percent)
{
(void) quote_percent;
return g_strdup (s);
}
/*
* Remove the middle part of the string to fit given length.
* Use "~" to show where the string was truncated.
* Return static buffer, no need to free() it.
*/
const char *
name_trunc (const char *txt, size_t trunc_len)
{
return str_trunc (txt, trunc_len);
}
/*
* path_trunc() is the same as name_trunc() above but
* it deletes possible password from path for security
* reasons.
*/
const char *
path_trunc (const char *path, size_t trunc_len) {
char *secure_path = strip_password (g_strdup (path), 1);
const char *ret = str_trunc (secure_path, trunc_len);
g_free (secure_path);
return ret;
}
const char *
size_trunc (double size)
{
static char x [BUF_TINY];
long int divisor = 1;
const char *xtra = "";
if (size > 999999999L){
divisor = kilobyte_si?1000:1024;
xtra = kilobyte_si?"k":"K";
if (size/divisor > 999999999L){
divisor = kilobyte_si?(1000*1000):(1024*1024);
xtra = kilobyte_si?"m":"M";
}
}
g_snprintf (x, sizeof (x), "%.0f%s", (size/divisor), xtra);
return x;
}
const char *
size_trunc_sep (double size)
{
static char x [60];
int count;
const char *p, *y;
char *d;
p = y = size_trunc (size);
p += strlen (p) - 1;
d = x + sizeof (x) - 1;
*d-- = 0;
while (p >= y && isalpha ((unsigned char) *p))
*d-- = *p--;
for (count = 0; p >= y; count++){
if (count == 3){
*d-- = ',';
count = 0;
}
*d-- = *p--;
}
d++;
if (*d == ',')
d++;
return d;
}
/*
* Print file SIZE to BUFFER, but don't exceed LEN characters,
* not including trailing 0. BUFFER should be at least LEN+1 long.
* This function is called for every file on panels, so avoid
* floating point by any means.
*
* Units: size units (filesystem sizes are 1K blocks)
* 0=bytes, 1=Kbytes, 2=Mbytes, etc.
*/
void
size_trunc_len (char *buffer, unsigned int len, off_t size, int units)
{
/* Avoid taking power for every file. */
static const off_t power10 [] =
{1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000,
1000000000};
static const char * const suffix [] =
{"", "K", "M", "G", "T", "P", "E", "Z", "Y", NULL};
static const char * const suffix_lc [] =
{"", "k", "m", "g", "t", "p", "e", "z", "y", NULL};
int j = 0;
int size_remain;
if (len == 0)
len = 9;
/*
* recalculate from 1024 base to 1000 base if units>0
* We can't just multiply by 1024 - that might cause overflow
* if off_t type is too small
*/
if (units && kilobyte_si) {
for (j = 0; j < units; j++) {
size_remain=((size % 125)*1024)/1000; /* size mod 125, recalculated */
size = size / 125; /* 128/125 = 1024/1000 */
size = size * 128; /* This will convert size from multiple of 1024 to multiple of 1000 */
size += size_remain; /* Re-add remainder lost by division/multiplication */
}
}
for (j = units; suffix [j] != NULL; j++) {
if (size == 0) {
if (j == units) {
/* Empty files will print "0" even with minimal width. */
g_snprintf (buffer, len + 1, "0");
break;
}
/* Use "~K" or just "K" if len is 1. Use "B" for bytes. */
g_snprintf (buffer, len + 1, (len > 1) ? "~%s" : "%s",
(j > 1) ? (kilobyte_si ? suffix_lc[j - 1] : suffix[j - 1]) : "B");
break;
}
if (size < power10 [len - (j > 0)]) {
g_snprintf (buffer, len + 1, "%lu%s", (unsigned long) size, kilobyte_si ? suffix_lc[j] : suffix[j]);
break;
}
/* Powers of 1000 or 1024, with rounding. */
if (kilobyte_si) {
size = (size + 500) / 1000;
} else {
size = (size + 512) >> 10;
}
}
}
int
is_exe (mode_t mode)
{
if ((S_IXUSR & mode) || (S_IXGRP & mode) || (S_IXOTH & mode))
return 1;
return 0;
}
#define ismode(n,m) ((n & m) == m)
const char *
string_perm (mode_t mode_bits)
{
static char mode[11];
strcpy (mode, "----------");
if (S_ISDIR (mode_bits))
mode[0] = 'd';
if (S_ISCHR (mode_bits))
mode[0] = 'c';
if (S_ISBLK (mode_bits))
mode[0] = 'b';
if (S_ISLNK (mode_bits))
mode[0] = 'l';
if (S_ISFIFO (mode_bits))
mode[0] = 'p';
if (S_ISNAM (mode_bits))
mode[0] = 'n';
if (S_ISSOCK (mode_bits))
