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authorAn-Cheng Huang <ancheng@vyatta.com>2007-11-12 13:06:02 -0800
committerAn-Cheng Huang <ancheng@vyatta.com>2007-11-12 13:06:02 -0800
commitb7fc9e0f6d6105ba2203f219743d4b269415e84b (patch)
treeef6586dfc62798c2b17487b443864699aca55f31 /pathexp.c
downloadvyatta-bash-b7fc9e0f6d6105ba2203f219743d4b269415e84b.tar.gz
vyatta-bash-b7fc9e0f6d6105ba2203f219743d4b269415e84b.zip
initial import from bash_3.1dfsg.orig.tar.gz
Diffstat (limited to 'pathexp.c')
-rw-r--r--pathexp.c438
1 files changed, 438 insertions, 0 deletions
diff --git a/pathexp.c b/pathexp.c
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+++ b/pathexp.c
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+/* pathexp.c -- The shell interface to the globbing library. */
+
+/* Copyright (C) 1995-2002 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash, the Bourne Again SHell.
+
+ Bash 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, or (at your option) any later
+ version.
+
+ Bash 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 Bash; see the file COPYING. If not, write to the Free Software
+ Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
+
+#include "config.h"
+
+#include "bashtypes.h"
+#include <stdio.h>
+
+#if defined (HAVE_UNISTD_H)
+# include <unistd.h>
+#endif
+
+#include "bashansi.h"
+
+#include "shell.h"
+#include "pathexp.h"
+#include "flags.h"
+
+#include "shmbutil.h"
+
+#include <glob/strmatch.h>
+
+static int glob_name_is_acceptable __P((const char *));
+static void ignore_globbed_names __P((char **, sh_ignore_func_t *));
+
+#if defined (USE_POSIX_GLOB_LIBRARY)
+# include <glob.h>
+typedef int posix_glob_errfunc_t __P((const char *, int));
+#else
+# include <glob/glob.h>
+#endif
+
+/* Control whether * matches .files in globbing. */
+int glob_dot_filenames;
+
+/* Control whether the extended globbing features are enabled. */
+int extended_glob = 0;
+
+/* Return nonzero if STRING has any unquoted special globbing chars in it. */
+int
+unquoted_glob_pattern_p (string)
+ register char *string;
+{
+ register int c;
+ char *send;
+ int open;
+
+ DECLARE_MBSTATE;
+
+ open = 0;
+ send = string + strlen (string);
+
+ while (c = *string++)
+ {
+ switch (c)
+ {
+ case '?':
+ case '*':
+ return (1);
+
+ case '[':
+ open++;
+ continue;
+
+ case ']':
+ if (open)
+ return (1);
+ continue;
+
+ case '+':
+ case '@':
+ case '!':
+ if (*string == '(') /*)*/
+ return (1);
+ continue;
+
+ case CTLESC:
+ case '\\':
+ if (*string++ == '\0')
+ return (0);
+ }
+
+ /* Advance one fewer byte than an entire multibyte character to
+ account for the auto-increment in the loop above. */
+#ifdef HANDLE_MULTIBYTE
+ string--;
+ ADVANCE_CHAR_P (string, send - string);
+ string++;
+#else
+ ADVANCE_CHAR_P (string, send - string);
+#endif
+ }
+ return (0);
+}
+
+/* PATHNAME can contain characters prefixed by CTLESC; this indicates
+ that the character is to be quoted. We quote it here in the style
+ that the glob library recognizes. If flags includes QGLOB_CVTNULL,
+ we change quoted null strings (pathname[0] == CTLNUL) into empty
+ strings (pathname[0] == 0). If this is called after quote removal
+ is performed, (flags & QGLOB_CVTNULL) should be 0; if called when quote
+ removal has not been done (for example, before attempting to match a
+ pattern while executing a case statement), flags should include
