--- /dev/null
+/*
+ * Copyright (c) Ian F. Darwin 1986-1995.
+ * Software written by Ian F. Darwin and others;
+ * maintained 1995-present by Christos Zoulas and others.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice immediately at the beginning of the file, without modification,
+ * this list of conditions, and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+/*
+ * apprentice - make one pass through /etc/magic, learning its secrets.
+ */
+
+#include "file.h"
+#include "magic.h"
+#include "patchlevel.h"
+#include <stdlib.h>
+//#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+//#endif
+#include <string.h>
+#include <assert.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+#ifdef QUICK
+#include <sys/mman.h>
+#endif
+#include <sys/types.h>
+#include <dirent.h>
+
+#ifndef lint
+FILE_RCSID("@(#)$File: apprentice.c,v 1.132 2008/03/28 18:19:30 christos Exp $")
+#endif /* lint */
+
+#define EATAB {while (isascii((unsigned char) *l) && \
+ isspace((unsigned char) *l)) ++l;}
+#define LOWCASE(l) (isupper((unsigned char) (l)) ? \
+ tolower((unsigned char) (l)) : (l))
+/*
+ * Work around a bug in headers on Digital Unix.
+ * At least confirmed for: OSF1 V4.0 878
+ */
+#if defined(__osf__) && defined(__DECC)
+#ifdef MAP_FAILED
+#undef MAP_FAILED
+#endif
+#endif
+
+#ifndef MAP_FAILED
+#define MAP_FAILED (void *) -1
+#endif
+
+#ifndef MAP_FILE
+#define MAP_FILE 0
+#endif
+
+#ifndef MAXPATHLEN
+#define MAXPATHLEN 1024
+#endif
+
+struct magic_entry {
+ struct magic *mp;
+ uint32_t cont_count;
+ uint32_t max_count;
+};
+
+int file_formats[FILE_NAMES_SIZE];
+const size_t file_nformats = FILE_NAMES_SIZE;
+const char *file_names[FILE_NAMES_SIZE];
+const size_t file_nnames = FILE_NAMES_SIZE;
+
+private int getvalue(struct magic_set *ms, struct magic *, const char **, int);
+private int hextoint(int);
+private const char *getstr(struct magic_set *, const char *, char *, int,
+ int *, int);
+private int parse(struct magic_set *, struct magic_entry **, uint32_t *,
+ const char *, size_t, int);
+private int parse_mime(struct magic_set *, struct magic_entry **, uint32_t *,
+ const char *);
+private void eatsize(const char **);
+private int apprentice_1(struct magic_set *, const char *, int, struct mlist *);
+private size_t apprentice_magic_strength(const struct magic *);
+private int apprentice_sort(const void *, const void *);
+private int apprentice_load(struct magic_set *, struct magic **, uint32_t *,
+ const char *, int);
+private void byteswap(struct magic *, uint32_t);
+private void bs1(struct magic *);
+private uint16_t swap2(uint16_t);
+private uint32_t swap4(uint32_t);
+private uint64_t swap8(uint64_t);
+private void mkdbname(const char *, char **, int);
+private int apprentice_map(struct magic_set *, struct magic **, uint32_t *,
+ const char *);
+private int apprentice_compile(struct magic_set *, struct magic **, uint32_t *,
+ const char *);
+private int check_format_type(const char *, int);
+private int check_format(struct magic_set *, struct magic *);
+private int get_op(char);
+
+private size_t maxmagic = 0;
+private size_t magicsize = sizeof(struct magic);
+
+private const char usg_hdr[] = "cont\toffset\ttype\topcode\tmask\tvalue\tdesc";
+private const char mime_marker[] = "!:mime";
+private const size_t mime_marker_len = sizeof(mime_marker) - 1;
+
+#ifdef COMPILE_ONLY
+