mode[0] = 's';
if (S_ISDOOR (mode_bits))
mode[0] = 'D';
if (ismode (mode_bits, S_IXOTH))
mode[9] = 'x';
if (ismode (mode_bits, S_IWOTH))
mode[8] = 'w';
if (ismode (mode_bits, S_IROTH))
mode[7] = 'r';
if (ismode (mode_bits, S_IXGRP))
mode[6] = 'x';
if (ismode (mode_bits, S_IWGRP))
mode[5] = 'w';
if (ismode (mode_bits, S_IRGRP))
mode[4] = 'r';
if (ismode (mode_bits, S_IXUSR))
mode[3] = 'x';
if (ismode (mode_bits, S_IWUSR))
mode[2] = 'w';
if (ismode (mode_bits, S_IRUSR))
mode[1] = 'r';
#ifdef S_ISUID
if (ismode (mode_bits, S_ISUID))
mode[3] = (mode[3] == 'x') ? 's' : 'S';
#endif /* S_ISUID */
#ifdef S_ISGID
if (ismode (mode_bits, S_ISGID))
mode[6] = (mode[6] == 'x') ? 's' : 'S';
#endif /* S_ISGID */
#ifdef S_ISVTX
if (ismode (mode_bits, S_ISVTX))
mode[9] = (mode[9] == 'x') ? 't' : 'T';
#endif /* S_ISVTX */
return mode;
}
/* p: string which might contain an url with a password (this parameter is
modified in place).
has_prefix = 0: The first parameter is an url without a prefix
(user[:pass]@]machine[:port][remote-dir). Delete
the password.
has_prefix = 1: Search p for known url prefixes. If found delete
the password from the url.
Caveat: only the first url is found
*/
char *
strip_password (char *p, int has_prefix)
{
static const struct {
const char *name;
size_t len;
} prefixes[] = { {"/#ftp:", 6},
{"ftp://", 6},
{"/#mc:", 5},
{"mc://", 5},
{"/#smb:", 6},
{"smb://", 6},
{"/#sh:", 5},
{"sh://", 5},
{"ssh://", 6}
};
char *at, *inner_colon, *dir;
size_t i;
char *result = p;
for (i = 0; i < sizeof (prefixes)/sizeof (prefixes[0]); i++) {
char *q;
if (has_prefix) {
if((q = strstr (p, prefixes[i].name)) == 0)
continue;
else
p = q + prefixes[i].len;
}
if ((dir = strchr (p, PATH_SEP)) != NULL)
*dir = '\0';
/* search for any possible user */
at = strrchr (p, '@');
if (dir)
*dir = PATH_SEP;
/* We have a username */
if (at) {
inner_colon = memchr (p, ':', at - p);
if (inner_colon)
memmove (inner_colon, at, strlen(at) + 1);
}
break;
}
return (result);
}
const char *
strip_home_and_password(const char *dir)
{
size_t len;
static char newdir [MC_MAXPATHLEN];
if (home_dir && !strncmp (dir, home_dir, len = strlen (home_dir)) &&
(dir[len] == PATH_SEP || dir[len] == '\0')){
newdir [0] = '~';
g_strlcpy (&newdir [1], &dir [len], sizeof(newdir) - 1);
return newdir;
}
/* We do not strip homes in /#ftp tree, I do not like ~'s there
(see ftpfs.c why) */
g_strlcpy (newdir, dir, sizeof(newdir));
strip_password (newdir, 1);
return newdir;
}
const char *
extension (const char *filename)
{
const char *d = strrchr (filename, '.');
return (d != NULL) ? d + 1 : "";
}
int
exist_file (const char *name)
{
return access (name, R_OK) == 0;
}
int
check_for_default (const char *default_file, const char *file)
{
if (!exist_file (file)) {
FileOpContext *ctx;
off_t count = 0;
double bytes = 0.0;
if (!exist_file (default_file))
return -1;
ctx = file_op_context_new (OP_COPY);
file_op_context_create_ui (ctx, 0);
copy_file_file (ctx, default_file, file, TRUE, &count, &bytes, TRUE);
file_op_context_destroy (ctx);
}
return 0;
}
char *
load_file (const char *filename)
{
FILE *data_file;
struct stat s;
char *data;
long read_size;
if ((data_file = fopen (filename, "r")) == NULL){
return 0;
}
if (fstat (fileno (data_file), &s) != 0){
fclose (data_file);
return 0;
}
data = g_malloc (s.st_size+1);
read_size = fread (data, 1, s.st_size, data_file);
data [read_size] = 0;
fclose (data_file);
if (read_size > 0)
return data;
else {
g_free (data);
return 0;
}
}
char *
load_mc_home_file (const char *_mc_home, const char *_mc_home_alt, const char *filename, char **allocated_filename)
{
char *hintfile_base, *hintfile;
char *lang;
char *data;
hintfile_base = concat_dir_and_file (_mc_home, filename);
lang = guess_message_value ();
hintfile = g_strconcat (hintfile_base, ".", lang, (char *) NULL);
data = load_file (hintfile);
