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- /* Various utilities
- Copyright (C) 1994, 1995, 1996 the Free Software Foundation.
- 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include <config.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <sys/types.h>
- #ifdef HAVE_UNISTD_H
- #include <unistd.h>
- #endif
- #include <fcntl.h>
- #include <signal.h> /* my_system */
- #include <limits.h> /* INT_MAX */
- #include <sys/time.h> /* select: timeout */
- #include <sys/param.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <stdarg.h>
- #include <errno.h> /* my_system */
- #include <time.h>
- #include <pwd.h>
- #include <grp.h>
- #include <string.h>
- #include <ctype.h>
- #ifdef IS_AIX
- # include <sys/select.h>
- #endif
-
- #ifdef __linux__
- # include <linux/termios.h> /* This is needed for TIOCLINUX */
- # include <sys/ioctl.h>
- #endif
- #include "fs.h"
- #include "fsusage.h"
- #include "mountlist.h"
-
- /* From dialog.h (not wanting to include it as
- it requires including a lot of other files, too) */
- int message (int error, char *header, char *text, ...);
-
- #include "mad.h"
- #if defined(HAVE_RX_H) && defined(HAVE_REGCOMP)
- #include <rx.h>
- #else
- #include "regex.h"
- #endif
- #include "util.h"
- #include "global.h"
- #include "profile.h"
- #include "user.h" /* expand_format */
- #include "../vfs/vfs.h"
-
- /* "$Id: util.c,v 1.17 1995/02/21 19:07:33 miguel Exp $" */
-
- char app_text [] = "Midnight-Commander";
-
- int easy_patterns = 1;
- int align_extensions = 1;
- int tilde_trunc = 1;
-
- #ifndef HAVE_STRDUP
- char *strdup (char *s)
- {
- char *t = malloc (strlen (s)+1);
- strcpy (t, s);
- return t;
- }
- #endif
-
- int is_printable (int c)
- {
- extern int eight_bit_clean;
- extern int full_eight_bits;
-
- c &= 0xff;
- if (eight_bit_clean){
- if (full_eight_bits)
- return (c > 31 && c != 127);
- else
- return ((c >31 && c < 127) || c >= 160);
- } else
- return (c > 31 && c < 127);
- }
-
- /* Returns the message dimensions (lines and columns) */
- int msglen (char *text, int *lines)
- {
- int max = 0;
- int line_len = 0;
-
- for (*lines = 1;*text; text++){
- if (*text == '\n'){
- line_len = 0;
- (*lines)++;
- } else {
- line_len++;
- if (line_len > max)
- max = line_len;
- }
- }
- return max;
- }
-
- char *trim (char *s, char *d, int len)
- {
- int source_len = strlen (s);
-
- if (source_len > len){
- strcpy (d, s+(source_len-len));
- d [0] = '.';
- d [1] = '.';
- d [2] = '.';
- } else
- strcpy (d, s);
- return d;
- }
-
- /* If passed an empty txt (this usually means that there is an error)
- * in the upper layers, we return "/"
- */
- char *name_trunc (char *txt, int trunc_len)
- {
- static char x [MC_MAXPATHLEN+MC_MAXPATHLEN];
- int txt_len;
- char *p;
-
- if (!txt)
- txt = PATH_SEP_STR;
-
- if (trunc_len > sizeof (x)-1){
- fprintf (stderr, "name_trunc: too big");
- trunc_len = sizeof (x)-1;
- }
- txt_len = strlen (txt);
- if (txt_len <= trunc_len)
- strcpy (x, txt);
- else if (tilde_trunc){
- int y = trunc_len % 2;
- strncpy (x, txt, (trunc_len/2)+y);
- strncpy (x+(trunc_len/2)+y, txt+txt_len-(trunc_len/2), trunc_len/2);
- x [(trunc_len/2)+y] = '~';
- } else {
- strncpy (x, txt, trunc_len-1);
- x [trunc_len-1] = '>';
- }
- x [trunc_len] = 0;
- for (p = x; *p; p++)
- if (!is_printable (*p))
- *p = '?';
