/* Copyright (C) 1991-2021 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 3 of the License, 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. If not, see . */ extern int interrupt_state, terminating_signal; struct STRUCT { CHAR *pattern; CHAR *string; }; int FCT PARAMS((CHAR *, CHAR *, int)); static int GMATCH PARAMS((CHAR *, CHAR *, CHAR *, CHAR *, struct STRUCT *, int)); static CHAR *PARSE_COLLSYM PARAMS((CHAR *, INT *)); static CHAR *BRACKMATCH PARAMS((CHAR *, U_CHAR, int)); static int EXTMATCH PARAMS((INT, CHAR *, CHAR *, CHAR *, CHAR *, int)); extern void DEQUOTE_PATHNAME PARAMS((CHAR *)); /*static*/ CHAR *PATSCAN PARAMS((CHAR *, CHAR *, INT)); int FCT (pattern, string, flags) CHAR *pattern; CHAR *string; int flags; { CHAR *se, *pe; if (string == 0 || pattern == 0) return FNM_NOMATCH; se = string + STRLEN ((XCHAR *)string); pe = pattern + STRLEN ((XCHAR *)pattern); return (GMATCH (string, se, pattern, pe, (struct STRUCT *)NULL, flags)); } /* Match STRING against the filename pattern PATTERN, returning zero if it matches, FNM_NOMATCH if not. */ static int GMATCH (string, se, pattern, pe, ends, flags) CHAR *string, *se; CHAR *pattern, *pe; struct STRUCT *ends; int flags; { CHAR *p, *n; /* pattern, string */ INT c; /* current pattern character - XXX U_CHAR? */ INT sc; /* current string character - XXX U_CHAR? */ p = pattern; n = string; if (string == 0 || pattern == 0) return FNM_NOMATCH; #if DEBUG_MATCHING fprintf(stderr, "gmatch: string = %s; se = %s\n", string, se); fprintf(stderr, "gmatch: pattern = %s; pe = %s\n", pattern, pe); #endif while (p < pe) { c = *p++; c = FOLD (c); sc = n < se ? *n : '\0'; if (interrupt_state || terminating_signal) return FNM_NOMATCH; #ifdef EXTENDED_GLOB /* EXTMATCH () will handle recursively calling GMATCH, so we can just return what EXTMATCH() returns. */ if ((flags & FNM_EXTMATCH) && *p == L('(') && (c == L('+') || c == L('*') || c == L('?') || c == L('@') || c == L('!'))) /* ) */ { int lflags; /* If we're not matching the start of the string, we're not concerned about the special cases for matching `.' */ lflags = (n == string) ? flags : (flags & ~(FNM_PERIOD|FNM_DOTDOT)); return (EXTMATCH (c, n, se, p, pe, lflags)); } #endif /* EXTENDED_GLOB */ switch (c) { case L('?'): /* Match single character */ if (sc == '\0') return FNM_NOMATCH; else if ((flags & FNM_PATHNAME) && sc == L('/')) /* If we are matching a pathname, `?' can never match a `/'. */ return FNM_NOMATCH; else if ((flags & FNM_PERIOD) && sc == L('.') && (n == string || ((flags & FNM_PATHNAME) && n[-1] == L('/')))) /* `?' cannot match a `.' if it is the first character of the string or if it is the first character following a slash and we are matching a pathname. */ return FNM_NOMATCH; /* `?' cannot match `.' or `..' if it is the first character of the string or if it is the first character following a slash and we are matching a pathname. */ if ((flags & FNM_DOTDOT) && ((n == string && SDOT_OR_DOTDOT(n)) || ((flags & FNM_PATHNAME) && n[-1] == L('/') && PDOT_OR_DOTDOT(n)))) return FNM_NOMATCH; break; case L('\\'): /* backslash escape removes special meaning */ if (p == pe && sc == '\\' && (n+1 == se)) break; if (p == pe) return FNM_NOMATCH; if ((flags & FNM_NOESCAPE) == 0) { c = *p++; /* A trailing `\' cannot match. */ if (p > pe) return FNM_NOMATCH; c = FOLD (c); } if (FOLD (sc) != (U_CHAR)c) return FNM_NOMATCH; break; case L('*'): /* Match zero or more characters */ /* See below for the reason for using this. It