if (!data) {
g_free (hintfile);
g_free (hintfile_base);
hintfile_base = concat_dir_and_file (_mc_home_alt, filename);
hintfile = g_strconcat (hintfile_base, ".", lang, (char *) NULL);
data = load_file (hintfile);
if (!data) {
/* Fall back to the two-letter language code */
if (lang[0] && lang[1])
lang[2] = 0;
hintfile = g_strconcat (hintfile_base, ".", lang, (char *) NULL);
data = load_file (hintfile);
if (!data) {
g_free (hintfile);
hintfile = hintfile_base;
data = load_file (hintfile_base);
}
}
}
g_free (lang);
if (hintfile != hintfile_base)
g_free (hintfile_base);
if (allocated_filename)
*allocated_filename = hintfile;
else
g_free (hintfile);
return data;
}
/* Check strftime() results. Some systems (i.e. Solaris) have different
short-month-name sizes for different locales */
size_t
i18n_checktimelength (void)
{
size_t length;
time_t testtime = time (NULL);
struct tm* lt = localtime(&testtime);
if (lt == NULL) {
/* huh, localtime() doesnt seem to work ... falling back to "(invalid)" */
length = str_term_width1 (_(INVALID_TIME_TEXT));
} else {
char buf [MB_LEN_MAX * MAX_I18NTIMELENGTH + 1];
size_t a, b;
strftime (buf, sizeof(buf) - 1, user_recent_timeformat, lt);
a = str_term_width1 (buf);
strftime (buf, sizeof(buf) - 1, user_old_timeformat, lt);
b = str_term_width1 (buf);
length = max (a, b);
length = max ((size_t)str_term_width1 (_(INVALID_TIME_TEXT)), length);
}
/* Don't handle big differences. Use standard value (email bug, please) */
if (length > MAX_I18NTIMELENGTH || length < MIN_I18NTIMELENGTH)
length = STD_I18NTIMELENGTH;
return length;
}
const char *
file_date (time_t when)
{
static char timebuf [MB_LEN_MAX * MAX_I18NTIMELENGTH + 1];
time_t current_time = time ((time_t) 0);
const char *fmt;
if (current_time > when + 6L * 30L * 24L * 60L * 60L /* Old. */
|| current_time < when - 60L * 60L) /* In the future. */
/* The file is fairly old or in the future.
POSIX says the cutoff is 6 months old;
approximate this by 6*30 days.
Allow a 1 hour slop factor for what is considered "the future",
to allow for NFS server/client clock disagreement.
Show the year instead of the time of day. */
fmt = user_old_timeformat;
else
fmt = user_recent_timeformat;
FMT_LOCALTIME(timebuf, sizeof (timebuf), fmt, when);
return timebuf;
}
const char *
extract_line (const char *s, const char *top)
{
static char tmp_line [BUF_MEDIUM];
char *t = tmp_line;
while (*s && *s != '\n' && (size_t) (t - tmp_line) < sizeof (tmp_line)-1 && s < top)
*t++ = *s++;
*t = 0;
return tmp_line;
}
/* The basename routine */
const char *
x_basename (const char *s)
{
const char *where;
return ((where = strrchr (s, PATH_SEP))) ? where + 1 : s;
}
const char *
unix_error_string (int error_num)
{
static char buffer [BUF_LARGE];
gchar *strerror_currentlocale;
strerror_currentlocale = g_locale_from_utf8(g_strerror (error_num), -1, NULL, NULL, NULL);
g_snprintf (buffer, sizeof (buffer), "%s (%d)",
strerror_currentlocale, error_num);
g_free(strerror_currentlocale);
return buffer;
}
const char *
skip_separators (const char *s)
{
const char *su = s;
for (;*su; str_cnext_char (&su))
if (*su != ' ' && *su != '\t' && *su != ',') break;
return su;
}
const char *
skip_numbers (const char *s)
{
const char *su = s;
for (;*su; str_cnext_char (&su))
if (!str_isdigit (su)) break;
return su;
}
/* Remove all control sequences from the argument string. We define
* "control sequence", in a sort of pidgin BNF, as follows:
*
* control-seq = Esc non-'['
* | Esc '[' (0 or more digits or ';' or '?') (any other char)
*
* This scheme works for all the terminals described in my termcap /
* terminfo databases, except the Hewlett-Packard 70092 and some Wyse
* terminals. If I hear from a single person who uses such a terminal
* with MC, I'll be glad to add support for it. (Dugan)
* Non-printable characters are also removed.