- return x;
- }
-
- char *size_trunc (long int size)
- {
- static char x [30];
- long int divisor = 1;
- char *xtra = "";
-
- if (size > 999999999L){
- divisor = 1024;
- xtra = "kb";
- if (size/divisor > 999999999L){
- divisor = 1024*1024;
- xtra = "Mb";
- }
- }
- sprintf (x, "%ld%s", (size/divisor), xtra);
- return x;
- }
-
- char *size_trunc_sep (long int size)
- {
- static char x [60];
- int count;
- char *p, *d, *y;
-
- p = y = size_trunc (size);
- p += strlen (p) - 1;
- d = x + sizeof (x) - 1;
- *d-- = 0;
- while (p >= y && isalpha (*p))
- *d-- = *p--;
- for (count = 0; p >= y; count++){
- if (count == 3){
- *d-- = ',';
- count = 0;
- }
- *d-- = *p--;
- }
- d++;
- if (*d == ',')
- d++;
- return d;
- }
-
- 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)
-
- char *string_perm (mode_t mode_bits)
- {
- static char mode [11];
-
- strcpy (mode, "----------");
- if (ismode (mode_bits, S_IFDIR)) mode [0] = 'd';
- #ifdef S_IFSOCK
- if (ismode (mode_bits, S_IFSOCK)) mode [0] = 's';
- #endif
- 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';
- if (ismode (mode_bits, S_ISUID)) mode [3] = (mode [3] == 'x') ? 's' : 'S';
- if (ismode (mode_bits, S_ISGID)) mode [6] = (mode [6] == 'x') ? 's' : 'S';
- if (ismode (mode_bits, S_IFCHR)) mode [0] = 'c';
- if (ismode (mode_bits, S_IFBLK)) mode [0] = 'b';
- if (ismode (mode_bits, S_ISVTX)) mode [9] = (mode [9] == 'x') ? 't' : 'T';
- if (ismode (mode_bits, S_IFLNK)) mode [0] = 'l';
- if (ismode (mode_bits, S_IFIFO)) mode [0] = 's';
- return mode;
- }
-
- char *strip_home(char *dir)
- {
- static char newdir [MC_MAXPATHLEN], *p, *q;
-
- if (home_dir && !strncmp (dir, home_dir, strlen (home_dir))){
- newdir [0] = '~';
- strcpy (&newdir [1], &dir [strlen (home_dir)]);
- return newdir;
- }
- #ifdef USE_NETCODE
- else if (!strncmp (dir, "ftp://", 6)) {
- if ((p = strchr (dir + 6, PATH_SEP)) != NULL) {
- *p = 0;
- if ((q = ftpfs_gethome (dir)) == NULL)
- return dir;
- *p = PATH_SEP;
- if (q != NULL && strcmp (q, PATH_SEP_STR) && !strncmp (p, q, strlen (q) - 1)) {
- strncpy (newdir, dir, p - dir);
- strcpy (newdir + (p - dir), "/~");
- strcat (newdir, p + strlen (q) - 1);
- return newdir;
- }
- }
- } else if (!strncmp (dir, "mc:", 3)) {
- if ((p = strchr (dir + 3, PATH_SEP)) != NULL) {
- *p = 0;
- if ((q = mcfs_gethome (dir)) == NULL)
- return dir;
- *p = PATH_SEP;
- if (q != NULL && strcmp (q, PATH_SEP_STR) && !strncmp (p, q, strlen (q) - 1)) {
- strncpy (newdir, dir, p - dir);
- strcpy (newdir + (p - dir), "/~");
- strcat (newdir, p + strlen (q) - 1);
- free (q);
- return newdir;
- } else if (q != NULL) {
- free (q);
- }
- }
- }
- #endif
- return dir;
- }
-
- static char *maybe_start_group (char *d, int do_group, int *was_wildcard)
- {
- if (!do_group)
- return d;
- if (*was_wildcard)
- return d;
- *was_wildcard = 1;
- *d++ = '\\';
- *d++ = '(';
- return d;
- }
-
- static char *maybe_end_group (char *d, int do_group, int *was_wildcard)
- {
- if (!do_group)
- return d;
- if (!*was_wildcard)
- return d;
- *was_wildcard = 0;
- *d++ = '\\';
- *d++ = ')';
- return d;
- }
-
- /* If shell patterns are on converts a shell pattern to a regular
- expression. Called by regexp_match and mask_rename. */
- /* Shouldn't we support [a-fw] type wildcards as well ?? */
- char *convert_pattern (char *pattern, int match_type, int do_group)