avoids backtracking back to a previous `*'. Picked up from glibc. */ if (ends != NULL) { ends->pattern = p - 1; ends->string = n; return (0); } if ((flags & FNM_PERIOD) && sc == L('.') && (n == string || ((flags & FNM_PATHNAME) && n[-1] == L('/')))) /* `*' cannot match a `.' if it is the first character of the string or if it is the first character following a slash and we are matching a pathname. */ return FNM_NOMATCH; /* `*' cannot match `.' or `..' if it is the first character of the string or if it is the first character following a slash and we are matching a pathname. */ if ((flags & FNM_DOTDOT) && ((n == string && SDOT_OR_DOTDOT(n)) || ((flags & FNM_PATHNAME) && n[-1] == L('/') && PDOT_OR_DOTDOT(n)))) return FNM_NOMATCH; if (p == pe) return 0; /* Collapse multiple consecutive `*' and `?', but make sure that one character of the string is consumed for each `?'. */ for (c = *p++; (c == L('?') || c == L('*')); c = *p++) { if ((flags & FNM_PATHNAME) && sc == L('/')) /* A slash does not match a wildcard under FNM_PATHNAME. */ return FNM_NOMATCH; #ifdef EXTENDED_GLOB else if ((flags & FNM_EXTMATCH) && c == L('?') && *p == L('(')) /* ) */ { CHAR *newn; /* We can match 0 or 1 times. If we match, return success */ if (EXTMATCH (c, n, se, p, pe, flags) == 0) return (0); /* We didn't match the extended glob pattern, but that's OK, since we can match 0 or 1 occurrences. We need to skip the glob pattern and see if we match the rest of the string. */ newn = PATSCAN (p + 1, pe, 0); /* If NEWN is 0, we have an ill-formed pattern. */ p = newn ? newn : pe; } #endif else if (c == L('?')) { if (sc == L('\0')) return FNM_NOMATCH; /* One character of the string is consumed in matching this ? wildcard, so *??? won't match if there are fewer than three characters. */ n++; sc = n < se ? *n : '\0'; } #ifdef EXTENDED_GLOB /* Handle ******(patlist) */ if ((flags & FNM_EXTMATCH) && c == L('*') && *p == L('(')) /*)*/ { CHAR *newn; /* We need to check whether or not the extended glob pattern matches the remainder of the string. If it does, we match the entire pattern. */ for (newn = n; newn < se; ++newn) { if (EXTMATCH (c, newn, se, p, pe, flags) == 0) return (0); } /* We didn't match the extended glob pattern, but that's OK, since we can match 0 or more occurrences. We need to skip the glob pattern and see if we match the rest of the string. */ newn = PATSCAN (p + 1, pe, 0); /* If NEWN is 0, we have an ill-formed pattern. */ p = newn ? newn : pe; } #endif if (p == pe) break; } /* The wildcards are the last element of the pattern. The name cannot match completely if we are looking for a pathname and it contains another slash, unless FNM_LEADING_DIR is set. */ if (c == L('\0')) { int r = (flags & FNM_PATHNAME) == 0 ? 0 : FNM_NOMATCH; if (flags & FNM_PATHNAME) { if (flags & FNM_LEADING_DIR) r = 0; else if (MEMCHR (n, L('/'), se - n) == NULL) r = 0; } return r; } /* If we've hit the end of the pattern and the last character of the pattern was handled by the loop above, we've succeeded. Otherwise, we need to match that last character. */ if (p == pe && (c == L('?') || c == L('*'))) return (0); /* If we've hit the end of the string and the rest of the pattern is something that matches the empty string, we can succeed. */ #if defined (EXTENDED_GLOB) if (n == se && ((flags & FNM_EXTMATCH) && (c == L('!') || c == L('?')) && *p == L('('))) { --p; if (EXTMATCH (c, n, se, p, pe, flags) == 0) return (c == L('!') ? FNM_NOMATCH : 0); return (c == L('!') ? 