+int main(int, char *[]);
+
+int
+main(int argc, char *argv[])
+{
+ int ret;
+ struct magic_set *ms;
+ char *progname;
+
+ if ((progname = strrchr(argv[0], '/')) != NULL)
+ progname++;
+ else
+ progname = argv[0];
+
+ if (argc != 2) {
+ (void)fprintf(stderr, "Usage: %s file\n", progname);
+ return 1;
+ }
+
+ if ((ms = magic_open(MAGIC_CHECK)) == NULL) {
+ (void)fprintf(stderr, "%s: %s\n", progname, strerror(errno));
+ return 1;
+ }
+ ret = magic_compile(ms, argv[1]) == -1 ? 1 : 0;
+ if (ret == 1)
+ (void)fprintf(stderr, "%s: %s\n", progname, magic_error(ms));
+ magic_close(ms);
+ return ret;
+}
+#endif /* COMPILE_ONLY */
+
+#ifdef PHP_BUNDLE
+#include "../data_file.c"
+#endif
+
+static const struct type_tbl_s {
+ const char name[16];
+ const size_t len;
+ const int type;
+ const int format;
+} type_tbl[] = {
+# define XX(s) s, (sizeof(s) - 1)
+# define XX_NULL "", 0
+ { XX("byte"), FILE_BYTE, FILE_FMT_NUM },
+ { XX("short"), FILE_SHORT, FILE_FMT_NUM },
+ { XX("default"), FILE_DEFAULT, FILE_FMT_STR },
+ { XX("long"), FILE_LONG, FILE_FMT_NUM },
+ { XX("string"), FILE_STRING, FILE_FMT_STR },
+ { XX("date"), FILE_DATE, FILE_FMT_STR },
+ { XX("beshort"), FILE_BESHORT, FILE_FMT_NUM },
+ { XX("belong"), FILE_BELONG, FILE_FMT_NUM },
+ { XX("bedate"), FILE_BEDATE, FILE_FMT_STR },
+ { XX("leshort"), FILE_LESHORT, FILE_FMT_NUM },
+ { XX("lelong"), FILE_LELONG, FILE_FMT_NUM },
+ { XX("ledate"), FILE_LEDATE, FILE_FMT_STR },
+ { XX("pstring"), FILE_PSTRING, FILE_FMT_STR },
+ { XX("ldate"), FILE_LDATE, FILE_FMT_STR },
+ { XX("beldate"), FILE_BELDATE, FILE_FMT_STR },
+ { XX("leldate"), FILE_LELDATE, FILE_FMT_STR },
+ { XX("regex"), FILE_REGEX, FILE_FMT_STR },
+ { XX("bestring16"), FILE_BESTRING16, FILE_FMT_STR },
+ { XX("lestring16"), FILE_LESTRING16, FILE_FMT_STR },
+ { XX("search"), FILE_SEARCH, FILE_FMT_STR },
+ { XX("medate"), FILE_MEDATE, FILE_FMT_STR },
+ { XX("meldate"), FILE_MELDATE, FILE_FMT_STR },
+ { XX("melong"), FILE_MELONG, FILE_FMT_NUM },
+ { XX("quad"), FILE_QUAD, FILE_FMT_QUAD },
+ { XX("lequad"), FILE_LEQUAD, FILE_FMT_QUAD },
+ { XX("bequad"), FILE_BEQUAD, FILE_FMT_QUAD },
+ { XX("qdate"), FILE_QDATE, FILE_FMT_STR },
+ { XX("leqdate"), FILE_LEQDATE, FILE_FMT_STR },
+ { XX("beqdate"), FILE_BEQDATE, FILE_FMT_STR },
+ { XX("qldate"), FILE_QLDATE, FILE_FMT_STR },
+ { XX("leqldate"), FILE_LEQLDATE, FILE_FMT_STR },
+ { XX("beqldate"), FILE_BEQLDATE, FILE_FMT_STR },
+ { XX("float"), FILE_FLOAT, FILE_FMT_FLOAT },
+ { XX("befloat"), FILE_BEFLOAT, FILE_FMT_FLOAT },
+ { XX("lefloat"), FILE_LEFLOAT, FILE_FMT_FLOAT },
+ { XX("double"), FILE_DOUBLE, FILE_FMT_DOUBLE },
+ { XX("bedouble"), FILE_BEDOUBLE, FILE_FMT_DOUBLE },
+ { XX("ledouble"), FILE_LEDOUBLE, FILE_FMT_DOUBLE },
+ { XX_NULL, FILE_INVALID, FILE_FMT_NONE },
+# undef XX
+# undef XX_NULL
+};
+
+private int
+get_type(const char *l, const char **t)
+{
+ const struct type_tbl_s *p;
+
+ for (p = type_tbl; p->len; p++) {
+ if (strncmp(l, p->name, p->len) == 0) {
+ if (t)
+ *t = l + p->len;
+ break;
+ }
+ }
+ return p->type;
+}
+
+private void
+init_file_tables(void)
+{
+ static int done = 0;
+ const struct type_tbl_s *p;
+
+ if (done)
+ return;
+ done++;
+
+ for (p = type_tbl; p->len; p++) {
+ assert(p->type < FILE_NAMES_SIZE);
+ file_names[p->type] = p->name;
+ file_formats[p->type] = p->format;
+ }
+}
+
+/*
+ * Handle one file or directory.
