/* Various utilities Copyright (C) 1994-2024 Free Software Foundation, Inc. Written by: Miguel de Icaza, 1994, 1995, 1996 Janne Kukonlehto, 1994, 1995, 1996 Dugan Porter, 1994, 1995, 1996 Jakub Jelinek, 1994, 1995, 1996 Mauricio Plaza, 1994, 1995, 1996 Slava Zanko , 2013 This file is part of the Midnight Commander. The Midnight Commander 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 3 of the License, or (at your option) any later version. The Midnight Commander 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, see . */ /** \file lib/util.c * \brief Source: various utilities */ #include #include #include /* ptrdiff_t */ #include #include #include #include #include #include #include #include #include "lib/global.h" #include "lib/mcconfig.h" #include "lib/fileloc.h" #include "lib/vfs/vfs.h" #include "lib/strutil.h" #include "lib/util.h" /*** global variables ****************************************************************************/ /*** file scope macro definitions ****************************************************************/ #define ismode(n,m) ((n & m) == m) /* Number of attempts to create a temporary file */ #ifndef TMP_MAX #define TMP_MAX 16384 #endif /* !TMP_MAX */ #define TMP_SUFFIX ".tmp" #define ASCII_A (0x40 + 1) #define ASCII_Z (0x40 + 26) #define ASCII_a (0x60 + 1) #define ASCII_z (0x60 + 26) /*** file scope type declarations ****************************************************************/ /*** forward declarations (file scope functions) *************************************************/ /*** file scope variables ************************************************************************/ /* --------------------------------------------------------------------------------------------- */ /*** file scope functions ************************************************************************/ /* --------------------------------------------------------------------------------------------- */ #ifndef HAVE_CHARSET static inline int is_7bit_printable (unsigned char c) { return (c > 31 && c < 127); } #endif /* --------------------------------------------------------------------------------------------- */ 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 (mc_global.tty.xterm_flag) return is_iso_printable (c); return (c > 31 && c != 127 && c != 155); } /* --------------------------------------------------------------------------------------------- */ static char * resolve_symlinks (const vfs_path_t *vpath) { char *p, *p2; char *buf, *buf2, *q, *r, c; struct stat mybuf; if (vpath->relative) return NULL; p = p2 = g_strdup (vfs_path_as_str (vpath)); r = buf = g_malloc (MC_MAXPATHLEN); buf2 = g_malloc (MC_MAXPATHLEN); *r++ = PATH_SEP; *r = '\0'; do { q = strchr (p + 1, PATH_SEP); if (q == NULL) { q = strchr (p + 1, '\0'); if (q == p + 1) break; } c = *q; *q = '\0'; if (mc_lstat (vpath, &mybuf) < 0) { MC_PTR_FREE (buf); goto ret; } if (!S_ISLNK (mybuf.st_mode)) strcpy (r, p + 1); else { int len; len = mc_readlink (vpath, buf2, MC_MAXPATHLEN - 1); if (len < 0) { MC_PTR_FREE (buf); goto ret; } buf2[len] = '\0'; if (IS_PATH_SEP (*buf2)) strcpy (buf, buf2); else strcpy (r, buf2); } canonicalize_pathname (buf); r = strchr (buf, '\0'); if (*r == '\0' || !IS_PATH_SEP (r[-1])) /* FIXME: this condition is always true because r points to the EOL */ { *r++ = PATH_SEP; *r = '\0'; } *q = c; p = q; } while (c != '\0'); if (*buf == '\0') strcpy (buf, PATH_SEP_STR); else if (IS_PATH_SEP (r[-1]) && r != buf + 1) r[-1] = '\0'; ret: g_free (buf2); g_free (p2); 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; gboolean ret1 = TRUE; 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; } if (fwrite ((const void *) contents, 1, length, backup_fd) != length) ret1 = FALSE; { int ret2; /* cppcheck-suppress redundantAssignment */ ret2 = fflush (backup_fd); /* cppcheck-suppress redundantAssignment */ ret2 = fclose (backup_fd); (void) ret2; } g_free (contents); return ret1; } /* --------------------------------------------------------------------------------------------- */ /*** public functions ****************************************************************************/ /* --------------------------------------------------------------------------------------------- */ 