*/
char *
strip_ctrl_codes (char *s)
{
char *w; /* Current position where the stripped data is written */
char *r; /* Current position where the original data is read */
char *n;
if (!s)
return 0;
for (w = s, r = s; *r; ) {
if (*r == ESC_CHAR) {
/* Skip the control sequence's arguments */ ;
/* '(' need to avoid strange 'B' letter in *Suse (if mc runs under root user) */
if (*(++r) == '[' || *r == '(') {
/* strchr() matches trailing binary 0 */
while (*(++r) && strchr ("0123456789;?", *r));
} else
if (*r == ']') {
/*
* Skip xterm's OSC (Operating System Command)
* http://www.xfree86.org/current/ctlseqs.html
* OSC P s ; P t ST
* OSC P s ; P t BEL
*/
char * new_r = r;
for (; *new_r; ++new_r)
{
switch (*new_r)
{
/* BEL */
case '\a':
r = new_r;
goto osc_out;
case ESC_CHAR:
/* ST */
if (*(new_r + 1) == '\\')
{
r = new_r + 1;
goto osc_out;
}
}
}
osc_out:;
}
/*
* Now we are at the last character of the sequence.
* Skip it unless it's binary 0.
*/
if (*r)
r++;
continue;
}
n = str_get_next_char (r);
if (str_isprint (r)) {
memmove (w, r, n - r);
w+= n - r;
}
r = n;
}
*w = 0;
return s;
}
#ifndef ENABLE_VFS
char *
get_current_wd (char *buffer, int size)
{
char *p;
int len;
p = g_get_current_dir ();
len = strlen(p) + 1;
if (len > size) {
g_free (p);
return NULL;
}
memcpy (buffer, p, len);
g_free (p);
return buffer;
}
#endif /* !ENABLE_VFS */
enum compression_type
get_compression_type (int fd, const char * name)
{
unsigned char magic[16];
size_t str_len;
/* Read the magic signature */
if (mc_read (fd, (char *) magic, 4) != 4)
return COMPRESSION_NONE;
/* GZIP_MAGIC and OLD_GZIP_MAGIC */
if (magic[0] == 037 && (magic[1] == 0213 || magic[1] == 0236)) {
return COMPRESSION_GZIP;
}
/* PKZIP_MAGIC */
if (magic[0] == 0120 && magic[1] == 0113 && magic[2] == 003
&& magic[3] == 004) {
/* Read compression type */
mc_lseek (fd, 8, SEEK_SET);
if (mc_read (fd, (char *) magic, 2) != 2)
return COMPRESSION_NONE;
/* Gzip can handle only deflated (8) or stored (0) files */
if ((magic[0] != 8 && magic[0] != 0) || magic[1] != 0)
return COMPRESSION_NONE;
/* Compatible with gzip */
return COMPRESSION_GZIP;
}
/* PACK_MAGIC and LZH_MAGIC and compress magic */
if (magic[0] == 037
&& (magic[1] == 036 || magic[1] == 0240 || magic[1] == 0235)) {
/* Compatible with gzip */
return COMPRESSION_GZIP;
}
/* BZIP and BZIP2 files */
if ((magic[0] == 'B') && (magic[1] == 'Z') &&
(magic[3] >= '1') && (magic[3] <= '9')) {
switch (magic[2]) {
case '0':
return COMPRESSION_BZIP;
case 'h':
return COMPRESSION_BZIP2;
}
}
/* Support for LZMA (only utils format with magic in header).