0 : FNM_NOMATCH); } #endif /* If we stop at a slash in the pattern and we are looking for a pathname ([star]/foo), then consume enough of the string to stop at any slash and then try to match the rest of the pattern. If the string doesn't contain a slash, fail */ if (c == L('/') && (flags & FNM_PATHNAME)) { while (n < se && *n != L('/')) ++n; if (n < se && *n == L('/') && (GMATCH (n+1, se, p, pe, NULL, flags) == 0)) return 0; return FNM_NOMATCH; /* XXX */ } /* General case, use recursion. */ { U_CHAR c1; const CHAR *endp; struct STRUCT end; end.pattern = NULL; endp = MEMCHR (n, (flags & FNM_PATHNAME) ? L('/') : L('\0'), se - n); if (endp == 0) endp = se; c1 = ((flags & FNM_NOESCAPE) == 0 && c == L('\\')) ? *p : c; c1 = FOLD (c1); for (--p; n < endp; ++n) { /* Only call strmatch if the first character indicates a possible match. We can check the first character if we're not doing an extended glob match. */ if ((flags & FNM_EXTMATCH) == 0 && c != L('[') && FOLD (*n) != c1) /*]*/ continue; /* If we're doing an extended glob match and the pattern is not one of the extended glob patterns, we can check the first character. */ if ((flags & FNM_EXTMATCH) && p[1] != L('(') && /*)*/ STRCHR (L("?*+@!"), *p) == 0 && c != L('[') && FOLD (*n) != c1) /*]*/ continue; /* Otherwise, we just recurse. */ if (GMATCH (n, se, p, pe, &end, flags & ~(FNM_PERIOD|FNM_DOTDOT)) == 0) { if (end.pattern == NULL) return (0); break; } } /* This is a clever idea from glibc, used to avoid backtracking to a `*' that appears earlier in the pattern. We get away without saving se and pe because they are always the same, even in the recursive calls to gmatch */ if (end.pattern != NULL) { p = end.pattern; n = end.string; continue; } return FNM_NOMATCH; } case L('['): { if (sc == L('\0') || n == se) return FNM_NOMATCH; /* A character class cannot match a `.' if it is the first character of the string or if it is the first character following a slash and we are matching a pathname. */ if ((flags & FNM_PERIOD) && sc == L('.') && (n == string || ((flags & FNM_PATHNAME) && n[-1] == L('/')))) return (FNM_NOMATCH); /* `?' cannot match `.' or `..' if it is the first character of the string or if it is the first character following a slash and we are matching a pathname. */ if ((flags & FNM_DOTDOT) && ((n == string && SDOT_OR_DOTDOT(n)) || ((flags & FNM_PATHNAME) && n[-1] == L('/') && PDOT_OR_DOTDOT(n)))) return FNM_NOMATCH; p = BRACKMATCH (p, sc, flags); if (p == 0) return FNM_NOMATCH; } break; default: if ((U_CHAR)c != FOLD (sc)) return (FNM_NOMATCH); } ++n; } if (n == se) return (0); if ((flags & FNM_LEADING_DIR) && *n == L('/')) /* The FNM_LEADING_DIR flag says that "foo*" matches "foobar/frobozz". */ return 0; return (FNM_NOMATCH); } /* Parse a bracket expression collating symbol ([.sym.]) starting at P, find the value of the symbol, and move P past the collating symbol expression. The value is returned in *VP, if VP is not null. */ static CHAR * PARSE_COLLSYM (p, vp) CHAR *p; INT *vp; { register int pc; INT val; p++; /* move past the `.' */ for (pc = 0; p[pc]; pc++) if (p[pc] == L('.') && p[pc+1] == L(']')) break; if (p[pc] == 0) { if (vp) *vp = INVALID; return (p + pc); } val = COLLSYM (p, pc); if (vp) *vp = val; return (p + pc + 2); } /* Use prototype definition here because of type promotion. */ static CHAR * #if defined (PROTOTYPES) BRACKMATCH (CHAR *p, U_CHAR test, int flags) #else BRACKMATCH (p, test, flags) CHAR *p; U_CHAR test; int flags; #endif { register CHAR