[337] | 1 | #include <glob.h>
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| 2 | #include <fnmatch.h>
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| 3 | #include <sys/stat.h>
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| 4 | #include <dirent.h>
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| 5 | #include <limits.h>
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| 6 | #include <string.h>
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| 7 | #include <stdlib.h>
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| 8 | #include <errno.h>
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| 9 | #include <stddef.h>
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| 10 | #include "libc.h"
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| 11 |
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| 12 | struct match
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| 13 | {
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| 14 | struct match *next;
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| 15 | char name[1];
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| 16 | };
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| 17 |
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| 18 | static int is_literal(const char *p, int useesc)
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| 19 | {
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| 20 | int bracket = 0;
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| 21 | for (; *p; p++) {
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| 22 | switch (*p) {
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| 23 | case '\\':
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| 24 | if (!useesc) break;
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| 25 | case '?':
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| 26 | case '*':
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| 27 | return 0;
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| 28 | case '[':
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| 29 | bracket = 1;
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| 30 | break;
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| 31 | case ']':
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| 32 | if (bracket) return 0;
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| 33 | break;
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| 34 | }
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| 35 | }
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| 36 | return 1;
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| 37 | }
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| 38 |
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| 39 | static int append(struct match **tail, const char *name, size_t len, int mark)
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| 40 | {
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| 41 | struct match *new = malloc(sizeof(struct match) + len + 1);
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| 42 | if (!new) return -1;
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| 43 | (*tail)->next = new;
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| 44 | new->next = NULL;
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| 45 | strcpy(new->name, name);
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| 46 | if (mark) strcat(new->name, "/");
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| 47 | *tail = new;
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| 48 | return 0;
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| 49 | }
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| 50 |
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| 51 | static int match_in_dir(const char *d, const char *p, int flags, int (*errfunc)(const char *path, int err), struct match **tail)
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| 52 | {
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| 53 | DIR *dir;
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| 54 | struct dirent de_buf, *de;
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| 55 | char pat[strlen(p)+1];
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| 56 | char *p2;
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| 57 | size_t l = strlen(d);
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| 58 | int literal;
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| 59 | int fnm_flags= ((flags & GLOB_NOESCAPE) ? FNM_NOESCAPE : 0)
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| 60 | | ((!(flags & GLOB_PERIOD)) ? FNM_PERIOD : 0);
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| 61 | int error;
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| 62 |
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| 63 | if ((p2 = strchr(p, '/'))) {
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| 64 | strcpy(pat, p);
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| 65 | pat[p2-p] = 0;
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| 66 | for (; *p2 == '/'; p2++);
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| 67 | p = pat;
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| 68 | }
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| 69 | literal = is_literal(p, !(flags & GLOB_NOESCAPE));
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| 70 | if (*d == '/' && !*(d+1)) l = 0;
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| 71 |
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| 72 | /* rely on opendir failing for nondirectory objects */
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| 73 | dir = opendir(*d ? d : ".");
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| 74 | error = errno;
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| 75 | if (!dir) {
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| 76 | /* this is not an error -- we let opendir call stat for us */
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| 77 | if (error == ENOTDIR) return 0;
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| 78 | if (error == EACCES && !*p) {
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| 79 | struct stat st;
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| 80 | if (!stat(d, &st) && S_ISDIR(st.st_mode)) {
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| 81 | if (append(tail, d, l, l))
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| 82 | return GLOB_NOSPACE;
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| 83 | return 0;
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| 84 | }
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| 85 | }
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| 86 | if (errfunc(d, error) || (flags & GLOB_ERR))
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| 87 | return GLOB_ABORTED;
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| 88 | return 0;
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| 89 | }
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| 90 | if (!*p) {
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| 91 | error = append(tail, d, l, l) ? GLOB_NOSPACE : 0;
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| 92 | closedir(dir);
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| 93 | return error;
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| 94 | }
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| 95 | while (!(error = readdir_r(dir, &de_buf, &de)) && de) {
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| 96 | char namebuf[l+de->d_reclen+2], *name = namebuf;
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| 97 | if (!literal && fnmatch(p, de->d_name, fnm_flags))
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| 98 | continue;
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| 99 | if (literal && strcmp(p, de->d_name))
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| 100 | continue;
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| 101 | if (p2 && de->d_type && !S_ISDIR(de->d_type<<12) && !S_ISLNK(de->d_type<<12))
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| 102 | continue;
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| 103 | /* With GLOB_PERIOD, don't allow matching . or .. unless
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| 104 | * fnmatch would match them with FNM_PERIOD rules in effect. */
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| 105 | if (p2 && (flags & GLOB_PERIOD) && de->d_name[0]=='.'