- {
- char *s, *d;
- static char new_pattern [100];
- int was_wildcard = 0;
-
- if (easy_patterns){
- d = new_pattern;
- if (match_type == match_file)
- *d++ = '^';
- for (s = pattern; *s; s++, d++){
- switch (*s){
- case '*':
- d = maybe_start_group (d, do_group, &was_wildcard);
- *d++ = '.';
- *d = '*';
- break;
-
- case '?':
- d = maybe_start_group (d, do_group, &was_wildcard);
- *d = '.';
- break;
-
- case '.':
- d = maybe_end_group (d, do_group, &was_wildcard);
- *d++ = '\\';
- *d = '.';
- break;
-
- default:
- d = maybe_end_group (d, do_group, &was_wildcard);
- *d = *s;
- break;
- }
- }
- d = maybe_end_group (d, do_group, &was_wildcard);
- if (match_type == match_file)
- *d++ = '$';
- *d = 0;
- return new_pattern;
- } else
- return pattern;
- }
-
- /* 1 if string matches
- 0 if string doesn't match
- -1 if error in pattern */
-
- int regexp_match (char *pattern, char *string, int match_type)
- {
- static regex_t r;
- static char *old_pattern = NULL;
- static int old_type;
- int rval;
-
- if (!old_pattern || strcmp (old_pattern, pattern) || old_type != match_type){
- if (old_pattern){
- regfree (&r);
- free (old_pattern);
- }
- pattern = convert_pattern (pattern, match_type, 0);
- if (regcomp (&r, pattern, REG_EXTENDED|REG_NOSUB))
- return -1;
- old_pattern = strdup (pattern);
- old_type = match_type;
- }
- rval = !regexec (&r, string, 0, NULL, 0);
- return rval;
- }
-
- char *extension (char *filename)
- {
- char *d;
-
- if (!strlen (filename))
- return "";
-
- d = filename + strlen (filename) - 1;
- for (;d >= filename; d--){
- if (*d == '.')
- return d+1;
- }
- return "";
- }
-
- /* This routine uses the fact that x is at most 14 chars or so */
- char *split_extension (char *x, int pad)
- {
- return x;
-
- /* Buggy code
- if (!align_extensions)
- return x;
-
- if (strlen (x) >= pad)
- return x;
-
- if ((ext = extension (x)) == x || *ext == 0)
- return x;
-
- strcpy (xbuf, x);
- for (i = strlen (x); i < pad; i++)
- xbuf [i] = ' ';
- xbuf [pad] = 0;
-
- l = strlen (ext);
- for (i = 0; i < l; i++)
- xbuf [pad-i] = *(ext+l-i-1);
- for (i = xbuf + (ext - x); i <
- return xbuf; */
- }
-
- #ifndef HAVE_MAD
- void *do_xmalloc (int size)
- {
- void *m = malloc (size);
-
- if (!m){
- fprintf (stderr, "memory exhausted\n");
- exit (1);
- }
- return m;
- }
- #endif /* HAVE_MAD */
-
- int get_int (char *file, char *key, int def)
- {
- return GetPrivateProfileInt (app_text, key, def, file);
- }
-
- int set_int (char *file, char *key, int value)
- {
- char buffer [6];
-
- sprintf (buffer, "%d", value);
- return WritePrivateProfileString (app_text, key, buffer, file);
- }
-
- int exist_file (char *name)
- {
- return access (name, R_OK) == 0;
- }
-
- char *load_file (char *filename)
- {
- FILE *data_file;
- struct stat s;
- char *data;
- long read_size;
-
- if (stat (filename, &s) != 0){
- return 0;
- }
- if ((data_file = fopen (filename, "r")) == NULL){
- return 0;
- }
- data = (char *) xmalloc (s.st_size+1, "util, load_file");
- read_size = fread (data, 1, s.st_size, data_file);
- data [read_size] = 0;
- fclose (data_file);
-
- if (read_size > 0)
- return data;
- else
- return 0;
- }
-
- char *file_date (time_t when)
- {
- static char timebuf [40];
- time_t current_time = time ((time_t) 0);
-
- #ifdef _OS_NT
- char *p;
-