+ */
+private int
+apprentice_1(struct magic_set *ms, const char *fn, int action,
+ struct mlist *mlist)
+{
+ struct magic *magic = NULL;
+ uint32_t nmagic = 0;
+ struct mlist *ml;
+ int rv = -1;
+ int mapped;
+
+ if (magicsize != FILE_MAGICSIZE) {
+ file_error(ms, 0, "magic element size %lu != %lu",
+ (unsigned long)sizeof(*magic),
+ (unsigned long)FILE_MAGICSIZE);
+ return -1;
+ }
+
+ if (action == FILE_COMPILE) {
+ rv = apprentice_load(ms, &magic, &nmagic, fn, action);
+ if (rv != 0)
+ return -1;
+ rv = apprentice_compile(ms, &magic, &nmagic, fn);
+ free(magic);
+ return rv;
+ }
+
+#ifndef COMPILE_ONLY
+ if ((rv = apprentice_map(ms, &magic, &nmagic, fn)) == -1) {
+ if (ms->flags & MAGIC_CHECK)
+ file_magwarn(ms, "using regular magic file `%s'", fn);
+ rv = apprentice_load(ms, &magic, &nmagic, fn, action);
+ if (rv != 0)
+ return -1;
+ }
+
+ mapped = rv;
+
+ if (magic == NULL) {
+ file_delmagic(magic, mapped, nmagic);
+ return -1;
+ }
+
+ if ((ml = malloc(sizeof(*ml))) == NULL) {
+ file_delmagic(magic, mapped, nmagic);
+ file_oomem(ms, sizeof(*ml));
+ return -1;
+ }
+
+ ml->magic = magic;
+ ml->nmagic = nmagic;
+ ml->mapped = mapped;
+
+ mlist->prev->next = ml;
+ ml->prev = mlist->prev;
+ ml->next = mlist;
+ mlist->prev = ml;
+
+ return 0;
+#endif /* COMPILE_ONLY */
+}
+
+protected void
+file_delmagic(struct magic *p, int type, size_t entries)
+{
+ if (p == NULL)
+ return;
+ switch (type) {
+#ifdef PHP_BUNDLE
+ case 3:
+ /* Do nothing, it's part of the code segment */
+ break;
+#endif
+#ifdef QUICK
+ case 2:
+ p--;
+ (void)munmap((void *)p, sizeof(*p) * (entries + 1));
+ break;
+#endif
+ case 1:
+ p--;
+ /*FALLTHROUGH*/
+ case 0:
+ free(p);
+ break;
+ default:
+ abort();
+ }
+}
+
+/* const char *fn: list of magic files and directories */
+protected struct mlist *
+file_apprentice(struct magic_set *ms, const char *fn, int action)
+{
+ char *p, *mfn;
+ int file_err, errs = -1;
+ struct mlist *mlist;
+
+ init_file_tables();
+
+ if (fn == NULL)
+ fn = getenv("MAGIC");
+ if (fn == NULL) {
+#ifdef PHP_BUNDLE
+ if ((mlist = malloc(sizeof(*mlist))) == NULL) {
+ file_oomem(ms, sizeof(*mlist));
+ return NULL;
+ }
+ mlist->next = mlist->prev = mlist;
+ apprentice_1(ms, fn, action, mlist);
+ return mlist;
+#else
+ fn = MAGIC;
+#endif
+ }
+
+ if ((mfn = strdup(fn)) == NULL) {
+ file_oomem(ms, strlen(fn));
+ return NULL;
+ }
+ fn = mfn;
+
+ if ((mlist = malloc(sizeof(*mlist))) == NULL) {
+ free(mfn);
+ file_oomem(ms, sizeof(*mlist));
+ return NULL;
+ }
+ mlist->next = mlist->prev = mlist;
+
+ while (fn) {
+ p = strchr(fn, PATHSEP);
+ if (p)
+ *p++ = '\0';
+ if (*fn == '\0')
+ break;
+ file_err = apprentice_1(ms, fn, action, mlist);
+ errs = MAX(errs, file_err);
+ fn = p;
+ }
+ if (errs == -1) {
+ free(mfn);
+ free(mlist);
+ mlist = NULL;
+ file_error(ms, 0, "could not find any magic files!");
+ return NULL;
+ }
+ free(mfn);
+ return mlist;
+}
+
+/*
+ * Get weight of this magic entry, for sorting purposes.