* This is the default format of LZMA utils 4.32.1 and later. */
if (mc_read(fd, (char *) magic+4, 2) != 2)
return COMPRESSION_NONE;
/* LZMA utils format */
if (
magic[0] == 0xFF
&& magic[1] == 'L'
&& magic[2] == 'Z'
&& magic[3] == 'M'
&& magic[4] == 'A'
&& magic[5] == 0x00
)
return COMPRESSION_LZMA;
/* XZ compression magic */
if (
magic[0] == 0xFD
&& magic[1] == 0x37
&& magic[2] == 0x7A
&& magic[3] == 0x58
&& magic[4] == 0x5A
&& magic[5] == 0x00
)
return COMPRESSION_XZ;
str_len = strlen(name);
/* HACK: we must belive to extention of LZMA file :) ...*/
if ( (str_len > 5 && strcmp(&name[str_len-5],".lzma") == 0) ||
(str_len > 4 && strcmp(&name[str_len-4],".tlz") == 0))
return COMPRESSION_LZMA;
return COMPRESSION_NONE;
}
const char *
decompress_extension (int type)
{
switch (type){
case COMPRESSION_GZIP: return "#ugz";
case COMPRESSION_BZIP: return "#ubz";
case COMPRESSION_BZIP2: return "#ubz2";
case COMPRESSION_LZMA: return "#ulzma";
case COMPRESSION_XZ: return "#uxz";
}
/* Should never reach this place */
fprintf (stderr, "Fatal: decompress_extension called with an unknown argument\n");
return 0;
}
/* Hooks */
void
add_hook (Hook **hook_list, void (*hook_fn)(void *), void *data)
{
Hook *new_hook = g_new (Hook, 1);
new_hook->hook_fn = hook_fn;
new_hook->next = *hook_list;
new_hook->hook_data = data;
*hook_list = new_hook;
}
void
execute_hooks (Hook *hook_list)
{
Hook *new_hook = 0;
Hook *p;
/* We copy the hook list first so tahat we let the hook
* function call delete_hook
*/
while (hook_list){
add_hook (&new_hook, hook_list->hook_fn, hook_list->hook_data);
hook_list = hook_list->next;
}
p = new_hook;
while (new_hook){
(*new_hook->hook_fn)(new_hook->hook_data);
new_hook = new_hook->next;
}
for (hook_list = p; hook_list;){
p = hook_list;
hook_list = hook_list->next;
g_free (p);
}
}
void
delete_hook (Hook **hook_list, void (*hook_fn)(void *))
{
Hook *current, *new_list, *next;
new_list = 0;
for (current = *hook_list; current; current = next){
next = current->next;
if (current->hook_fn == hook_fn)
g_free (current);
else
add_hook (&new_list, current->hook_fn, current->hook_data);
}
*hook_list = new_list;
}
int
hook_present (Hook *hook_list, void (*hook_fn)(void *))
{
Hook *p;
for (p = hook_list; p; p = p->next)
if (p->hook_fn == hook_fn)
return 1;
return 0;
}
void
wipe_password (char *passwd)
{
char *p = passwd;
if (!p)
return;
for (;*p ; p++)
*p = 0;
g_free (passwd);
}
/* Convert "\E" -> esc character and ^x to control-x key and ^^ to ^ key */
/* Returns a newly allocated string */
char *
convert_controls (const char *p)
{
char *valcopy = g_strdup (p);
char *q;
/* Parse the escape special character */
for (q = valcopy; *p;){
if (*p == '\\'){
p++;
if ((*p == 'e') || (*p == 'E')){
p++;
*q++ = ESC_CHAR;
}
} else {
if (*p == '^'){
p++;
if (*p == '^')
*q++ = *p++;
else {
char c = (*p | 0x20);
if (c >= 'a' && c <= 'z') {
*q++ = c - 'a' + 1;
p++;
} else if (*p)
p++;
}
} else
*q++ = *p++;
}
}
*q = 0;
return valcopy;
}
static char *
resolve_symlinks (const char *path)
{
char *buf, *buf2, *q, *r, c;
int len;
struct stat mybuf;
const char *p;
if (*path != PATH_SEP)
return NULL;
r = buf = g_malloc (MC_MAXPATHLEN);
buf2 = g_malloc (MC_MAXPATHLEN);
*r++ = PATH_SEP;
*r = 0;
p = path;
for (;;) {
q = strchr (p + 1, PATH_SEP);
if (!q) {
q = strchr (p + 1, 0);
if (q == p + 1)
break;
}
c = *q;
*q = 0;
if (mc_lstat (path, &mybuf) < 0) {
g_free (buf);
g_free (buf2);