- p = ctime (&when);
- p ? strcpy (timebuf, p) : p = "-----";
- #else
- strcpy (timebuf, ctime (&when));
- #endif
- 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. */
- strcpy (timebuf + 11, timebuf + 19);
- }
- timebuf[16] = 0;
- return &timebuf [4];
- }
-
- /* Like file_date, but packs the data to fit in 10 columns */
- char *file_date_pck (time_t when)
- {
- /* FIXME: Should return only 10 chars, not 14 */
- return file_date (when);
- }
-
- char *extract_line (char *s, char *top)
- {
- static char tmp_line [500];
- char *t = tmp_line;
-
- while (*s && *s != '\n' && (t - tmp_line) < sizeof (tmp_line)-1 && s < top)
- *t++ = *s++;
- *t = 0;
- return tmp_line;
- }
-
- /* FIXME: I should write a faster version of this (Aho-Corasick stuff) */
- char *icase_search (char *text, char *data)
- {
- char *d = text;
- char *e = data;
- register char c, c1;
-
- for (;*e; e++){
- c = *d | 0x20;
- c1 = *e | 0x20;
- if (c == c1 && ((c >= 'a' && c <= 'z' && c1 >= 'a' && c1 <= 'z') ||
- *d == *e))
- d++;
- else {
- e -= d - text;
- d = text;
- }
- if (!*d)
- return e+1;
- }
- return 0;
- }
-
- /* The basename routine */
- char *x_basename (char *s)
- {
- char *where;
- return ((where = strrchr (s, PATH_SEP)))? where + 1 : s;
- }
-
- char *get_full_name (char *dir, char *file)
- {
- int i;
- char *d = malloc (strlen (dir) + strlen (file) + 2);
-
- strcpy (d, dir);
- i = strlen (dir);
- if (dir [i - 1] != PATH_SEP || dir [i] != 0)
- strcat (d, PATH_SEP_STR);
- file = x_basename (file);
- strcat (d, file);
- return d;
- }
-
- void my_putenv (char *name, char *data)
- {
- char *full;
-
- full = xmalloc (strlen (name) + strlen (data) + 2, "util, my_putenv");
- sprintf (full, "%s=%s", name, data);
- putenv (full);
- /* WARNING: NEVER FREE THE full VARIABLE!!!!!!!!!!!!!!!!!!!!!!!! */
- /* It is used by putenv. Freeing it will corrupt the environment */
- }
-
- #if 0
- static void my_putenv_expand (char *name, char macro_code)
- {
- char *data;
-
- data = expand_format (macro_code);
- my_putenv (name, data);
- free (data);
- }
-
- /* Puts some status information in to the environment so that
- processes to be executed can access it. */
- static void prepare_environment (void)
- {
- my_putenv_expand ("MC_CURRENT_DIR", 'd');
- my_putenv_expand ("MC_OTHER_DIR", 'D');
- my_putenv_expand ("MC_CURRENT_FILE", 'f');
- my_putenv_expand ("MC_OTHER_FILE", 'F');
- my_putenv_expand ("MC_CURRENT_TAGGED", 't');
- my_putenv_expand ("MC_OTHER_TAGGED", 'T');
- /* MC_CONTROL_FILE has been added to environment on startup */
- }
- #endif
-
- /* Since ncurses uses a handler that automatically refreshes the */
- /* screen after a SIGCONT, and we don't want this behavior when */
- /* spawning a child, we save the original handler here */
- void save_stop_handler (void)
- {
- sigaction (SIGTSTP, NULL, &startup_handler);
- }
-
- char *unix_error_string (int error_num)
- {
- static char buffer [256];
- char *error_msg;
-
- #ifdef HAVE_STRERROR
- error_msg = strerror (error_num);
- #else
- extern int sys_nerr;
- extern char *sys_errlist [];
- if ((0 <= error_num) && (error_num < sys_nerr))
- error_msg = sys_errlist[error_num];
- else
- error_msg = "strange errno";
- #endif
- sprintf (buffer, "%s (%d)", error_msg, error_num);
- return buffer;
- }
-
- char *copy_strings (char *first,...)