+ */
+private size_t
+apprentice_magic_strength(const struct magic *m)
+{
+#define MULT 10
+ size_t val = 2 * MULT; /* baseline strength */
+
+ switch (m->type) {
+ case FILE_DEFAULT: /* make sure this sorts last */
+ return 0;
+
+ case FILE_BYTE:
+ val += 1 * MULT;
+ break;
+
+ case FILE_SHORT:
+ case FILE_LESHORT:
+ case FILE_BESHORT:
+ val += 2 * MULT;
+ break;
+
+ case FILE_LONG:
+ case FILE_LELONG:
+ case FILE_BELONG:
+ case FILE_MELONG:
+ val += 4 * MULT;
+ break;
+
+ case FILE_PSTRING:
+ case FILE_STRING:
+ val += m->vallen * MULT;
+ break;
+
+ case FILE_BESTRING16:
+ case FILE_LESTRING16:
+ val += m->vallen * MULT / 2;
+ break;
+
+ case FILE_SEARCH:
+ case FILE_REGEX:
+ val += m->vallen * MAX(MULT / m->vallen, 1);
+ break;
+
+ case FILE_DATE:
+ case FILE_LEDATE:
+ case FILE_BEDATE:
+ case FILE_MEDATE:
+ case FILE_LDATE:
+ case FILE_LELDATE:
+ case FILE_BELDATE:
+ case FILE_MELDATE:
+ case FILE_FLOAT:
+ case FILE_BEFLOAT:
+ case FILE_LEFLOAT:
+ val += 4 * MULT;
+ break;
+
+ case FILE_QUAD:
+ case FILE_BEQUAD:
+ case FILE_LEQUAD:
+ case FILE_QDATE:
+ case FILE_LEQDATE:
+ case FILE_BEQDATE:
+ case FILE_QLDATE:
+ case FILE_LEQLDATE:
+ case FILE_BEQLDATE:
+ case FILE_DOUBLE:
+ case FILE_BEDOUBLE:
+ case FILE_LEDOUBLE:
+ val += 8 * MULT;
+ break;
+
+ default:
+ val = 0;
+ (void)fprintf(stderr, "Bad type %d\n", m->type);
+ abort();
+ }
+
+ switch (m->reln) {
+ case 'x': /* matches anything penalize */
+ case '!': /* matches almost anything penalize */
+ val = 0;
+ break;
+
+ case '=': /* Exact match, prefer */
+ val += MULT;
+ break;
+
+ case '>':
+ case '<': /* comparison match reduce strength */
+ val -= 2 * MULT;
+ break;
+
+ case '^':
+ case '&': /* masking bits, we could count them too */
+ val -= MULT;
+ break;
+
+ default:
+ (void)fprintf(stderr, "Bad relation %c\n", m->reln);
+ abort();
+ }
+
+ if (val == 0) /* ensure we only return 0 for FILE_DEFAULT */
+ val = 1;
+
+ return val;
+}
+
+/*
+ * Sort callback for sorting entries by "strength" (basically length)
+ */
+private int
+apprentice_sort(const void *a, const void *b)
+{
+ const struct magic_entry *ma = a;
+ const struct magic_entry *mb = b;
+ size_t sa = apprentice_magic_strength(ma->mp);
+ size_t sb = apprentice_magic_strength(mb->mp);
+ if (sa == sb)
+ return 0;
+ else if (sa > sb)
+ return -1;
+ else
+ return 1;
+}
+
+private int
+set_test_type(struct magic *mstart, struct magic *m)
+{
+ switch (m->type) {
+ case FILE_BYTE:
+ case FILE_SHORT:
+ case FILE_LONG:
+ case FILE_DATE:
+ case FILE_BESHORT:
+ case FILE_BELONG:
+ case FILE_BEDATE:
+ case FILE_LESHORT:
+ case FILE_LELONG:
+ case FILE_LEDATE:
+ case FILE_LDATE:
+ case FILE_BELDATE:
+ case FILE_LELDATE:
+ case FILE_MEDATE:
+ case FILE_MELDATE:
+ case FILE_MELONG:
+ case FILE_QUAD:
+ case FILE_LEQUAD:
+ case FILE_BEQUAD:
