mirror of
http://galexander.org/git/simplesshd.git
synced 2024-11-16 03:59:03 +00:00
369 lines
9.4 KiB
C
369 lines
9.4 KiB
C
/*
|
|
** Do shell-style pattern matching for ?, \, [], and * characters.
|
|
** It is 8bit clean.
|
|
**
|
|
** Written by Rich $alz, mirror!rs, Wed Nov 26 19:03:17 EST 1986.
|
|
** Rich $alz is now <rsalz@bbn.com>.
|
|
**
|
|
** Modified by Wayne Davison to special-case '/' matching, to make '**'
|
|
** work differently than '*', and to fix the character-class code.
|
|
*/
|
|
|
|
#include "rsync.h"
|
|
|
|
/* What character marks an inverted character class? */
|
|
#define NEGATE_CLASS '!'
|
|
#define NEGATE_CLASS2 '^'
|
|
|
|
#define FALSE 0
|
|
#define TRUE 1
|
|
#define ABORT_ALL -1
|
|
#define ABORT_TO_STARSTAR -2
|
|
|
|
#define CC_EQ(class, len, litmatch) ((len) == sizeof (litmatch)-1 \
|
|
&& *(class) == *(litmatch) \
|
|
&& strncmp((char*)class, litmatch, len) == 0)
|
|
|
|
#if defined STDC_HEADERS || !defined isascii
|
|
# define ISASCII(c) 1
|
|
#else
|
|
# define ISASCII(c) isascii(c)
|
|
#endif
|
|
|
|
#ifdef isblank
|
|
# define ISBLANK(c) (ISASCII(c) && isblank(c))
|
|
#else
|
|
# define ISBLANK(c) ((c) == ' ' || (c) == '\t')
|
|
#endif
|
|
|
|
#ifdef isgraph
|
|
# define ISGRAPH(c) (ISASCII(c) && isgraph(c))
|
|
#else
|
|
# define ISGRAPH(c) (ISASCII(c) && isprint(c) && !isspace(c))
|
|
#endif
|
|
|
|
#define ISPRINT(c) (ISASCII(c) && isprint(c))
|
|
#define ISDIGIT(c) (ISASCII(c) && isdigit(c))
|
|
#define ISALNUM(c) (ISASCII(c) && isalnum(c))
|
|
#define ISALPHA(c) (ISASCII(c) && isalpha(c))
|
|
#define ISCNTRL(c) (ISASCII(c) && iscntrl(c))
|
|
#define ISLOWER(c) (ISASCII(c) && islower(c))
|
|
#define ISPUNCT(c) (ISASCII(c) && ispunct(c))
|
|
#define ISSPACE(c) (ISASCII(c) && isspace(c))
|
|
#define ISUPPER(c) (ISASCII(c) && isupper(c))
|
|
#define ISXDIGIT(c) (ISASCII(c) && isxdigit(c))
|
|
|
|
#ifdef WILD_TEST_ITERATIONS
|
|
int wildmatch_iteration_count;
|
|
#endif
|
|
|
|
static int force_lower_case = 0;
|
|
|
|
/* Match pattern "p" against the a virtually-joined string consisting
|
|
* of "text" and any strings in array "a". */
|
|
static int dowild(const uchar *p, const uchar *text, const uchar*const *a)
|
|
{
|
|
uchar p_ch;
|
|
|
|
#ifdef WILD_TEST_ITERATIONS
|
|
wildmatch_iteration_count++;
|
|
#endif
|
|
|
|
for ( ; (p_ch = *p) != '\0'; text++, p++) {
|
|
int matched, special;
|
|
uchar t_ch, prev_ch;
|
|
while ((t_ch = *text) == '\0') {
|
|
if (*a == NULL) {
|
|
if (p_ch != '*')
|
|
return ABORT_ALL;
|
|
break;
|
|
}
|
|
text = *a++;
|
|
}
|
|
if (force_lower_case && ISUPPER(t_ch))
|
|
t_ch = tolower(t_ch);
|
|
switch (p_ch) {
|
|
case '\\':
|
|
/* Literal match with following character. Note that the test
|
|
* in "default" handles the p[1] == '\0' failure case. */
|
|
p_ch = *++p;
|
|
/* FALLTHROUGH */
|
|
default:
|
|
if (t_ch != p_ch)
|
|
return FALSE;
|
|
continue;
|
|
case '?':
|
|
/* Match anything but '/'. */
|
|
if (t_ch == '/')
|
|
return FALSE;
|
|
continue;
|
|
case '*':
|
|
if (*++p == '*') {
|
|
while (*++p == '*') {}
|
|
special = TRUE;
|
|
} else
|
|
special = FALSE;
|
|
if (*p == '\0') {
|
|
/* Trailing "**" matches everything. Trailing "*" matches
|
|
* only if there are no more slash characters. */
|
|
if (!special) {
|
|
do {
|
|
if (strchr((char*)text, '/') != NULL)
|
|
return FALSE;
|
|
} while ((text = *a++) != NULL);
|
|
}
|
|
return TRUE;
|
|
}
|
|
while (1) {
|
|
if (t_ch == '\0') {
|
|
if ((text = *a++) == NULL)
|
|
break;
|
|