- {
- va_list ap;
- int len;
- char *data, *result;
-
- if (!first)
- return 0;
-
- len = strlen (first);
- va_start (ap, first);
-
- while ((data = va_arg (ap, char *))!=0)
- len += strlen (data);
-
- len++;
-
- result = xmalloc (len, "copy_strings");
- va_end (ap);
- va_start (ap, first);
- strcpy (result, first);
- while ((data = va_arg (ap, char *)) != 0)
- strcat (result, data);
- va_end (ap);
-
- return result;
- }
-
- long blocks2kilos (int blocks, int bsize)
- {
- if (bsize > 1024){
- return blocks * (bsize / 1024);
- } else if (bsize < 1024){
- return blocks / (1024 /bsize);
- } else
- return blocks;
- }
-
- static struct mount_entry *mount_list;
-
- void init_my_statfs (void)
- {
- #ifndef NO_INFOMOUNT
- mount_list = read_filesystem_list (1, 1);
- #endif
- }
-
- void my_statfs (struct my_statfs *myfs_stats, char *path)
- {
- int i, len = 0;
-
- #ifndef NO_INFOMOUNT
- struct mount_entry *entry = NULL;
- struct mount_entry *temp = mount_list;
- struct fs_usage fs_use;
-
- while (temp){
- i = strlen (temp->me_mountdir);
- if (i > len && (strncmp (path, temp->me_mountdir, i) == 0))
- if (!entry || (path [i] == PATH_SEP || path [i] == 0)){
- len = i;
- entry = temp;
- }
- temp = temp->me_next;
- }
-
- if (entry){
- get_fs_usage (entry->me_mountdir, &fs_use);
-
- myfs_stats->type = entry->me_dev;
- myfs_stats->typename = entry->me_type;
- myfs_stats->mpoint = entry->me_mountdir;
- myfs_stats->device = entry->me_devname;
- myfs_stats->avail = getuid () ? fs_use.fsu_bavail/2 : fs_use.fsu_bfree/2;
- myfs_stats->total = fs_use.fsu_blocks/2;
- myfs_stats->nfree = fs_use.fsu_ffree;
- myfs_stats->nodes = fs_use.fsu_files;
- } else
- #endif
- #ifdef _OS_NT
- DWORD lpSectorsPerCluster, lpBytesPerSector, lpFreeClusters, lpClusters;
- DWORD lpMaximumComponentLength, dw, lpFileSystemFlags;
- static char lpVolumeNameBuffer[256], lpFileSystemNameBuffer[30];
-
- GetDiskFreeSpace(NULL, &lpSectorsPerCluster, &lpBytesPerSector,
- &lpFreeClusters, &lpClusters);
-
- /* KBytes available */
- myfs_stats->avail = lpSectorsPerCluster * lpBytesPerSector * lpFreeClusters / 1024;
-
- /* KBytes total */
- myfs_stats->total = lpSectorsPerCluster * lpBytesPerSector * lpClusters / 1024;
- myfs_stats->nfree = lpFreeClusters;
- myfs_stats->nodes = lpClusters;
-
- GetVolumeInformation(NULL, lpVolumeNameBuffer, 255, NULL,
- &lpMaximumComponentLength, &lpFileSystemFlags,
- lpFileSystemNameBuffer, 30);
-
- myfs_stats->mpoint = lpFileSystemNameBuffer;
- myfs_stats->device = lpVolumeNameBuffer;
-
-
- myfs_stats->type = GetDriveType(NULL);
- switch (myfs_stats->type) {
- /*
- * mmm. DeviceIoControl may fail if you are not root case
- * F5_1Pt2_512, 5.25", 1.2MB, 512 bytes/sector
- * myfs_stats->typename = "5.25\" 1.2MB"; break; case
- * F3_1Pt44_512, 3.5", 1.44MB, 512 bytes/sector