+ case FILE_QDATE:
+ case FILE_LEQDATE:
+ case FILE_BEQDATE:
+ case FILE_QLDATE:
+ case FILE_LEQLDATE:
+ case FILE_BEQLDATE:
+ case FILE_FLOAT:
+ case FILE_BEFLOAT:
+ case FILE_LEFLOAT:
+ case FILE_DOUBLE:
+ case FILE_BEDOUBLE:
+ case FILE_LEDOUBLE:
+ case FILE_STRING:
+ case FILE_PSTRING:
+ case FILE_BESTRING16:
+ case FILE_LESTRING16:
+ /* binary test, set flag */
+ mstart->flag |= BINTEST;
+ break;
+ case FILE_REGEX:
+ case FILE_SEARCH:
+ /* binary test if pattern is not text */
+ if (file_looks_utf8(m->value.s, m->vallen, NULL, NULL) == 0)
+ mstart->flag |= BINTEST;
+ break;
+ case FILE_DEFAULT:
+ /* can't deduce anything; we shouldn't see this at the
+ top level anyway */
+ break;
+ case FILE_INVALID:
+ default:
+ /* invalid search type, but no need to complain here */
+ break;
+ }
+}
+
+/*
+ * Load and parse one file.
+ */
+private void
+load_1(struct magic_set *ms, int action, const char *fn, int *errs,
+ struct magic_entry **marray, uint32_t *marraycount)
+{
+ char line[BUFSIZ];
+ size_t lineno = 0;
+ FILE *f = fopen(ms->file = fn, "r");
+ if (f == NULL) {
+ if (errno != ENOENT)
+ file_error(ms, errno, "cannot read magic file `%s'",
+ fn);
+ (*errs)++;
+ } else {
+ /* read and parse this file */
+ for (ms->line = 1; fgets(line, sizeof(line), f) != NULL; ms->line++) {
+ size_t len;
+ len = strlen(line);
+ if (len == 0) /* null line, garbage, etc */
+ continue;
+ if (line[len - 1] == '\n') {
+ lineno++;
+ line[len - 1] = '\0'; /* delete newline */
+ }
+ if (line[0] == '\0') /* empty, do not parse */
+ continue;
+ if (line[0] == '#') /* comment, do not parse */
+ continue;
+ if (len > mime_marker_len &&
+ memcmp(line, mime_marker, mime_marker_len) == 0) {
+ /* MIME type */
+ if (parse_mime(ms, marray, marraycount,
+ line + mime_marker_len) != 0)
+ (*errs)++;
+ continue;
+ }
+ if (parse(ms, marray, marraycount, line, lineno, action) != 0)
+ (*errs)++;
+ }
+
+ (void)fclose(f);
+ }
+}
+
+/*
+ * parse a file or directory of files
+ * const char *fn: name of magic file or directory
+ */
+private int
+apprentice_load(struct magic_set *ms, struct magic **magicp, uint32_t *nmagicp,
+ const char *fn, int action)
+{
+ int errs = 0;
+ struct magic_entry *marray;
+ uint32_t marraycount, i, mentrycount = 0, starttest;
+ char subfn[MAXPATHLEN];
+ struct stat st;
+ DIR *dir;
+ struct dirent *d;
+
+ ms->flags |= MAGIC_CHECK; /* Enable checks for parsed files */
+
+ maxmagic = MAXMAGIS;
+ if ((marray = calloc(maxmagic, sizeof(*marray))) == NULL) {
+ file_oomem(ms, maxmagic * sizeof(*marray));
+ return -1;
+ }
+ marraycount = 0;
+
+ /* print silly verbose header for USG compat. */
+ if (action == FILE_CHECK)
+ (void)fprintf(stderr, "%s\n", usg_hdr);
+
+ /* load directory or file */
+ if (stat(fn, &st) == 0 && S_ISDIR(st.st_mode)) {