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 (!mc_global.eight_bit_clean) return is_7bit_printable (c); if (mc_global.full_eight_bits) return is_8bit_printable (c); return is_iso_printable (c); #endif /* !HAVE_CHARSET */ } /* --------------------------------------------------------------------------------------------- */ /** * Quote the filename for the purpose of inserting it into the command * line. If quote_percent is TRUE, replace "%" with "%%" - the percent is * processed by the mc command line. */ char * name_quote (const char *s, gboolean quote_percent) { GString *ret; if (s == NULL || *s == '\0') return NULL; ret = g_string_sized_new (64); if (*s == '-') g_string_append (ret, "." PATH_SEP_STR); for (; *s != '\0'; s++) { switch (*s) { case '%': if (quote_percent) g_string_append_c (ret, '%'); 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 ')': g_string_append_c (ret, '\\'); break; case '~': case '#': if (ret->len == 0) g_string_append_c (ret, '\\'); break; default: break; } g_string_append_c (ret, *s); } return g_string_free (ret, ret->len == 0); } /* --------------------------------------------------------------------------------------------- */ char * fake_name_quote (const char *s, gboolean quote_percent) { (void) quote_percent; return (s == NULL || *s == '\0' ? NULL : g_strdup (s)); } /* --------------------------------------------------------------------------------------------- */ /** * path_trunc() is the same as str_trunc() but * it deletes possible password from path for security * reasons. */ const char * path_trunc (const char *path, size_t trunc_len) { vfs_path_t *vpath; const char *ret; vpath = vfs_path_from_str_flags (path, VPF_STRIP_PASSWORD); ret = str_trunc (vfs_path_as_str (vpath), trunc_len); vfs_path_free (vpath, TRUE); return ret; } /* --------------------------------------------------------------------------------------------- */ const char * size_trunc (uintmax_t size, gboolean use_si) { static char x[BUF_TINY]; uintmax_t divisor = 1; const char *xtra = _("B"); if (size > 999999999UL) { divisor = use_si ? 1000 : 1024; xtra = use_si ? _("kB") : _("KiB"); if (size / divisor > 999999999UL) { divisor = use_si ? (1000 * 1000) : (1024 * 1024); xtra = use_si ? _("MB") : _("MiB"); if (size / divisor > 999999999UL) { divisor = use_si ? (1000 * 1000 * 1000) : (1024 * 1024 * 1024); xtra = use_si ? _("GB") : _("GiB"); } } } g_snprintf (x, sizeof (x), "%.0f %s", 1.0 * size / divisor, xtra); return x; } /* --------------------------------------------------------------------------------------------- */ const char * size_trunc_sep (uintmax_t size, gboolean use_si) { static char x[60]; int count; const char *p, *y; char *d; p = y = size_trunc (size, use_si); p += strlen (p) - 1; d = x + sizeof (x) - 1; *d-- = '\0'; /* @size format is "size unit", i.e. "[digits][space][letters]". Copy all characters after digits. */ while (p >= y && !g_ascii_isdigit (*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, uintmax_t size, int units, gboolean use_si) { /* Avoid taking power for every file. */ /* *INDENT-OFF* */ static const uintmax_t power10[] = { /* we hope that size of uintmax_t is 4 bytes at least */ 1ULL, 10ULL, 100ULL, 1000ULL, 10000ULL, 100000ULL, 1000000ULL, 10000000ULL, 100000000ULL, 1000000000ULL /* maximum value of uintmax_t (in case of 4 bytes) is 4294967295 */ #if SIZEOF_UINTMAX_T == 8 , 10000000000ULL, 100000000000ULL, 1000000000000ULL, 10000000000000ULL, 100000000000000ULL, 1000000000000000ULL, 10000000000000000ULL, 100000000000000000ULL, 1000000000000000000ULL, 10000000000000000000ULL /* maximum value of uintmax_t (in case of 8 bytes) is 18447644073710439615 */ #endif }; static const char *const suffix[] = { "", "K", "M", "G", "T", "P", "E", "Z", "Y", "R", "Q", NULL }; static const char *const suffix_lc[] = { "", "k", "m", "g", "t", "p", "e", "z", "y", "r", "q", NULL }; /* *INDENT-ON* */ const char *const *sfx = use_si ? suffix_lc : suffix; int j = 0; if (len == 0) len = 9; #if SIZEOF_UINTMAX_T == 8 /* 20 decimal digits are required to represent 8 bytes */ else if (len > 19) len = 19; #else /* 10 decimal digits are required to