cstart, cend, c; register int not; /* Nonzero if the sense of the character class is inverted. */ int brcnt, forcecoll, isrange; INT pc; CHAR *savep; CHAR *brchrp; U_CHAR orig_test; orig_test = test; test = FOLD (orig_test); savep = p; /* POSIX.2 3.13.1 says that an exclamation mark (`!') shall replace the circumflex (`^') in its role in a `nonmatching list'. A bracket expression starting with an unquoted circumflex character produces unspecified results. This implementation treats the two identically. */ if (not = (*p == L('!') || *p == L('^'))) ++p; c = *p++; for (;;) { /* Initialize cstart and cend in case `-' is the last character of the pattern. */ cstart = cend = c; forcecoll = 0; /* POSIX.2 equivalence class: [=c=]. See POSIX.2 2.8.3.2. Find the end of the equivalence class, move the pattern pointer past it, and check for equivalence. XXX - this handles only single-character equivalence classes, which is wrong, or at least incomplete. */ if (c == L('[') && *p == L('=') && p[2] == L('=') && p[3] == L(']')) { pc = FOLD (p[1]); p += 4; if (COLLEQUIV (test, pc)) { /*[*/ /* Move past the closing `]', since the first thing we do at the `matched:' label is back p up one. */ p++; goto matched; } else { c = *p++; if (c == L('\0')) return ((test == L('[')) ? savep : (CHAR *)0); /*]*/ c = FOLD (c); continue; } } /* POSIX.2 character class expression. See POSIX.2 2.8.3.2. */ if (c == L('[') && *p == L(':')) { CHAR *close, *ccname; pc = 0; /* make sure invalid char classes don't match. */ /* Find end of character class name */ for (close = p + 1; *close != '\0'; close++) if (*close == L(':') && *(close+1) == L(']')) break; if (*close != L('\0')) { ccname = (CHAR *)malloc ((close - p) * sizeof (CHAR)); if (ccname == 0) pc = 0; else { bcopy (p + 1, ccname, (close - p - 1) * sizeof (CHAR)); *(ccname + (close - p - 1)) = L('\0'); /* As a result of a POSIX discussion, char class names are allowed to be quoted (?) */ DEQUOTE_PATHNAME (ccname); pc = IS_CCLASS (orig_test, (XCHAR *)ccname); } if (pc == -1) { /* CCNAME is not a valid character class in the current locale. In addition to noting no match (pc = 0), we have a choice about what to do with the invalid charclass. Posix leaves the behavior unspecified, but we're going to skip over the charclass and keep going instead of testing ORIG_TEST against each character in the class string. If we don't want to do that, take out the update of P. */ pc = 0; p = close + 2; } else p = close + 2; /* move past the closing `]' */ free (ccname); } if (pc) { /*[*/ /* Move past the closing `]', since the first thing we do at the `matched:' label is back p up one. */ p++; goto matched; } else { /* continue the loop here, since this expression can't be the first part of a range expression. */ c = *p++; if (c == L('\0')) return ((test == L('[')) ? savep : (CHAR *)0); else if (c == L(']')) break; c = FOLD (c); continue; } } /* POSIX.2 collating symbols. See POSIX.2 2.8.3.2. Find the end of the symbol name, make sure it is terminated by `.]', translate the name to a character using the external table, and do the comparison. */ if (c == L('[') && *p == L('.')) { p = PARSE_COLLSYM (p, &pc); /* An invalid collating symbol cannot be the first point of a range. If it is, we set cstart to one greater than `test', so any comparisons later will fail. */ cstart = (pc == INVALID) ? test + 1 : pc; forcecoll = 1; } if (!