*q = c;
return NULL;
}
if (!S_ISLNK (mybuf.st_mode))
strcpy (r, p + 1);
else {
len = mc_readlink (path, buf2, MC_MAXPATHLEN - 1);
if (len < 0) {
g_free (buf);
g_free (buf2);
*q = c;
return NULL;
}
buf2 [len] = 0;
if (*buf2 == PATH_SEP)
strcpy (buf, buf2);
else
strcpy (r, buf2);
}
canonicalize_pathname (buf);
r = strchr (buf, 0);
if (!*r || *(r - 1) != PATH_SEP) {
*r++ = PATH_SEP;
*r = 0;
}
*q = c;
p = q;
if (!c)
break;
}
if (!*buf)
strcpy (buf, PATH_SEP_STR);
else if (*(r - 1) == PATH_SEP && r != buf + 1)
*(r - 1) = 0;
g_free (buf2);
return buf;
}
static gboolean
mc_util_write_backup_content(const char *from_file_name, const char *to_file_name)
{
FILE *backup_fd;
char *contents;
gsize length;
if (!g_file_get_contents (from_file_name, &contents, &length, NULL))
return FALSE;
backup_fd = fopen (to_file_name, "w");
if (backup_fd == NULL) {
g_free(contents);
return FALSE;
}
fwrite ( (const void *) contents, length, 1, backup_fd);
fflush(backup_fd);
fclose(backup_fd);
g_free(contents);
return TRUE;
}
/* Finds out a relative path from first to second, i.e. goes as many ..
* as needed up in first and then goes down using second */
char *
diff_two_paths (const char *first, const char *second)
{
char *p, *q, *r, *s, *buf = NULL;
int i, j, prevlen = -1, currlen;
char *my_first = NULL, *my_second = NULL;
my_first = resolve_symlinks (first);
if (my_first == NULL)
return NULL;
my_second = resolve_symlinks (second);
if (my_second == NULL) {
g_free (my_first);
return NULL;
}
for (j = 0; j < 2; j++) {
p = my_first;
q = my_second;
for (;;) {
r = strchr (p, PATH_SEP);
s = strchr (q, PATH_SEP);
if (!r || !s)
break;
*r = 0; *s = 0;
if (strcmp (p, q)) {
*r = PATH_SEP; *s = PATH_SEP;
break;
} else {
*r = PATH_SEP; *s = PATH_SEP;
}
p = r + 1;
q = s + 1;
}
p--;
for (i = 0; (p = strchr (p + 1, PATH_SEP)) != NULL; i++);
currlen = (i + 1) * 3 + strlen (q) + 1;
if (j) {
if (currlen < prevlen)
g_free (buf);
else {
g_free (my_first);
g_free (my_second);
return buf;
}
}
p = buf = g_malloc (currlen);
prevlen = currlen;
for (; i >= 0; i--, p += 3)
strcpy (p, "../");
strcpy (p, q);
}
g_free (my_first);
g_free (my_second);
return buf;
}
/* If filename is NULL, then we just append PATH_SEP to the dir */
char *
concat_dir_and_file (const char *dir, const char *file)
{
int i = strlen (dir);
if (dir [i-1] == PATH_SEP)
return g_strconcat (dir, file, (char *) NULL);
else
return g_strconcat (dir, PATH_SEP_STR, file, (char *) NULL);
}
/* Append text to GList, remove all entries with the same text */
GList *
list_append_unique (GList *list, char *text)
{
GList *lc_link;
/*
* Go to the last position and traverse the list backwards
* starting from the second last entry to make sure that we
* are not removing the current link.
*/
list = g_list_append (list, text);
list = g_list_last (list);
lc_link = g_list_previous (list);
while (lc_link != NULL) {
GList *newlink;
newlink = g_list_previous (lc_link);
if (strcmp ((char *) lc_link->data, text) == 0) {
GList *tmp;
g_free (lc_link->data);
tmp = g_list_remove_link (list, lc_link);
g_list_free_1 (lc_link);
}
lc_link = newlink;
}
return list;
}
/* Following code heavily borrows from libiberty, mkstemps.c */
/* Number of attempts to create a temporary file */
#ifndef TMP_MAX
#define TMP_MAX 16384
#endif /* !TMP_MAX */
/*
* Arguments:
* pname (output) - pointer to the name of the temp file (needs g_free).
* NULL if the function fails.