represent 4 bytes */ else if (len > 9) len = 9; #endif /* * recalculate from 1024 base to 1000 base if units>0 * We can't just multiply by 1024 - that might cause overflow * if uintmax_t type is too small */ if (use_si) for (j = 0; j < units; j++) { uintmax_t size_remain; size_remain = ((size % 125) * 1024) / 1000; /* size mod 125, recalculated */ size /= 125; /* 128/125 = 1024/1000 */ 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; sfx[j] != NULL; j++) { if (size == 0) { if (j == units) { /* Empty files will print "0" even with minimal width. */ g_snprintf (buffer, len + 1, "%s", "0"); } else { /* Use "~K" or just "K" if len is 1. Use "B" for bytes. */ g_snprintf (buffer, len + 1, (len > 1) ? "~%s" : "%s", (j > 1) ? sfx[j - 1] : "B"); } break; } if (size < power10[len - (j > 0 ? 1 : 0)]) { g_snprintf (buffer, len + 1, "%" PRIuMAX "%s", size, sfx[j]); break; } /* Powers of 1000 or 1024, with rounding. */ if (use_si) size = (size + 500) / 1000; else size = (size + 512) >> 10; } } /* --------------------------------------------------------------------------------------------- */ 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; } /* --------------------------------------------------------------------------------------------- */ const char * extension (const char *filename) { const char *d; d = strrchr (filename, '.'); return d != NULL ? d + 1 : ""; } /* --------------------------------------------------------------------------------------------- */ char * load_mc_home_file (const char *from, const char *filename, char **allocated_filename, size_t *length) { char *hintfile_base, *hintfile; char *lang; char *data; hintfile_base = g_build_filename (from, filename, (char *) NULL); lang = guess_message_value (); hintfile = g_strconcat (hintfile_base, ".", lang, (char *) NULL); if (!g_file_get_contents (hintfile, &data, length, NULL)) { /* Fall back to the two-letter language code */ if (lang[0] != '\0' && lang[1] != '\0') lang[2] = '\0'; g_free (hintfile); hintfile = g_strconcat (hintfile_base, ".", lang, (char *) NULL); if (!g_file_get_contents (hintfile, &data, length, NULL)) { g_free (hintfile); hintfile = hintfile_base; g_file_get_contents (hintfile_base, &data, length, NULL); } } g_free (lang); if (hintfile != hintfile_base) g_free (hintfile_base); if (allocated_filename != NULL) *allocated_filename = hintfile; else g_free (hintfile); return data; } /* --------------------------------------------------------------------------------------------- */ const char * extract_line (const char *s, const char *top, size_t *len) { static char tmp_line[BUF_MEDIUM]; char *t = tmp_line; while (*s != '\0' && *s != '\n' && (size_t) (t - tmp_line) < sizeof (tmp_line) - 1 && s < top) *t++ = *s++; *t = '\0'; if (len != NULL) *len = (size_t) (t - tmp_line); return tmp_line; } /* --------------------------------------------------------------------------------------------- */ /** * The basename routine */ const char * x_basename (const char *s) { const char *url_delim, *path_sep; url_delim = g_strrstr (s, VFS_PATH_URL_DELIMITER); path_sep = strrchr (s, PATH_SEP); if (path_sep == NULL) return s; if (url_delim == NULL || url_delim < path_sep - strlen (VFS_PATH_URL_DELIMITER) || url_delim - s + strlen (VFS_PATH_URL_DELIMITER) < strlen (s)) { /* avoid trailing PATH_SEP, if present */ if (!IS_PATH_SEP (s[strlen (s) - 1])) return path_sep + 1; while (--path_sep > s && !IS_PATH_SEP (*path_sep)) ; return (path_sep != s) ? path_sep + 1 : s; } while (--url_delim > s && !IS_PATH_SEP (*url_delim)) ; while (--url_delim > s && !IS_PATH_SEP (*url_delim)) ; return url_delim == s ? s : url_delim + 1; } /* --------------------------------------------------------------------------------------------- */ 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 != '\0'; str_cnext_char (&su)) if (!whitespace (*su) && *su != ',') break; return su; } /* --------------------------------------------------------------------------------------------- */ const char * skip_numbers (const char *s) { const char *su = s; for (; *su != '\0'; 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 '[' (parameter-byte)* (intermediate-byte)* final-byte * parameter-byte = [\x30-\x3F] # one of "0-9;:<=>?" * intermediate-byte = [\x20–\x2F] # one of " !