(flags & FNM_NOESCAPE) && c == L('\\')) { if (*p == '\0') return (CHAR *)0; cstart = cend = *p++; } cstart = cend = FOLD (cstart); isrange = 0; /* POSIX.2 2.8.3.1.2 says: `An expression containing a `[' that is not preceded by a backslash and is not part of a bracket expression produces undefined results.' This implementation treats the `[' as just a character to be matched if there is not a closing `]'. */ if (c == L('\0')) return ((test == L('[')) ? savep : (CHAR *)0); c = *p++; c = FOLD (c); if (c == L('\0')) return ((test == L('[')) ? savep : (CHAR *)0); if ((flags & FNM_PATHNAME) && c == L('/')) /* [/] can never match when matching a pathname. */ return (CHAR *)0; /* This introduces a range, unless the `-' is the last character of the class. Find the end of the range and move past it. */ if (c == L('-') && *p != L(']')) { cend = *p++; if (!(flags & FNM_NOESCAPE) && cend == L('\\')) cend = *p++; if (cend == L('\0')) return (CHAR *)0; if (cend == L('[') && *p == L('.')) { p = PARSE_COLLSYM (p, &pc); /* An invalid collating symbol cannot be the second part of a range expression. If we get one, we set cend to one fewer than the test character to make sure the range test fails. */ cend = (pc == INVALID) ? test - 1 : pc; forcecoll = 1; } cend = FOLD (cend); c = *p++; /* POSIX.2 2.8.3.2: ``The ending range point shall collate equal to or higher than the starting range point; otherwise the expression shall be treated as invalid.'' Note that this applies to only the range expression; the rest of the bracket expression is still checked for matches. */ if (RANGECMP (cstart, cend, forcecoll) > 0) { if (c == L(']')) break; c = FOLD (c); continue; } isrange = 1; } if (isrange == 0 && test == cstart) goto matched; if (isrange && RANGECMP (test, cstart, forcecoll) >= 0 && RANGECMP (test, cend, forcecoll) <= 0) goto matched; if (c == L(']')) break; } /* No match. */ return (!not ? (CHAR *)0 : p); matched: /* Skip the rest of the [...] that already matched. */ c = *--p; brcnt = 1; brchrp = 0; while (brcnt > 0) { int oc; /* A `[' without a matching `]' is just another character to match. */ if (c == L('\0')) return ((test == L('[')) ? savep : (CHAR *)0); oc = c; c = *p++; if (c == L('[') && (*p == L('=') || *p == L(':') || *p == L('.'))) { brcnt++; brchrp = p++; /* skip over the char after the left bracket */ if ((c = *p) == L('\0')) return ((test == L('[')) ? savep : (CHAR *)0); /* If *brchrp == ':' we should check that the rest of the characters form a valid character class name. We don't do that yet, but we keep BRCHRP in case we want to. */ } /* We only want to check brchrp if we set it above. */ else if (c == L(']') && brcnt > 1 && brchrp != 0 && oc == *brchrp) { brcnt--; brchrp = 0; /* just in case */ } /* Left bracket loses its special meaning inside a bracket expression. It is only valid when followed by a `.', `=', or `:', which we check for above. Technically the right bracket can appear in a collating symbol, so we check for that here. Otherwise, it terminates the bracket expression. */ else if (c == L(']') && (brchrp == 0 || *brchrp != L('.')) && brcnt >= 1) brcnt = 0; else if (!(flags & FNM_NOESCAPE) && c == L('\\')) { if (*p == '\0') return (CHAR *)0; /* XXX 1003.2d11 is unclear if this is right. */ ++p; } } return (not ? (CHAR *)0 : p); } #if defined (EXTENDED_GLOB) /* ksh-like extended pattern matching: [?*+@!](pat-list) where pat-list is a list of one or patterns separated by `|'. Operation is as follows: ?(patlist) match zero or one of the given patterns *(patlist) match zero or more of the given patterns +(patlist) match one or more of the given patterns @(patlist) match exactly one of the given patterns !