+ QGLOB_CVTNULL. If flags includes QGLOB_FILENAME, appropriate quoting
+ to match a filename should be performed. */
+char *
+quote_string_for_globbing (pathname, qflags)
+ const char *pathname;
+ int qflags;
+{
+ char *temp;
+ register int i, j;
+
+ temp = (char *)xmalloc (strlen (pathname) + 1);
+
+ if ((qflags & QGLOB_CVTNULL) && QUOTED_NULL (pathname))
+ {
+ temp[0] = '\0';
+ return temp;
+ }
+
+ for (i = j = 0; pathname[i]; i++)
+ {
+ if (pathname[i] == CTLESC)
+ {
+ if ((qflags & QGLOB_FILENAME) && pathname[i+1] == '/')
+ continue;
+ temp[j++] = '\\';
+ i++;
+ if (pathname[i] == '\0')
+ break;
+ }
+ temp[j++] = pathname[i];
+ }
+ temp[j] = '\0';
+
+ return (temp);
+}
+
+char *
+quote_globbing_chars (string)
+ char *string;
+{
+ size_t slen;
+ char *temp, *s, *t, *send;
+ DECLARE_MBSTATE;
+
+ slen = strlen (string);
+ send = string + slen;
+
+ temp = (char *)xmalloc (slen * 2 + 1);
+ for (t = temp, s = string; *s; )
+ {
+ switch (*s)
+ {
+ case '*':
+ case '[':
+ case ']':
+ case '?':
+ case '\\':
+ *t++ = '\\';
+ break;
+ case '+':
+ case '@':
+ case '!':
+ if (s[1] == '(') /*(*/
+ *t++ = '\\';
+ break;
+ }
+
+ /* Copy a single (possibly multibyte) character from s to t,
+ incrementing both. */
+ COPY_CHAR_P (t, s, send);
+ }
+ *t = '\0';
+ return temp;
+}
+
+/* Call the glob library to do globbing on PATHNAME. */
+char **
+shell_glob_filename (pathname)
+ const char *pathname;
+{
+#if defined (USE_POSIX_GLOB_LIBRARY)
+ register int i;
+ char *temp, **results;
+ glob_t filenames;
+ int glob_flags;
+
+ temp = quote_string_for_globbing (pathname, QGLOB_FILENAME);
+
+ filenames.gl_offs = 0;
+
+# if defined (GLOB_PERIOD)
+ glob_flags = glob_dot_filenames ? GLOB_PERIOD : 0;
+# else
+ glob_flags = 0;
+# endif /* !GLOB_PERIOD */
+
+ glob_flags |= (GLOB_ERR | GLOB_DOOFFS);
+
+ i = glob (temp, glob_flags, (posix_glob_errfunc_t *)NULL, &filenames);
+
+ free (temp);
+
+ if (i == GLOB_NOSPACE || i == GLOB_ABORTED)
+ return ((char **)NULL);
+ else if (i == GLOB_NOMATCH)
+ filenames.gl_pathv = (char **)NULL;
+ else if (i != 0) /* other error codes not in POSIX.2 */
+ filenames.gl_pathv = (char **)NULL;
+
+ results = filenames.gl_pathv;
+
+ if (results && ((GLOB_FAILED (results)) == 0))
+ {
+ if (should_ignore_glob_matches ())
+ ignore_glob_matches (results);
+ if (results && results[0])
+ strvec_sort (results);
+ else
+ {
+ FREE (results);
+ results = (char **)NULL;
+ }
+ }
+
+ return (results);
+
+#else /* !USE_POSIX_GLOB_LIBRARY */
+
+ char *temp, **results;
+
+ noglob_dot_filenames = glob_dot_filenames == 0;
+
+ temp = quote_string_for_globbing (pathname, QGLOB_FILENAME);
+ results = glob_filename (temp, 0);
+ free (temp);
+
+ if (results && ((GLOB_FAILED (results)) == 0))
+ {
+ if (should_ignore_glob_matches ())
+ ignore_glob_matches (results);
+ if (results && results[0])
+ strvec_sort (results);
+ else
+ {
+ FREE (results);
+ results = (char **)&glob_error_return;
+ }
+ }
+
+ return (results);
+#endif /* !USE_POSIX_GLOB_LIBRARY */
+}
+
+/* Stuff for GLOBIGNORE. */
+
+static struct ignorevar globignore =
+{
+ "GLOBIGNORE",
+ (struct ign *)0,
+ 0,
+ (char *)0,
+ (sh_iv_item_func_t *)0,
+};
+
+/* Set up to ignore some glob matches because the value of GLOBIGNORE
+ has changed. If GLOBIGNORE is being unset, we also need to disable
+ the globbing of filenames beginning with a `.'. */