t_ch = *text;
|
|
continue;
|
|
}
|
|
if ((matched = dowild(p, text, a)) != FALSE) {
|
|
if (!special || matched != ABORT_TO_STARSTAR)
|
|
return matched;
|
|
} else if (!special && t_ch == '/')
|
|
return ABORT_TO_STARSTAR;
|
|
t_ch = *++text;
|
|
}
|
|
return ABORT_ALL;
|
|
case '[':
|
|
p_ch = *++p;
|
|
#ifdef NEGATE_CLASS2
|
|
if (p_ch == NEGATE_CLASS2)
|
|
p_ch = NEGATE_CLASS;
|
|
#endif
|
|
/* Assign literal TRUE/FALSE because of "matched" comparison. */
|
|
special = p_ch == NEGATE_CLASS? TRUE : FALSE;
|
|
if (special) {
|
|
/* Inverted character class. */
|
|
p_ch = *++p;
|
|
}
|
|
prev_ch = 0;
|
|
matched = FALSE;
|
|
do {
|
|
if (!p_ch)
|
|
return ABORT_ALL;
|
|
if (p_ch == '\\') {
|
|
p_ch = *++p;
|
|
if (!p_ch)
|
|
return ABORT_ALL;
|
|
if (t_ch == p_ch)
|
|
matched = TRUE;
|
|
} else if (p_ch == '-' && prev_ch && p[1] && p[1] != ']') {
|
|
p_ch = *++p;
|
|
if (p_ch == '\\') {
|
|
p_ch = *++p;
|
|
if (!p_ch)
|
|
return ABORT_ALL;
|
|
}
|
|
if (t_ch <= p_ch && t_ch >= prev_ch)
|
|
matched = TRUE;
|
|
p_ch = 0; /* This makes "prev_ch" get set to 0. */
|
|
} else if (p_ch == '[' && p[1] == ':') {
|
|
const uchar *s;
|
|
int i;
|
|
for (s = p += 2; (p_ch = *p) && p_ch != ']'; p++) {} /*SHARED ITERATOR*/
|
|
if (!p_ch)
|
|
return ABORT_ALL;
|
|
i = p - s - 1;
|
|
if (i < 0 || p[-1] != ':') {
|
|
/* Didn't find ":]", so treat like a normal set. */
|
|
p = s - 2;
|
|
p_ch = '[';
|
|
if (t_ch == p_ch)
|
|
matched = TRUE;
|
|
continue;
|
|
}
|
|
if (CC_EQ(s,i, "alnum")) {
|
|
if (ISALNUM(t_ch))
|
|
matched = TRUE;
|
|
} else if (CC_EQ(s,i, "alpha")) {
|
|
if (ISALPHA(t_ch))
|
|
matched = TRUE;
|
|
} else if (CC_EQ(s,i, "blank")) {
|
|
if (ISBLANK(t_ch))
|
|
matched = TRUE;
|
|
} else if (CC_EQ(s,i, "cntrl")) {
|
|
if (ISCNTRL(t_ch))
|
|
matched = TRUE;
|
|
} else if (CC_EQ(s,i, "digit")) {
|
|
if (ISDIGIT(t_ch))
|
|
matched = TRUE;
|
|
} else if (CC_EQ(s,i, "graph")) {
|
|
if (ISGRAPH(t_ch))
|
|
matched = TRUE;
|
|
} else if (CC_EQ(s,i, "lower")) {
|
|
if (ISLOWER(t_ch))
|
|
matched = TRUE;
|
|
} else if (CC_EQ(s,i, "print")) {
|
|
if (ISPRINT(t_ch))
|
|
matched = TRUE;
|
|
} else if (CC_EQ(s,i, "punct")) {
|
|
if (ISPUNCT(t_ch))
|
|
matched = TRUE;
|
|
} else if (CC_EQ(s,i, "space")) {
|
|
if (ISSPACE(t_ch))
|
|
matched = TRUE;
|
|
} else if (CC_EQ(s,i, "upper")) {
|
|
if (ISUPPER(t_ch))
|
|
matched = TRUE;
|
|
} else if (CC_EQ(s,i, "xdigit")) {
|
|
if (ISXDIGIT(t_ch))
|
|
matched = TRUE;
|
|
} else /* malformed [:class:] string */
|
|
return ABORT_ALL;
|
|
p_ch = 0; /* This makes "prev_ch" get set to 0. */
|
|
} else if (t_ch == p_ch)
|
|
matched = TRUE;
|
|
} while (prev_ch = p_ch, (p_ch = *++p) != ']');
|
|
if (matched == special || t_ch == '/')
|
|
return FALSE;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
do {
|
|
if (*text)
|
|
return FALSE;
|
|
} while ((text = *a++) != NULL);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Match literal string "s" against the a virtually-joined string consisting
|
|
* of "text" and any strings in array "a". */
|
|
static int doliteral(const uchar *s, const uchar *text, const uchar*const *a)
|
|
{
|
|
for ( ; *s != '\0'; text++, s++) {
|
|
while (*text == '\0') {
|
|
if ((text = *a++) == NULL)
|
|
return FALSE;
|
|
}
|
|
if (*text != *s)
|
|
return FALSE;
|
|
}
|
|
|
|
do {
|
|
if (*text)
|
|
return FALSE;
|
|
} while ((text = *a++) != NULL);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Return the last "count" path elements from the concatenated string.