\"#$%&'()*+,-./" * final-byte = [\x40-\x7e] # one of "@A–Z[\]^_`a–z{|}~" * * The 256-color and true-color escape sequences should allow either ';' or ':' inside as separator, * actually, ':' is the more correct according to ECMA-48. * Some terminal emulators (e.g. xterm, gnome-terminal) support this. * * 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 */ if (s == NULL) return NULL; for (w = s, r = s; *r != '\0';) { 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) != '\0' && strchr ("0123456789;:<=>?", *r) != NULL) ; while (*r != '\0' && (*r < 0x40 || *r > 0x7E)) ++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; for (new_r = r; *new_r != '\0'; 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; } break; default: break; } } osc_out: ; } /* * Now we are at the last character of the sequence. * Skip it unless it's binary 0. */ if (*r != '\0') r++; } else { char *n; n = str_get_next_char (r); if (str_isprint (r)) { memmove (w, r, n - r); w += n - r; } r = n; } } *w = '\0'; return s; } /* --------------------------------------------------------------------------------------------- */ 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] == 0x1F && (magic[1] == 0x8B || magic[1] == 0x9E)) return COMPRESSION_GZIP; /* PKZIP_MAGIC */ if (magic[0] == 'P' && magic[1] == 'K' && magic[2] == 0x03 && magic[3] == 0x04) { /* Read compression type */ mc_lseek (fd, 8, SEEK_SET); if (mc_read (fd, (char *) magic, 2) != 2) return COMPRESSION_NONE; if ((magic[0] != 8 && magic[0] != 0) || magic[1] != 0) return COMPRESSION_NONE; return COMPRESSION_ZIP; } /* PACK_MAGIC and LZH_MAGIC and compress magic */ if (magic[0] == 0x1F && (magic[1] == 0x1E || magic[1] == 0xA0 || magic[1] == 0x9D)) /* 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; default: break; } /* LZ4 format - v1.5.0 - 0x184D2204 (little endian) */ if (magic[0] == 0x04 && magic[1] == 0x22 && magic[2] == 0x4d && magic[3] == 0x18) return COMPRESSION_LZ4; if (mc_read (fd, (char *) magic + 4, 2) != 2) return COMPRESSION_NONE; /* LZIP files */ if (magic[0] == 'L' && magic[1] == 'Z' && magic[2] == 'I' && magic[3] == 'P' && (magic[4] == 0x00 || magic[4] == 0x01)) return COMPRESSION_LZIP; /* Support for LZMA (only utils format with magic in header). * This is the default format of LZMA utils 4.32.1 and later. */ if (magic[0] == 0xFF && magic[1] == 'L' && magic[2] == 'Z' && magic[3] == 'M' && magic[4] == 'A' && magic[5] == 0x00) return COMPRESSION_LZMA; /* LZO format - \x89\x4c\x5a\x4f\x00\x0d\x0a\x1a\x0a lzop compressed data */ if (magic[0] == 0x89 && magic[1] == 0x4c && magic[2] == 0x5a && magic[3] == 0x4f && magic[4] == 0x00 && magic[5] == 0x0d) return COMPRESSION_LZO; /* 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; if (magic[0] == 0x28 && magic[1] == 0xB5 && magic[2] == 0x2F && magic[3] == 0xFD) return COMPRESSION_ZSTD; str_len = strlen (name); /* HACK: we must believe to extension 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_ZIP: return "/uz" VFS_PATH_URL_DELIMITER; case COMPRESSION_GZIP: return "/ugz" VFS_PATH_URL_DELIMITER; case COMPRESSION_BZIP: return "/ubz" VFS_PATH_URL_DELIMITER; case COMPRESSION_BZIP2: return "/ubz2" VFS_PATH_URL_DELIMITER; case COMPRESSION_LZIP: return "/ulz" VFS_PATH_URL_DELIMITER; case COMPRESSION_LZ4: return "/ulz4" VFS_PATH_URL_DELIMITER; case COMPRESSION_LZMA: return "/ulzma" VFS_PATH_URL_DELIMITER; case COMPRESSION_LZO: return "/ulzo" VFS_PATH_URL_DELIMITER; case COMPRESSION_XZ: return "/uxz" VFS_PATH_URL_DELIMITER; case COMPRESSION_ZSTD: return "/uzst" VFS_PATH_URL_DELIMITER; default: break; } /* Should never reach this place */ fprintf (stderr, "Fatal: decompress_extension called with an unknown argument\n"); return 0; } /* --------------------------------------------------------------------------------------------- */ void wipe_password (char *passwd) { if (passwd != NULL) { char *p; for (p = passwd; *p != '\0'; p++) *p = '\0'; g_free (passwd); } } /* --------------------------------------------------------------------------------------------- */ /** * Convert "\E" -> esc character and ^x to control-x key and ^^ to ^ key * * @param p pointer to string * * @return newly allocated string */ char * convert_controls (const char *p) { char *valcopy; char *q; valcopy = g_strdup (p); /* Parse the escape special character */ for (q = valcopy; *p != '\0';) switch (*p) { case '\\': p++; if (*p == 'e' || *p == 'E') { p++; *q++ = ESC_CHAR; } break; case '^': p++; if (*p == '^') *q++ = *p++; else { char c; c = *p | 0x20; if (c >= 'a' && c <= 'z') { *q++ = c - 'a' + 1; p++; } else if (*p != '\0') p++; } break; default: *q++ = *p++; } *q = '\0'; return valcopy; } /* --------------------------------------------------------------------------------------------- */ /** * 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 vfs_path_t *vpath1, const vfs_path_t *vpath2) { int j, prevlen = -1, currlen; char *my_first = NULL, *my_second = NULL; char *buf = NULL; my_first = resolve_symlinks (vpath1); if (my_first == NULL) goto ret; my_second = resolve_symlinks (vpath2); if (my_second == NULL) goto ret; for (j = 0; j < 2; j++) { char *p, *q; int i; p = my_first; q = my_second; while (TRUE) { char *r, *s; ptrdiff_t len; r = strchr (p, PATH_SEP); if (r == NULL) break; s = strchr (q, PATH_SEP); if (s == NULL) break; len = r - p; if (len != (s - q) || strncmp (p, q, (size_t) len) != 0) break; 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 != 0) { if (currlen < prevlen) g_free (buf); else goto ret; } p = buf = g_malloc (currlen); prevlen = currlen; for (; i >= 0; i--, p += 3) strcpy (p, "../"); strcpy (p, q); } ret: g_free (my_first); g_free (my_second); return buf; } /* --------------------------------------------------------------------------------------------- */ /** * 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); (void) tmp; g_list_free_1 (lc_link); } lc_link = newlink; } return list; } /* --------------------------------------------------------------------------------------------- */ /** * 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 vfs_path_t *filename_vpath, long *line, long *column, off_t *offset, GArray **bookmarks) { char *fn; FILE *f; char buf[MC_MAXPATHLEN + 100]; const size_t len = vfs_path_len (filename_vpath); /* defaults */ *line = 1; *column = 0; *offset = 0; /* open file with positions */ fn = mc_config_get_full_path (MC_FILEPOS_FILE); f = fopen (fn, "r"); g_free (fn); if (f == NULL) return; /* prepare array for serialized bookmarks */ if (bookmarks != NULL) *bookmarks = g_array_sized_new (FALSE, FALSE, sizeof (size_t), MAX_SAVED_BOOKMARKS); while (fgets (buf, sizeof (buf), f) != NULL) { const char *p; gchar **pos_tokens; /* check if the filename matches the beginning of string */ if (strncmp (buf, vfs_path_as_str (filename_vpath), len) != 0) continue; /* followed by single space */ if (buf[len] != ' ') continue; /* and string without spaces */ p = &buf[len + 1]; if (strchr (p, ' ') != NULL) continue; pos_tokens = g_strsplit (p, ";", 3 + MAX_SAVED_BOOKMARKS); if (pos_tokens[0] == NULL) { *line = 1; *column = 0; *offset = 0; } else { *line = strtol (pos_tokens[0], NULL, 10); if (pos_tokens[1] == NULL) { *column = 0; *offset = 0; } else { *column = strtol (pos_tokens[1], NULL, 10); if (pos_tokens[2] == NULL) *offset = 0; else if (bookmarks != NULL) { size_t i; *offset = (off_t) g_ascii_strtoll (pos_tokens[2], NULL, 10); for (i = 0; i < MAX_SAVED_BOOKMARKS && pos_tokens[3 + i] != NULL; i++) { size_t val; val = strtoul (pos_tokens[3 + i], NULL, 10); g_array_append_val (*bookmarks, val); } } } } g_strfreev (pos_tokens); } fclose (f); } /* --------------------------------------------------------------------------------------------- */ /** * Save position for the given file */ void save_file_position (const vfs_path_t *filename_vpath, long line, long column, off_t offset, GArray *bookmarks) { static size_t filepos_max_saved_entries = 0; char *fn, *tmp_fn; FILE *f, *tmp_f; char buf[MC_MAXPATHLEN + 100]; size_t i; const size_t len = vfs_path_len (filename_vpath); gboolean src_error = FALSE; if (filepos_max_saved_entries == 0) filepos_max_saved_entries = mc_config_get_int (mc_global.main_config, CONFIG_APP_SECTION, "filepos_max_saved_entries", 1024); fn = mc_config_get_full_path (MC_FILEPOS_FILE); if (fn == NULL) goto early_error; 