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| 106 | && (!de->d_name[1] || de->d_name[1]=='.' && !de->d_name[2])
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| 107 | && fnmatch(p, de->d_name, fnm_flags | FNM_PERIOD))
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| 108 | continue;
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| 109 | if (*d) {
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| 110 | memcpy(name, d, l);
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| 111 | name[l] = '/';
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| 112 | strcpy(name+l+1, de->d_name);
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| 113 | } else {
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| 114 | name = de->d_name;
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| 115 | }
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| 116 | if (p2) {
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| 117 | if ((error = match_in_dir(name, p2, flags, errfunc, tail))) {
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| 118 | closedir(dir);
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| 119 | return error;
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| 120 | }
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| 121 | } else {
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| 122 | int mark = 0;
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| 123 | if (flags & GLOB_MARK) {
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| 124 | if (de->d_type && !S_ISLNK(de->d_type<<12))
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| 125 | mark = S_ISDIR(de->d_type<<12);
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| 126 | else {
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| 127 | struct stat st;
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| 128 | stat(name, &st);
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| 129 | mark = S_ISDIR(st.st_mode);
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| 130 | }
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| 131 | }
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| 132 | if (append(tail, name, l+de->d_reclen+1, mark)) {
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| 133 | closedir(dir);
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| 134 | return GLOB_NOSPACE;
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| 135 | }
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| 136 | }
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| 137 | }
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| 138 | closedir(dir);
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| 139 | if (error && (errfunc(d, error) || (flags & GLOB_ERR)))
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| 140 | return GLOB_ABORTED;
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| 141 | return 0;
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| 142 | }
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| 143 |
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| 144 | static int ignore_err(const char *path, int err)
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| 145 | {
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| 146 | return 0;
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| 147 | }
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| 148 |
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| 149 | static void freelist(struct match *head)
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| 150 | {
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| 151 | struct match *match, *next;
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| 152 | for (match=head->next; match; match=next) {
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| 153 | next = match->next;
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| 154 | free(match);
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| 155 | }
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| 156 | }
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| 157 |
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| 158 | static int sort(const void *a, const void *b)
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| 159 | {
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| 160 | return strcmp(*(const char **)a, *(const char **)b);
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| 161 | }
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| 162 |
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| 163 | int glob(const char *restrict pat, int flags, int (*errfunc)(const char *path, int err), glob_t *restrict g)
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| 164 | {
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| 165 | const char *p=pat, *d;
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| 166 | struct match head = { .next = NULL }, *tail = &head;
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| 167 | size_t cnt, i;
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| 168 | size_t offs = (flags & GLOB_DOOFFS) ? g->gl_offs : 0;
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| 169 | int error = 0;
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| 170 |
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| 171 | if (*p == '/') {
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| 172 | for (; *p == '/'; p++);
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| 173 | d = "/";
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| 174 | } else {
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| 175 | d = "";
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| 176 | }
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| 177 |
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| 178 | if (!errfunc) errfunc = ignore_err;
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| 179 |
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| 180 | if (!(flags & GLOB_APPEND)) {
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| 181 | g->gl_offs = offs;
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| 182 | g->gl_pathc = 0;
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| 183 | g->gl_pathv = NULL;
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| 184 | }
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| 185 |
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| 186 | if (strnlen(p, PATH_MAX+1) > PATH_MAX) return GLOB_NOSPACE;
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| 187 |
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| 188 | if (*pat) error = match_in_dir(d, p, flags, errfunc, &tail);
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| 189 | if (error == GLOB_NOSPACE) {
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| 190 | freelist(&head);
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| 191 | return error;
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| 192 | }
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| 193 |
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| 194 | for (cnt=0, tail=head.next; tail; tail=tail->next, cnt++);
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| 195 | if (!cnt) {
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| 196 | if (flags & GLOB_NOCHECK) {
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| 197 | tail = &head;
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| 198 | if (append(&tail, pat, strlen(pat), 0))
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| 199 | return GLOB_NOSPACE;
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| 200 | cnt++;
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| 201 | } else
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| 202 | return GLOB_NOMATCH;
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| 203 | }
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| 204 |
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| 205 | if (flags & GLOB_APPEND) {
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| 206 | char **pathv = realloc(g->gl_pathv, (offs + g->gl_pathc + cnt + 1) * sizeof(char *));
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| 207 | if (!pathv) {
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| 208 | freelist(&head);
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| 209 | return GLOB_NOSPACE;
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| 210 | }
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| 211 | g->gl_pathv = pathv;
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| 212 | offs += g->gl_pathc;
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| 213 | } else {
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| 214 | g->gl_pathv = malloc((offs + cnt + 1) * sizeof(char *));
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| 215 | if (!g->gl_pathv) {
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| 216 | freelist(&head);
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| 217 | return GLOB_NOSPACE;
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| 218 | }
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| 219 | for (i=0; i<offs; i++)
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| 220 | g->gl_pathv[i] = NULL;
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| 221 | }
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| 222 | for (i=0, tail=head.next; i<cnt; tail=tail->next, i++)
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| 223 | g->gl_pathv[offs + i] = tail->name;
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| 224 | g->gl_pathv[offs + i] = NULL;
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| 225 | g->gl_pathc += cnt;
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| 226 |
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| 227 | if (!(flags & GLOB_NOSORT))
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| 228 | qsort(g->gl_pathv+offs, cnt, sizeof(char *), sort);
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| 229 |
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| 230 | return error;
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| 231 | }
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| 232 |
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| 233 | void globfree(glob_t *g)
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| 234 | {
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| 235 | size_t i;
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| 236 | for (i=0; i<g->gl_pathc; i++)
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| 237 | free(g->gl_pathv[g->gl_offs + i] - offsetof(struct match, name));
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| 238 | free(g->gl_pathv);
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| 239 | g->gl_pathc = 0;
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| 240 | g->gl_pathv = NULL;
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| 241 | }
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| 242 |
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| 243 | LFS64(glob);
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| 244 | LFS64(globfree);
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