+ dir = opendir(fn);
+ if (dir) {
+ while (d = readdir(dir)) {
+ snprintf(subfn, sizeof(subfn), "%s/%s",
+ fn, d->d_name);
+ if (stat(subfn, &st) == 0 && S_ISREG(st.st_mode)) {
+ load_1(ms, action, subfn, &errs,
+ &marray, &marraycount);
+ }
+ }
+ closedir(dir);
+ } else
+ errs++;
+ } else
+ load_1(ms, action, fn, &errs, &marray, &marraycount);
+ if (errs)
+ goto out;
+
+ /* Set types of tests */
+ for (i = 0; i < marraycount; ) {
+ if (marray[i].mp->cont_level != 0) {
+ i++;
+ continue;
+ }
+
+ starttest = i;
+ do {
+ set_test_type(marray[starttest].mp, marray[i].mp);
+ if (ms->flags & MAGIC_DEBUG) {
+ (void)fprintf(stderr, "%s%s%s: %s\n",
+ marray[i].mp->mimetype,
+ marray[i].mp->mimetype[0] == '\0' ? "" : "; ",
+ marray[i].mp->desc[0] ? marray[i].mp->desc : "(no description)",
+ marray[i].mp->flag & BINTEST ? "binary" : "text");
+ if (marray[i].mp->flag & BINTEST) {
+#define SYMBOL "text"
+#define SYMLEN sizeof(SYMBOL)
+ char *p = strstr(marray[i].mp->desc, "text");
+ if (p && (p == marray[i].mp->desc || isspace(p[-1])) &&
+ (p + SYMLEN - marray[i].mp->desc == MAXstring ||
+ (p[SYMLEN] == '\0' || isspace(p[SYMLEN])))) {
+ (void)fprintf(stderr,
+ "*** Possible binary test for text type\n");
+ }
+#undef SYMBOL
+#undef SYMLEN
+ }
+ }
+ } while (++i < marraycount && marray[i].mp->cont_level != 0);
+ }
+
+ qsort(marray, marraycount, sizeof(*marray), apprentice_sort);
+
+ /*
+ * Make sure that any level 0 "default" line is last (if one exists).
+ */
+ for (i = 0; i < marraycount; i++) {
+ if (marray[i].mp->cont_level == 0 &&
+ marray[i].mp->type == FILE_DEFAULT) {
+ while (++i < marraycount)
+ if (marray[i].mp->cont_level == 0)
+ break;
+ if (i != marraycount) {
+ ms->line = marray[i].mp->lineno; /* XXX - Ugh! */
+ file_magwarn(ms,
+ "level 0 \"default\" did not sort last");
+ }
+ break;
+ }
+ }
+
+ for (i = 0; i < marraycount; i++)
+ mentrycount += marray[i].cont_count;
+
+ if ((*magicp = malloc(sizeof(**magicp) * mentrycount)) == NULL) {
+ file_oomem(ms, sizeof(**magicp) * mentrycount);
+ errs++;
+ goto out;
+ }
+
+ mentrycount = 0;
+ for (i = 0; i < marraycount; i++) {
+ (void)memcpy(*magicp + mentrycount, marray[i].mp,
+ marray[i].cont_count * sizeof(**magicp));
+ mentrycount += marray[i].cont_count;
+ }
+out:
+ for (i = 0; i < marraycount; i++)
+ free(marray[i].mp);
+ free(marray);
+ if (errs) {
+ *magicp = NULL;
+ *nmagicp = 0;
+ return errs;
+ } else {
+ *nmagicp = mentrycount;
+ return 0;
+ }
+
+}
+
+/*
+ * extend the sign bit if the comparison is to be signed
+ */
+protected uint64_t
+file_signextend(struct magic_set *ms, struct magic *m, uint64_t v)
+{
+ if (!(m->flag & UNSIGNED)) {
+ switch(m->type) {
+ /*
+ * Do not remove the casts below. They are
+ * vital. When later compared with the data,
+ * the sign extension must have happened.