+void
+setup_glob_ignore (name)
+ char *name;
+{
+ char *v;
+
+ v = get_string_value (name);
+ setup_ignore_patterns (&globignore);
+
+ if (globignore.num_ignores)
+ glob_dot_filenames = 1;
+ else if (v == 0)
+ glob_dot_filenames = 0;
+}
+
+int
+should_ignore_glob_matches ()
+{
+ return globignore.num_ignores;
+}
+
+/* Return 0 if NAME matches a pattern in the globignore.ignores list. */
+static int
+glob_name_is_acceptable (name)
+ const char *name;
+{
+ struct ign *p;
+ int flags;
+
+ /* . and .. are never matched */
+ if (name[0] == '.' && (name[1] == '\0' || (name[1] == '.' && name[2] == '\0')))
+ return (0);
+
+ flags = FNM_PATHNAME | FNMATCH_EXTFLAG;
+ for (p = globignore.ignores; p->val; p++)
+ {
+ if (strmatch (p->val, (char *)name, flags) != FNM_NOMATCH)
+ return (0);
+ }
+ return (1);
+}
+
+/* Internal function to test whether filenames in NAMES should be
+ ignored. NAME_FUNC is a pointer to a function to call with each
+ name. It returns non-zero if the name is acceptable to the particular
+ ignore function which called _ignore_names; zero if the name should
+ be removed from NAMES. */
+
+static void
+ignore_globbed_names (names, name_func)
+ char **names;
+ sh_ignore_func_t *name_func;
+{
+ char **newnames;
+ int n, i;
+
+ for (i = 0; names[i]; i++)
+ ;
+ newnames = strvec_create (i + 1);
+
+ for (n = i = 0; names[i]; i++)
+ {
+ if ((*name_func) (names[i]))
+ newnames[n++] = names[i];
+ else
+ free (names[i]);
+ }
+
+ newnames[n] = (char *)NULL;
+
+ if (n == 0)
+ {
+ names[0] = (char *)NULL;
+ free (newnames);
+ return;
+ }
+
+ /* Copy the acceptable names from NEWNAMES back to NAMES and set the
+ new array end. */
+ for (n = 0; newnames[n]; n++)
+ names[n] = newnames[n];
+ names[n] = (char *)NULL;
+ free (newnames);
+}
+
+void
+ignore_glob_matches (names)
+ char **names;
+{
+ if (globignore.num_ignores == 0)
+ return;
+
+ ignore_globbed_names (names, glob_name_is_acceptable);
+}
+
+void
+setup_ignore_patterns (ivp)
+ struct ignorevar *ivp;
+{
+ int numitems, maxitems, ptr;
+ char *colon_bit, *this_ignoreval;
+ struct ign *p;
+
+ this_ignoreval = get_string_value (ivp->varname);
+
+ /* If nothing has changed then just exit now. */
+ if ((this_ignoreval && ivp->last_ignoreval && STREQ (this_ignoreval, ivp->last_ignoreval)) ||
+ (!this_ignoreval && !ivp->last_ignoreval))
+ return;
+
+ /* Oops. The ignore variable has changed. Re-parse it. */
+ ivp->num_ignores = 0;
+
+ if (ivp->ignores)
+ {
+ for (p = ivp->ignores; p->val; p++)
+ free(p->val);
+ free (ivp->ignores);
+ ivp->ignores = (struct ign *)NULL;
+ }
+
+ if (ivp->last_ignoreval)
+ {
+ free (ivp->last_ignoreval);
+ ivp->last_ignoreval = (char *)NULL;
+ }
+
+ if (this_ignoreval == 0 || *this_ignoreval == '\0')
+ return;
+
+ ivp->last_ignoreval = savestring (this_ignoreval);
+
+ numitems = maxitems = ptr = 0;
+
+ while (colon_bit = extract_colon_unit (this_ignoreval, &ptr))
+ {
+ if (numitems + 1 >= maxitems)
+ {
+ maxitems += 10;
+ ivp->ignores = (struct ign *)xrealloc (ivp->ignores, maxitems * sizeof (struct ign));
+ }
+ ivp->ignores[numitems].val = colon_bit;
+ ivp->ignores[numitems].len = strlen (colon_bit);
+ ivp->ignores[numitems].flags = 0;
+ if (ivp->item_func)
+ (*ivp->item_func) (&ivp->ignores[numitems]);
+ numitems++;
+ }
+ ivp->ignores[numitems].val = (char *)NULL;
+ ivp->num_ignores = numitems;
+}