* prefix - part of the filename before the random part.
* Prepend $TMPDIR or /tmp if there are no path separators.
* suffix - if not NULL, part of the filename after the random part.
*
* Result:
* handle of the open file or -1 if couldn't open any.
*/
int
mc_mkstemps (char **pname, const char *prefix, const char *suffix)
{
static const char letters[]
= "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
static unsigned long value;
struct timeval tv;
char *tmpbase;
char *tmpname;
char *XXXXXX;
int count;
if (strchr (prefix, PATH_SEP) == NULL) {
/* Add prefix first to find the position of XXXXXX */
tmpbase = concat_dir_and_file (mc_tmpdir (), prefix);
} else {
tmpbase = g_strdup (prefix);
}
tmpname = g_strconcat (tmpbase, "XXXXXX", suffix, (char *) NULL);
*pname = tmpname;
XXXXXX = &tmpname[strlen (tmpbase)];
g_free (tmpbase);
/* Get some more or less random data. */
gettimeofday (&tv, NULL);
value += (tv.tv_usec << 16) ^ tv.tv_sec ^ getpid ();
for (count = 0; count < TMP_MAX; ++count) {
unsigned long v = value;
int fd;
/* Fill in the random bits. */
XXXXXX[0] = letters[v % 62];
v /= 62;
XXXXXX[1] = letters[v % 62];
v /= 62;
XXXXXX[2] = letters[v % 62];
v /= 62;
XXXXXX[3] = letters[v % 62];
v /= 62;
XXXXXX[4] = letters[v % 62];
v /= 62;
XXXXXX[5] = letters[v % 62];
fd = open (tmpname, O_RDWR | O_CREAT | O_TRUNC | O_EXCL,
S_IRUSR | S_IWUSR);
if (fd >= 0) {
/* Successfully created. */
return fd;
}
/* This is a random value. It is only necessary that the next
TMP_MAX values generated by adding 7777 to VALUE are different
with (module 2^32). */
value += 7777;
}
/* Unsuccessful. Free the filename. */
g_free (tmpname);
*pname = NULL;
return -1;
}
/*
* Read and restore position for the given filename.
* If there is no stored data, return line 1 and col 0.
*/
void
load_file_position (const char *filename, long *line, long *column, off_t *offset)
{
char *fn;
FILE *f;
char buf[MC_MAXPATHLEN + 20];
int len;
/* defaults */
*line = 1;
*column = 0;
*offset = 0;
/* open file with positions */
fn = g_build_filename (home_dir, MC_USERCONF_DIR, MC_FILEPOS_FILE, NULL);
f = fopen (fn, "r");
g_free (fn);
if (!f)
return;
len = strlen (filename);
while (fgets (buf, sizeof (buf), f)) {
const char *p;
gchar **pos_tokens;
/* check if the filename matches the beginning of string */
if (strncmp (buf, filename, len) != 0)
continue;
/* followed by single space */
if (buf[len] != ' ')
continue;
/* and string without spaces */
p = &buf[len + 1];
if (strchr (p, ' '))
continue;
pos_tokens = g_strsplit_set (p, ";", 3);
if (pos_tokens[0] != NULL) {
*line = strtol (pos_tokens[0], NULL, 10);
if (pos_tokens[1] != NULL) {
*column = strtol (pos_tokens[1], NULL, 10);
if (pos_tokens[2] != NULL)
*offset = strtoll (pos_tokens[2], NULL, 10);
else
*offset = 0;
} else {
*column = 0;
*offset = 0;
}
} else {
*line = 1;
*column = 0;
*offset = 0;
}
g_strfreev(pos_tokens);
}
fclose (f);
}
/* Save position for the given file */
#define TMP_SUFFIX ".tmp"
void
save_file_position (const char *filename, long line, long column, off_t offset)
{
static int filepos_max_saved_entries = 0;
char *fn, *tmp_fn;
FILE *f, *tmp_f;
char buf[MC_MAXPATHLEN + 20];
int i = 1;
gsize len;
if (filepos_max_saved_entries == 0)
filepos_max_saved_entries = mc_config_get_int(mc_main_config, CONFIG_APP_SECTION, "filepos_max_saved_entries", 1024);
fn = g_build_filename (home_dir, MC_USERCONF_DIR, MC_FILEPOS_FILE, NULL);
if (fn == NULL)
goto early_error;
len = strlen (filename);
mc_util_make_backup_if_possible (fn, TMP_SUFFIX);
/* open file */
f = fopen (fn, "w");
if (f == NULL)
goto open_target_error;