|
|
* We return a string pointer to the start of the string, and update the
|
|
* array pointer-pointer to point to any remaining string elements. */
|
|
static const uchar *trailing_N_elements(const uchar*const **a_ptr, int count)
|
|
{
|
|
const uchar*const *a = *a_ptr;
|
|
const uchar*const *first_a = a;
|
|
|
|
while (*a)
|
|
a++;
|
|
|
|
while (a != first_a) {
|
|
const uchar *s = *--a;
|
|
s += strlen((char*)s);
|
|
while (--s >= *a) {
|
|
if (*s == '/' && !--count) {
|
|
*a_ptr = a+1;
|
|
return s+1;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (count == 1) {
|
|
*a_ptr = a+1;
|
|
return *a;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Match the "pattern" against the "text" string. */
|
|
int wildmatch(const char *pattern, const char *text)
|
|
{
|
|
static const uchar *nomore[1]; /* A NULL pointer. */
|
|
#ifdef WILD_TEST_ITERATIONS
|
|
wildmatch_iteration_count = 0;
|
|
#endif
|
|
return dowild((const uchar*)pattern, (const uchar*)text, nomore) == TRUE;
|
|
}
|
|
|
|
/* Match the "pattern" against the forced-to-lower-case "text" string. */
|
|
int iwildmatch(const char *pattern, const char *text)
|
|
{
|
|
static const uchar *nomore[1]; /* A NULL pointer. */
|
|
int ret;
|
|
#ifdef WILD_TEST_ITERATIONS
|
|
wildmatch_iteration_count = 0;
|
|
#endif
|
|
force_lower_case = 1;
|
|
ret = dowild((const uchar*)pattern, (const uchar*)text, nomore) == TRUE;
|
|
force_lower_case = 0;
|
|
return ret;
|
|
}
|
|
|
|
/* Match pattern "p" against the a virtually-joined string consisting
|
|
* of all the pointers in array "texts" (which has a NULL pointer at the
|
|
* end). The int "where" can be 0 (normal matching), > 0 (match only
|
|
* the trailing N slash-separated filename components of "texts"), or < 0
|
|
* (match the "pattern" at the start or after any slash in "texts"). */
|
|
int wildmatch_array(const char *pattern, const char*const *texts, int where)
|
|
{
|
|
const uchar *p = (const uchar*)pattern;
|
|
const uchar*const *a = (const uchar*const*)texts;
|
|
const uchar *text;
|
|
int matched;
|
|
|
|
#ifdef WILD_TEST_ITERATIONS
|
|
wildmatch_iteration_count = 0;
|
|
#endif
|
|
|
|
if (where > 0)
|
|
text = trailing_N_elements(&a, where);
|
|
else
|
|
text = *a++;
|
|
if (!text)
|
|
return FALSE;
|
|
|
|
if ((matched = dowild(p, text, a)) != TRUE && where < 0
|
|
&& matched != ABORT_ALL) {
|
|
while (1) {
|
|
if (*text == '\0') {
|
|
if ((text = (uchar*)*a++) == NULL)
|
|
return FALSE;
|
|
continue;
|
|
}
|
|
if (*text++ == '/' && (matched = dowild(p, text, a)) != FALSE
|
|
&& matched != ABORT_TO_STARSTAR)
|
|
break;
|
|
}
|
|
}
|
|
return matched == TRUE;
|
|
}
|
|
|
|
/* Match literal string "s" against the a virtually-joined string consisting
|
|
* of all the pointers in array "texts" (which has a NULL pointer at the
|
|
* end). The int "where" can be 0 (normal matching), or > 0 (match
|
|
* only the trailing N slash-separated filename components of "texts"). */
|
|
int litmatch_array(const char *string, const char*const *texts, int where)
|
|
{
|
|
const uchar *s = (const uchar*)string;
|
|
const uchar*const *a = (const uchar* const*)texts;
|
|
const uchar *text;
|
|
|
|
if (where > 0)
|
|
text = trailing_N_elements(&a, where);
|
|
else
|
|
text = *a++;
|
|
if (!text)
|
|
return FALSE;
|
|
|
|
return doliteral(s, text, a) == TRUE;
|
|
}
|