- * myfs_stats->typename = "3.5\" 1.44MB"; break; case
- * F3_2Pt88_512, 3.5", 2.88MB, 512 bytes/sector
- * myfs_stats->typename = "3.5\" 2.88MB"; break; case
- * F3_20Pt8_512, 3.5", 20.8MB, 512 bytes/sector
- * myfs_stats->typename = "3.5\" 20.8MB"; break; case
- * F3_720_512, 3.5", 720KB, 512 bytes/sector
- * myfs_stats->typename = "3.5\" 720MB"; break; case
- * F5_360_512, 5.25", 360KB, 512 bytes/sector
- * myfs_stats->typename = "5.25\" 360KB"; break; case
- * F5_320_512, 5.25", 320KB, 512 bytes/sector
- * case F5_320_1024, 5.25", 320KB, 1024
- * bytes/sector myfs_stats->typename = "5.25\" 320KB"; break;
- * case F5_180_512, 5.25", 180KB, 512
- * bytes/sector myfs_stats->typename = "5.25\" 180KB"; break;
- * case F5_160_512, 5.25", 160KB, 512
- * bytes/sector myfs_stats->typename = "5.25\" 160KB"; break;
- * case RemovableMedia, Removable media other than
- * floppy myfs_stats->typename = "Removable"; break; case
- * FixedMedia Fixed hard disk media
- * myfs_stats->typename = "Hard Disk"; break; case Unknown:
- * Format is unknown
- */
- case DRIVE_REMOVABLE:
- myfs_stats->typename = "Removable";
- break;
- case DRIVE_FIXED:
- myfs_stats->typename = "Hard Disk";
- break;
- case DRIVE_REMOTE:
- myfs_stats->typename = "Networked";
- break;
- case DRIVE_CDROM:
- myfs_stats->typename = "CD-ROM";
- break;
- case DRIVE_RAMDISK:
- myfs_stats->typename = "RAM disk";
- break;
- default:
- myfs_stats->typename = "unknown";
- break;
- };
-
- if (0)
- #endif
- {
- myfs_stats->type = 0;
- myfs_stats->mpoint = "unknown";
- myfs_stats->device = "unknown";
- myfs_stats->avail = 0;
- myfs_stats->total = 0;
- myfs_stats->nfree = 0;
- myfs_stats->nodes = 0;
- }
- }
-
- char *skip_separators (char *s)
- {
- for (;*s; s++)
- if (*s != ' ' && *s != '\t' && *s != ',')
- break;
- return s;
- }
-
- char *skip_numbers (char *s)
- {
- for (;*s; s++)
- if (!isdigit (*s))
- break;
- return s;
- }
-
- /* 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)
- */
-
- char *strip_ctrl_codes (char *s)
- {
- int i; /* Current length of the string's correct (stripped) prefix */
- int j; /* Number of control characters we have skipped so far */
-
- if (!s)
- return 0;
-
- for (i = 0, j = 0; s [i+j]; ++i)
- if (s [i+j] != ESC_CHAR){
- if (j)
- s [i] = s [i+j];
- } else {
- ++j;
- if (s [i+j++] == '[')
- while (strchr ("0123456789;?", s [i+j++]))
- /* Skip the control sequence's arguments */ ;
- --i;
- }
- s[i] = 0;
- return s;
- }
-
- #ifndef HAVE_STRCASECMP
- /* At least one version of HP/UX lacks this */
- /* Assumes ASCII encoding */
- int strcasecmp (char *s, char *d)
- {
- register char result;
-
- while (1){
- if (result = (0x20 | *s) - (0x20 | *d))
- break;
- if (!*s)
- return 0;
- s++;
- d++;
- }
- return result;
- }
- #endif /* HAVE_STRCASECMP */
-
- #ifndef HAVE_VFS
- /* getwd is better than getcwd, the later uses a popen ("pwd"); */