tmp_fn = g_strdup_printf("%s" TMP_SUFFIX ,fn);
tmp_f = fopen (tmp_fn, "r");
if (tmp_f == NULL)
goto open_source_error;
/* put the new record */
if (line != 1 || column != 0) {
if (fprintf (f, "%s %ld;%ld;%lli\n", filename, line, column, offset) < 0)
goto write_position_error;
}
while (fgets (buf, sizeof (buf), tmp_f)) {
if (
buf[len] == ' ' &&
strncmp (buf, filename, len) == 0 &&
!strchr (&buf[len + 1], ' ')
)
continue;
fprintf (f, "%s", buf);
if (++i > filepos_max_saved_entries)
break;
}
fclose (tmp_f);
g_free(tmp_fn);
fclose (f);
mc_util_unlink_backup_if_possible (fn, TMP_SUFFIX);
g_free (fn);
return;
write_position_error:
fclose (tmp_f);
open_source_error:
g_free(tmp_fn);
fclose (f);
mc_util_restore_from_backup_if_possible (fn, TMP_SUFFIX);
open_target_error:
g_free (fn);
early_error:
return;
}
#undef TMP_SUFFIX
extern const char *
cstrcasestr (const char *haystack, const char *needle)
{
char *nee = str_create_search_needle (needle, 0);
const char *result = str_search_first (haystack, nee, 0);
str_release_search_needle (nee, 0);
return result;
}
const char *
cstrstr (const char *haystack, const char *needle)
{
return strstr(haystack, needle);
}
extern char *
str_unconst (const char *s)
{
return (char *) s;
}
#define ASCII_A (0x40 + 1)
#define ASCII_Z (0x40 + 26)
#define ASCII_a (0x60 + 1)
#define ASCII_z (0x60 + 26)
extern int
ascii_alpha_to_cntrl (int ch)
{
if ((ch >= ASCII_A && ch <= ASCII_Z)
|| (ch >= ASCII_a && ch <= ASCII_z)) {
ch &= 0x1f;
}
return ch;
}
const char *
Q_ (const char *s)
{
const char *result, *sep;
result = _(s);
sep = strchr(result, '|');
return (sep != NULL) ? sep + 1 : result;
}
gboolean
mc_util_make_backup_if_possible (const char *file_name, const char *backup_suffix)
{
struct stat stat_buf;
char *backup_path;
gboolean ret;
if (!exist_file (file_name))
return FALSE;
backup_path = g_strdup_printf("%s%s",file_name,backup_suffix);
if (backup_path == NULL)
return FALSE;
ret = mc_util_write_backup_content (file_name, backup_path);
if (ret) {
/* Backup file will have same ownership with main file. */
if (stat (file_name, &stat_buf) == 0)
chmod (backup_path, stat_buf.st_mode);
else
chmod (backup_path, S_IRUSR | S_IWUSR);
}
g_free(backup_path);
return ret;
}
gboolean
mc_util_restore_from_backup_if_possible (const char *file_name, const char *backup_suffix)
{
gboolean ret;
char *backup_path;
backup_path = g_strdup_printf("%s%s",file_name,backup_suffix);
if (backup_path == NULL)
return FALSE;
ret = mc_util_write_backup_content (backup_path, file_name);
g_free(backup_path);
return ret;
}
gboolean
mc_util_unlink_backup_if_possible (const char *file_name, const char *backup_suffix)
{
char *backup_path;
backup_path = g_strdup_printf("%s%s",file_name,backup_suffix);
if (backup_path == NULL)
return FALSE;
if (exist_file (backup_path))
mc_unlink (backup_path);
g_free(backup_path);
return TRUE;
}
/* partly taken from dcigettext.c, returns "" for default locale */
/* value should be freed by calling function g_free() */
char *guess_message_value (void)
{
static const char * const var[] = {
/* Setting of LC_ALL overwrites all other. */
/* Do not use LANGUAGE for check user locale and drowing hints */
"LC_ALL",
/* Next comes the name of the desired category. */
"LC_MESSAGES",
/* Last possibility is the LANG environment variable. */
"LANG",
/* NULL exit loops */
NULL
};
unsigned i = 0;
const char *locale = NULL;
while (var[i] != NULL) {
locale = getenv (var[i]);
if (locale != NULL && locale[0] != '\0')
break;
i++;
}
if (locale == NULL)
locale = "";
return g_strdup (locale);
}
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