(patlist) match anything except one of the given patterns */ /* Scan a pattern starting at STRING and ending at END, keeping track of embedded () and []. If DELIM is 0, we scan until a matching `)' because we're scanning a `patlist'. Otherwise, we scan until we see DELIM. In all cases, we never scan past END. The return value is the first character after the matching DELIM or NULL if the pattern is empty or invalid. */ /*static*/ CHAR * PATSCAN (string, end, delim) CHAR *string, *end; INT delim; { int pnest, bnest, skip; INT cchar; CHAR *s, c, *bfirst; pnest = bnest = skip = 0; cchar = 0; bfirst = NULL; if (string == end) return (NULL); for (s = string; c = *s; s++) { if (s >= end) return (s); if (skip) { skip = 0; continue; } switch (c) { case L('\\'): skip = 1; break; case L('\0'): return ((CHAR *)NULL); /* `[' is not special inside a bracket expression, but it may introduce one of the special POSIX bracket expressions ([.SYM.], [=c=], [: ... :]) that needs special handling. */ case L('['): if (bnest == 0) { bfirst = s + 1; if (*bfirst == L('!') || *bfirst == L('^')) bfirst++; bnest++; } else if (s[1] == L(':') || s[1] == L('.') || s[1] == L('=')) cchar = s[1]; break; /* `]' is not special if it's the first char (after a leading `!' or `^') in a bracket expression or if it's part of one of the special POSIX bracket expressions ([.SYM.], [=c=], [: ... :]) */ case L(']'): if (bnest) { if (cchar && s[-1] == cchar) cchar = 0; else if (s != bfirst) { bnest--; bfirst = 0; } } break; case L('('): if (bnest == 0) pnest++; break; case L(')'): if (bnest == 0 && pnest-- <= 0) return ++s; break; case L('|'): if (bnest == 0 && pnest == 0 && delim == L('|')) return ++s; break; } } return (NULL); } /* Return 0 if dequoted pattern matches S in the current locale. */ static int STRCOMPARE (p, pe, s, se) CHAR *p, *pe, *s, *se; { int ret; CHAR c1, c2; int l1, l2; l1 = pe - p; l2 = se - s; if (l1 != l2) return (FNM_NOMATCH); /* unequal lengths, can't be identical */ c1 = *pe; c2 = *se; if (c1 != 0) *pe = '\0'; if (c2 != 0) *se = '\0'; #if HAVE_MULTIBYTE || defined (HAVE_STRCOLL) ret = STRCOLL ((XCHAR *)p, (XCHAR *)s); #else ret = STRCMP ((XCHAR *)p, (XCHAR *)s); #endif if (c1 != 0) *pe = c1; if (c2 != 0) *se = c2; return (ret == 0 ? ret : FNM_NOMATCH); } /* Match a ksh extended pattern specifier. Return FNM_NOMATCH on failure or 0 on success. This is handed the entire rest of the pattern and string the first time an extended pattern specifier is encountered, so it calls gmatch recursively. */ static int EXTMATCH (xc, s, se, p, pe, flags) INT xc; /* select which operation */ CHAR *s, *se; CHAR *p, *pe; int flags; { CHAR *prest; /* pointer to rest of pattern */ CHAR *psub; /* pointer to sub-pattern */ CHAR *pnext; /* pointer to next sub-pattern */ CHAR *srest; /* pointer to rest of string */ int m1, m2, xflags; /* xflags = flags passed to recursive matches */ #if DEBUG_MATCHING fprintf(stderr, "extmatch: xc = %c\n", xc); fprintf(stderr, "extmatch: s = %s; se = %s\n", s, se); fprintf(stderr, "extmatch: p = %s; pe = %s\n", p, pe); fprintf(stderr, "extmatch: flags = %d\n", flags); #endif prest = PATSCAN (p + (*p == L('(')), pe, 0); /* ) */ if (prest == 0) /* If PREST is 0, we failed to scan a valid pattern. In this case, we just want to compare the two as strings. */ return (STRCOMPARE (p - 1, pe, s, se)); switch (xc) { case L('+'): /* match one or more occurrences */ case L('*'): /* match zero or more occurrences */ /* If we can get away with no matches, don't even bother. Just call GMATCH on the rest of the pattern and return success if it succeeds. */ if (xc == L('*') && (GMATCH (s, se, prest, pe, NULL, flags) == 0)) return 0; /* OK, we have to do this the hard way. First, we make sure one of the subpatterns matches, then we try to match the rest of the string. */ for (psub = p + 1; ; psub = pnext) { pnext = PATSCAN (psub, pe, L('|')); for (srest = s; srest <= se; srest++) { /* Match this substring (S -> SREST) against this subpattern (psub -> pnext - 1) */ m1 = GMATCH (s, srest, psub, pnext - 1, NULL, flags) == 0; /* OK, we matched a subpattern, so make sure the rest of the string matches the rest of the pattern. Also handle multiple matches of the pattern. */ if (m1) { /* if srest > s, we are not at start of string */ xflags = (srest > s) ? (flags & ~(FNM_PERIOD|FNM_DOTDOT)) : flags; m2 = (GMATCH (srest, se, prest, pe, NULL, xflags) == 0) || (s != srest && GMATCH (srest, se, p - 1, pe, NULL, xflags) == 0); } if (m1 && m2) return (0); } if (pnext == prest) break; } return (FNM_NOMATCH); case L('?'): /* match zero or one of the patterns */ case L('@'): /* match one (or more) of the patterns */ /* If we can get away with no matches, don't even bother. Just call gmatch on the rest of the pattern and return success if it succeeds. */ if (xc == L('?') && (GMATCH (s, se, prest, pe, NULL, flags) == 0)) return 0; /* OK, we have to do this the hard way. First, we see if one of the subpatterns matches, then, if it does, we try to match the rest of the string. */ for (psub = p + 1; ; psub = pnext) { pnext = PATSCAN (psub, pe, L('|')); srest = (prest == pe) ? se : s; for ( ; srest <= se; srest++) { /* if srest > s, we are not at start of string */ xflags = (srest > s) ? (flags & ~(FNM_PERIOD|FNM_DOTDOT)) : flags; if (GMATCH (s, srest, psub, pnext - 1, NULL, flags) == 0 && GMATCH (srest, se, prest, pe, NULL, xflags) == 0) return (0); } if (pnext == prest) break; } return (FNM_NOMATCH); case '!': /* match anything *except* one of the patterns */ for (srest = s; srest <= se; srest++) { m1 = 0; for (psub = p + 1; ; psub = pnext) { pnext = PATSCAN (psub, pe, L('|')); /* If one of the patterns matches, just bail immediately. */ if (m1 = (GMATCH (s, srest, psub, pnext - 1, NULL, flags) == 0)) break; if (pnext == prest) break; } /* If nothing matched, but the string starts with a period and we need to match periods explicitly, don't return this as a match, even for negation. */ if (m1 == 0 && (flags & FNM_PERIOD) && *s == '.') return (FNM_NOMATCH); if (m1 == 0 && (flags & FNM_DOTDOT) && (SDOT_OR_DOTDOT (s) || ((flags & FNM_PATHNAME) && s[-1] == L('/') && PDOT_OR_DOTDOT(s)))) return (FNM_NOMATCH); /* if srest > s, we are not at start of string */ xflags = (srest > s) ? (flags & ~(FNM_PERIOD|FNM_DOTDOT)) : flags; if (m1 == 0 && GMATCH (srest, se, prest, pe, NULL, xflags) == 0) return (0); } return (FNM_NOMATCH); } return (FNM_NOMATCH); } #endif /* EXTENDED_GLOB */ #undef IS_CCLASS #undef FOLD #undef CHAR #undef U_CHAR #undef XCHAR #undef INT #undef INVALID #undef FCT #undef GMATCH #undef COLLSYM #undef PARSE_COLLSYM #undef PATSCAN #undef STRCOMPARE #undef EXTMATCH #undef DEQUOTE_PATHNAME #undef STRUCT #undef BRACKMATCH #undef STRCHR #undef STRCOLL #undef STRLEN #undef STRCMP #undef MEMCHR #undef COLLEQUIV #undef RANGECMP #undef ISDIRSEP #undef PATHSEP #undef PDOT_OR_DOTDOT #undef SDOT_OR_DOTDOT #undef L