- char *get_current_wd (char *buffer, int size)
- {
- char *p;
-
- #ifdef HAVE_GETWD
- p = (char *) getwd (buffer);
- #else
- p = getcwd (buffer, size);
- #endif
- return p;
- }
- #endif
-
- #define CHECK(x) if (x == -1) return 0;
-
- long get_small_endian_long (int fd)
- {
- unsigned char a, b, c, d;
-
- /* It needs to be read one byte at the time to avoid endianess
- portability problems */
- CHECK (mc_read (fd, &a, 1));
- CHECK (mc_read (fd, &b, 1));
- CHECK (mc_read (fd, &c, 1));
- CHECK (mc_read (fd, &d, 1));
- return (d << 24) | (c << 16) | (b << 8) | a;
- }
-
- /* This function returns 0 if the file is not in gunzip format */
- /* or how much memory must be allocated to load the gziped file */
- /* Warning: this function moves the current file pointer */
- long int is_gunzipable (int fd)
- {
- unsigned char magic [4];
-
- /* Read the magic signature */
- CHECK (mc_read (fd, &magic [0], 1));
- CHECK (mc_read (fd, &magic [1], 1));
- CHECK (mc_read (fd, &magic [2], 1));
- CHECK (mc_read (fd, &magic [3], 1));
-
- /* GZIP_MAGIC and OLD_GZIP_MAGIC */
- if (magic [0] == 037 && (magic [1] == 0213 || magic [1] == 0236)){
- /* Read the uncompressed size of the file */
- mc_lseek (fd, -4, SEEK_END);
- return get_small_endian_long (fd);
- }
-
- /* PKZIP_MAGIC */
- if (magic [0] == 0120 && magic [1] == 0113 && magic [2] == 003 &&
- magic [3] == 004){
- /* Read compression type */
- mc_lseek (fd, 8, SEEK_SET);
- CHECK (mc_read (fd, &magic [0], 1));
- CHECK (mc_read (fd, &magic [1], 1));
- /* Gzip can handle only deflated (8) or stored (0) files */
- if ((magic [0] != 8 && magic [0] != 0) || magic [1] != 0)
- return 0;
- /* Read the uncompressed size of the first file in the archive */
- mc_lseek (fd, 22, SEEK_SET);
- return get_small_endian_long (fd);
- }
-
- /* PACK_MAGIC and LZH_MAGIC and compress magic */
- if (magic [0] == 037 &&
- (magic [1] == 036 || magic [1] == 0240 || magic [1] == 0235)){
-
- /* In case the file is packed, sco lzhed or compress_magic, the */
- /* program guesses that the uncompressed size is (at most) four */
- /* times the length of the compressed size, if the compression */
- /* ratio is more than 4:1 the end of the file is not displayed */
- return 4*mc_lseek (fd, 0, SEEK_END);
- }
- return 0;
- }
-
- /* Hooks */
- void add_hook (Hook **hook_list, void (*hook_fn)(void *), void *data)
- {
- Hook *new_hook = xmalloc (sizeof (Hook), "add_hook");
-
- 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;
- 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)
- 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;
-
- for (;*p ; p++)
- *p = 0;
- free (passwd);
- }
-
- /* Convert "\E" -> esc character and ^x to control-x key and ^^ to ^ key */
- /* Returns a newly allocated string */
- char *convert_controls (char *s)