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) { src_error = TRUE; goto open_source_error; } /* put the new record */ if (line != 1 || column != 0 || bookmarks != NULL) { if (fprintf (f, "%s %ld;%ld;%" PRIuMAX, vfs_path_as_str (filename_vpath), line, column, (uintmax_t) offset) < 0) goto write_position_error; if (bookmarks != NULL) for (i = 0; i < bookmarks->len && i < MAX_SAVED_BOOKMARKS; i++) if (fprintf (f, ";%zu", g_array_index (bookmarks, size_t, i)) < 0) goto write_position_error; if (fprintf (f, "\n") < 0) goto write_position_error; } i = 1; while (fgets (buf, sizeof (buf), tmp_f) != NULL) { if (buf[len] == ' ' && strncmp (buf, vfs_path_as_str (filename_vpath), len) == 0 && strchr (&buf[len + 1], ' ') == NULL) continue; fprintf (f, "%s", buf); if (++i > filepos_max_saved_entries) break; } write_position_error: fclose (tmp_f); open_source_error: g_free (tmp_fn); fclose (f); if (src_error) mc_util_restore_from_backup_if_possible (fn, TMP_SUFFIX); else mc_util_unlink_backup_if_possible (fn, TMP_SUFFIX); open_target_error: g_free (fn); early_error: if (bookmarks != NULL) g_array_free (bookmarks, TRUE); } /* --------------------------------------------------------------------------------------------- */ 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)) { vfs_path_t *vpath; vpath = vfs_path_from_str (backup_path); mc_unlink (vpath); vfs_path_free (vpath, TRUE); } 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 }; size_t i; const char *locale = NULL; for (i = 0; var[i] != NULL; i++) { locale = getenv (var[i]); if (locale != NULL && locale[0] != '\0') break; } if (locale == NULL) locale = ""; return g_strdup (locale); } /* --------------------------------------------------------------------------------------------- */ /** * The "profile root" is the tree under which all of MC's user data & * settings are stored. * * It defaults to the user's home dir. The user may override this default * with the environment variable $MC_PROFILE_ROOT. */ const char * mc_get_profile_root (void) { static const char *profile_root = NULL; if (profile_root == NULL) { profile_root = g_getenv ("MC_PROFILE_ROOT"); if (profile_root == NULL || *profile_root == '\0') profile_root = mc_config_get_home_dir (); } return profile_root; } /* --------------------------------------------------------------------------------------------- */ /** * Propagate error in simple way. * * @param dest error return location * @param code error code * @param format printf()-style format for error message * @param ... parameters for message format */ void mc_propagate_error (GError **dest, int code, const char *format, ...) { if (dest != NULL && *dest == NULL) { GError *tmp_error; va_list args; va_start (args, format); tmp_error = g_error_new_valist (MC_ERROR, code, format, args); va_end (args); g_propagate_error (dest, tmp_error); } } /* --------------------------------------------------------------------------------------------- */ /** * Replace existing error in simple way. * * @param dest error return location * @param code error code * @param format printf()-style format for error message * @param ... parameters for message format */ void mc_replace_error (GError **dest, int code, const char *format, ...) { if (dest != NULL) { GError *tmp_error; va_list args; va_start (args, format); tmp_error = g_error_new_valist (MC_ERROR, code, format, args); va_end (args); g_error_free (*dest); *dest = NULL; g_propagate_error (dest, tmp_error); } } /* --------------------------------------------------------------------------------------------- */ /** * Returns if the given duration has elapsed since the given timestamp, * and if it has then updates the timestamp. * * @param timestamp the last timestamp in microseconds, updated if the given time elapsed * @param delay amount of time in microseconds * @return TRUE if clock skew detected, FALSE otherwise */ gboolean mc_time_elapsed (gint64 *timestamp, gint64 delay) { gint64 now; now = g_get_monotonic_time (); if (now >= *timestamp && now < *timestamp + delay) return FALSE; *timestamp = now; return TRUE; } /* --------------------------------------------------------------------------------------------- */