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author | Mystery Man <unknown@mandriva.org> | 2005-08-30 18:55:27 +0000 |
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committer | Mystery Man <unknown@mandriva.org> | 2005-08-30 18:55:27 +0000 |
commit | ea3a905b182f34bba2f071111d5263f1868c4a6f (patch) | |
tree | 45713836a82198448c93696b30f3c9ab7ba9aa4a /mdk-stage1/insmod-modutils/util/meta_expand.c | |
parent | f5427227e11f6025648f9537ffd3110c003f7e25 (diff) | |
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This commit was manufactured by cvs2svn to create tagV10_3_0_50mdk
'V10_3_0_50mdk'.
Diffstat (limited to 'mdk-stage1/insmod-modutils/util/meta_expand.c')
-rw-r--r-- | mdk-stage1/insmod-modutils/util/meta_expand.c | 339 |
1 files changed, 0 insertions, 339 deletions
diff --git a/mdk-stage1/insmod-modutils/util/meta_expand.c b/mdk-stage1/insmod-modutils/util/meta_expand.c deleted file mode 100644 index 41fb4024c..000000000 --- a/mdk-stage1/insmod-modutils/util/meta_expand.c +++ /dev/null @@ -1,339 +0,0 @@ -/* - * Handle expansion of meta charaters - * - * Copyright 1999 Björn Ekwall <bj0rn@blox.se> - * - * "kernelversion" idea from the Debian release via: - * Wichert Akkerman <wakkerma@cs.leidenuniv.nl> - * - * Use wordexp(): idea from Tim Waugh <tim@cyberelk.demon.co.uk> - * - * Alpha typecast: Michal Jaegermann <michal@ellpspace.math.ualberta.ca> - * - * This file is part of the Linux modutils. - * - * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -#ifdef HAVE_WORDEXP -#undef HAVE_WORDEXP -#define HAVE_WORDEXP 0 -#endif - -#include <stdio.h> -#include <stdlib.h> -#include <limits.h> -#include <string.h> -#include <ctype.h> -#if HAVE_WORDEXP -#include <wordexp.h> -#elif HAVE_GLOB -#include <glob.h> -#endif -#include "util.h" - -/* - * Split into words delimited by whitespace, - * handle remaining quotes though... - * If strip_quotes != 0 then strip one level of quotes from the line. - */ -static void split_line(GLOB_LIST *g, char *line, int strip_quotes) -{ - int len; - char *d; - char *e; - char *p; - char tmpline[PATH_MAX]; - - for (p = line; *p; p = e) { - /* Skip leading whitespace */ - while (*p && isspace(*p)) - ++p; - - /* find end of word */ - d = tmpline; - for (e = p; *e && !(isspace(*e)); ++e) { - char match; - - /* Quote handling */ - switch (*e) { - case '\\': - if (!strip_quotes) - *d++ = *e; - break; - - case '"': - case '\'': - match = *e; - if (!strip_quotes) - *d++ = *e; - for (++e; *e && *e != match; ++e) { - *d++ = *e; - if (*e == '\\' && *(e + 1) == match) - *d++ = *++e; - } - if (!strip_quotes) - *d++ = *e; - break; - - default: - *d++ = *e; - break; - } - } - - if ((len = (int)(d - tmpline)) > 0) { - char *str = xmalloc(len + 1); - strncpy(str, tmpline, len); - str[len] = '\0'; - g->pathv = (char **)xrealloc(g->pathv, - (g->pathc + 2) * sizeof(char *)); - g->pathv[g->pathc++] = str; - } - } - - if (g->pathc) - g->pathv[g->pathc] = NULL; -} - -static int glob_it(char *pt, GLOB_LIST *g) -{ -#if HAVE_WORDEXP - wordexp_t w; - - memset(&w, 0, sizeof(w)); - if (wordexp(pt, &w, WRDE_UNDEF)) { - /* - error("wordexp %s failed", pt); - */ - return -1; - } - /* else */ - g->pathc = w.we_wordc; - g->pathv = w.we_wordv; - - return 0; -#elif HAVE_GLOB /* but not wordexp */ - glob_t w; - - memset(&w, 0, sizeof(w)); - if (glob(pt, GLOB_NOSORT, NULL, &w)) { - /* - error("glob %s failed", pt); - */ - return -1; - } - /* else */ - if (w.gl_pathc && strpbrk(w.gl_pathv[0], SHELL_META)) { - globfree(&w); - return -1; - } - g->pathc = w.gl_pathc; - g->pathv = w.gl_pathv; - - return 0; -#else /* Neither wordexp nor glob */ - return -1; -#endif -} - -/* - * Expand the string (including meta-character) to a list of matches - * - * Return 0 if OK else -1 - */ -int meta_expand(char *pt, GLOB_LIST *g, char *base_dir, char *version, int type) -{ - FILE *fin; - int len = 0; - char *line = NULL; - char *p, *p1; - char tmpline[PATH_MAX + 1]; - char wrk[sizeof(tmpline)]; - char tmpcmd[2*sizeof(tmpline)+20]; /* room for /bin/echo "text" */ - - g->pathc = 0; - g->pathv = NULL; - - /* - * Take care of version dependent expansions - * Needed for forced version handling - */ - if ((p = strchr(pt, '`')) != NULL && (type & ME_BUILTIN_COMMAND)) { - do { - char *s; - - for (s = p + 1; isspace(*s); ++s) - ; - - if (strncmp(s, "uname -r", 8) == 0) { - while (*s && (*s != '`')) - ++s; - if (*s == '`') { - *p = '\0'; - snprintf(wrk, sizeof(wrk), "%s%s%s", - pt, - version, - s + 1); - *p = '`'; - } - strcpy(tmpline, wrk); /* safe, same size */ - pt = tmpline; - } else if (strncmp(s, "kernelversion", 13) == 0) { - while (*s && (*s != '`')) - ++s; - if (*s == '`') { - int n; - char *k; - - *p = '\0'; - for (n = 0, k = version; *k; ++k) { - if (*k == '.' && ++n == 2) - break; - } - snprintf(wrk, sizeof(wrk), "%s%.*s%s", - pt, - /* typecast for Alpha */ - (int)(k - version), - version, - s + 1); - *p = '`'; - strcpy(tmpline, wrk); /* safe, same size */ - pt = tmpline; - } - } else - break; - } while ((p = strchr(pt, '`')) != NULL); - } - - /* - * Any remaining meta-chars? - */ - if (strpbrk(pt, SHELL_META) == NULL) { - /* - * No meta-chars. - * Split into words, delimited by whitespace. - */ - snprintf(wrk, sizeof(wrk), "%s%s", (base_dir ? base_dir : ""), pt); - strcpy(tmpline, wrk); /* safe, same size */ - if ((p = strtok(tmpline, " \t\n")) != NULL) { - while (p) { - g->pathv = (char **)xrealloc(g->pathv, - (g->pathc + 2) * sizeof(char *)); - g->pathv[g->pathc++] = xstrdup(p); - p = strtok(NULL, " \t\n"); - } - } - if (g->pathc) - g->pathv[g->pathc] = NULL; - return 0; - } - /* else */ - /* - * Handle remaining meta-chars - */ - - /* - * Just plain quotes? - */ - if (strpbrk(pt, "&();|<>$`!{}[]~=+:?*") == NULL && - (p = strpbrk(pt, "\"'\\"))) { - split_line(g, pt, 1); - return 0; - } - - if (strpbrk(pt, "&();|<>$`\"'\\!{}~+:[]~?*") == NULL) { - /* Only "=" remaining, should be module options */ - split_line(g, pt, 0); - return 0; - } - - /* - * If there are meta-characters and - * if they are only shell glob meta-characters: do globbing - */ -#if HAVE_WORDEXP - if (strpbrk(pt, "&();|<>`\"'\\!{}~=+:") == NULL && - strpbrk(pt, "$[]~?*")) -#else - if (strpbrk(pt, "&();|<>$`\"'\\!{}~=+:") == NULL && - strpbrk(pt, "[]~?*")) -#endif - if ((type & ME_GLOB) && glob_it(pt, g) == 0) - return 0; - - if (strpbrk(pt, "&();|<>$`\"'\\!{}~+:[]~?*") == NULL) { - /* Only "=" remaining, should be module options */ - split_line(g, pt, 0); - return 0; - } - - /* - * Last resort: Use "echo". - * DANGER: Applying shell expansion to user supplied input is a - * major security risk. Modutils code should only do meta - * expansion via shell commands for trusted data. Basically - * this means only for data in the config file. Even that - * assumes that the user cannot run modprobe as root with - * their own config file. Programs (including the kernel) - * that invoke modprobe as root with user supplied input must - * pass exactly one user supplied parameter and must set - * safe mode. - */ - if (!(type & ME_SHELL_COMMAND)) - return 0; - snprintf(wrk, sizeof(wrk), "%s%s", (base_dir ? base_dir : ""), pt); - strcpy(tmpline, wrk); /* safe, same size */ - snprintf(tmpcmd, sizeof(tmpcmd), "/bin/echo \""); - for (p = tmpline, p1 = tmpcmd + strlen(tmpcmd); *p; ++p, ++p1) { - if (*p == '"' || *p == '\\') - *p1++ = '\\'; - *p1 = *p; - } - *p1++ = '"'; - *p1++ = '\0'; - if (p1 - tmpcmd > sizeof(tmpcmd)) { - error("tmpcmd overflow, should never happen"); - exit(1); - } - if ((fin = popen(tmpcmd, "r")) == NULL) { - error("Can't execute: %s", tmpcmd); - return -1; - } - /* else */ - - /* - * Collect the result - */ - while (fgets(tmpcmd, PATH_MAX, fin) != NULL) { - int l = strlen(tmpcmd); - - line = (char *)xrealloc(line, len + l + 1); - line[len] = '\0'; - strcat(line + len, tmpcmd); /* safe, realloc */ - len += l; - } - pclose(fin); - - if (line) { - /* shell used to strip one set of quotes. Paranoia code in - * 2.3.20 stops that strip so we do it ourselves. - */ - split_line(g, line, 1); - free(line); - } - - return 0; -} |