- {
- char *valcopy = strdup (s);
- char *p, *q;
-
- /* Parse the escape special character */
- for (p = s, q = valcopy; *p;){
- if (*p == '\\'){
- p++;
- if ((*p == 'e') || (*p == 'E')){
- p++;
- *q++ = ESC_CHAR;
- }
- } else {
- if (*p == '^'){
- p++;
- if (*p == '^')
- *q++ = *p++;
- else {
- *p = (*p | 0x20);
- if (*p >= 'a' && *p <= 'z') {
- *q++ = *p++ - 'a' + 1;
- } else
- p++;
- }
- } else
- *q++ = *p++;
- }
- }
- *q++ = 0;
- return valcopy;
- }
-
- /* Reverse the string */
- char *reverse_string (char *string)
- {
- int len = strlen (string);
- int i;
- const int steps = len/2;
-
- for (i = 0; i < steps; i++){
- char c = string [i];
-
- string [i] = string [len-i-1];
- string [len-i-1] = c;
- }
- return string;
- }
-
- char *resolve_symlinks (char *path)
- {
- char *buf, *buf2, *p, *q, *r, c;
- int len;
- struct stat mybuf;
-
- if (*path != PATH_SEP)
- return NULL;
- r = buf = xmalloc (MC_MAXPATHLEN, "resolve symlinks");
- buf2 = xmalloc (MC_MAXPATHLEN, "resolve symlinks");
- *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) {
- free (buf);
- free (buf2);
- *q = c;
- return NULL;
- }
- if (!S_ISLNK (mybuf.st_mode))
- strcpy (r, p + 1);
- else {
- len = mc_readlink (path, buf2, MC_MAXPATHLEN);
- if (len < 0) {
- free (buf);
- 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;
- free (buf2);
- return buf;
- }
-
- /* 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 (char *first, char *second)
- {
- char *p, *q, *r, *s, *buf = 0;
- int i, j, prevlen = -1, currlen;
-
- first = resolve_symlinks (first);
- if (first == NULL)
- return NULL;
- for (j = 0; j < 2; j++) {
- p = first;
- if (j) {
- second = resolve_symlinks (second);
- if (second == NULL) {
- free (first);
- return buf;
- }
- }
- q = second;
- for (;;) {
- r = strchr (p, PATH_SEP);
- s = strchr (q, PATH_SEP);
- if (!r || !s)
- break;
- *r = 0; *s = 0;
- if (strcmp (r, s)) {
- *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 * 3 + strlen (q) + 1;
- if (j) {
- if (currlen < prevlen)
- free (buf);
- else {
- free (first);
- free (second);
- return buf;
- }
- }
- p = buf = xmalloc (currlen, "diff 2 paths");
- prevlen = currlen;
- for (; i >= 0; i--, p += 3)
- strcpy (p, "../");
- strcpy (p, q);
- }
- free (first);
- free (second);
- return buf;
- }
-
- #ifndef HAVE_TRUNCATE
- /* On SCO and Windows NT systems */
- int my_ftruncate (int fd, long size)
- {
- #ifdef _OS_NT
- if(_chsize(fd, size))
- return -1;
- else
- return 0;
- #else
- struct flock lk;
-
- lk.l_whence = 0;
- lk.l_start = size;
- lk.l_len = 0;
-
- return fcntl (fd, F_FREESP, &lk);
- #endif
- }
-
- int truncate (char *path, long size)
- {
- int fd;
- int res;
-
- fd = open (path, O_RDWR, 0);
- if (fd < 0)
- return fd;
- res = my_ftruncate (fd, size);
- if (res < 0)
- return res;
- close (fd);
- return 0;
-
- }
-
- #endif
-
-