+ */
+ case FILE_BYTE:
+ v = (char) v;
+ break;
+ case FILE_SHORT:
+ case FILE_BESHORT:
+ case FILE_LESHORT:
+ v = (short) v;
+ break;
+ case FILE_DATE:
+ case FILE_BEDATE:
+ case FILE_LEDATE:
+ case FILE_MEDATE:
+ case FILE_LDATE:
+ case FILE_BELDATE:
+ case FILE_LELDATE:
+ case FILE_MELDATE:
+ case FILE_LONG:
+ case FILE_BELONG:
+ case FILE_LELONG:
+ case FILE_MELONG:
+ case FILE_FLOAT:
+ case FILE_BEFLOAT:
+ case FILE_LEFLOAT:
+ v = (int32_t) v;
+ break;
+ case FILE_QUAD:
+ case FILE_BEQUAD:
+ case FILE_LEQUAD:
+ case FILE_QDATE:
+ case FILE_QLDATE:
+ case FILE_BEQDATE:
+ case FILE_BEQLDATE:
+ case FILE_LEQDATE:
+ case FILE_LEQLDATE:
+ case FILE_DOUBLE:
+ case FILE_BEDOUBLE:
+ case FILE_LEDOUBLE:
+ v = (int64_t) v;
+ break;
+ case FILE_STRING:
+ case FILE_PSTRING:
+ case FILE_BESTRING16:
+ case FILE_LESTRING16:
+ case FILE_REGEX:
+ case FILE_SEARCH:
+ case FILE_DEFAULT:
+ break;
+ default:
+ if (ms->flags & MAGIC_CHECK)
+ file_magwarn(ms, "cannot happen: m->type=%d\n",
+ m->type);
+ return ~0U;
+ }
+ }
+ return v;
+}
+
+private int
+string_modifier_check(struct magic_set *ms, struct magic *m)
+{
+ if ((ms->flags & MAGIC_CHECK) == 0)
+ return 0;
+
+ switch (m->type) {
+ case FILE_BESTRING16:
+ case FILE_LESTRING16:
+ if (m->str_flags != 0) {
+ file_magwarn(ms,
+ "no modifiers allowed for 16-bit strings\n");
+ return -1;
+ }
+ break;
+ case FILE_STRING:
+ case FILE_PSTRING:
+ if ((m->str_flags & REGEX_OFFSET_START) != 0) {
+ file_magwarn(ms,
+ "'/%c' only allowed on regex and search\n",
+ CHAR_REGEX_OFFSET_START);
+ return -1;
+ }
+ break;
+ case FILE_SEARCH:
+ if (m->str_range == 0) {
+ file_magwarn(ms,
+ "missing range; defaulting to %d\n",
+ STRING_DEFAULT_RANGE);
+ m->str_range = STRING_DEFAULT_RANGE;
+ return -1;
+ }
+ break;
+ case FILE_REGEX:
+ if ((m->str_flags & STRING_COMPACT_BLANK) != 0) {
+ file_magwarn(ms, "'/%c' not allowed on regex\n",
+ CHAR_COMPACT_BLANK);
+ return -1;
+ }
+ if ((m->str_flags & STRING_COMPACT_OPTIONAL_BLANK) != 0) {
+ file_magwarn(ms, "'/%c' not allowed on regex\n",
+ CHAR_COMPACT_OPTIONAL_BLANK);
+ return -1;
+ }
+ break;
+ default:
+ file_magwarn(ms, "coding error: m->type=%d\n",
+ m->type);
+ return -1;
+ }
+ return 0;
+}
+
+private int
+get_op(char c)
+{
+ switch (c) {
+ case '&':
+ return FILE_OPAND;
+ case '|':
+ return FILE_OPOR;
+ case '^':
+ return FILE_OPXOR;
+ case '+':
+ return FILE_OPADD;
+ case '-':
+ return FILE_OPMINUS;
+ case '*':
+ return FILE_OPMULTIPLY;
+ case '/':
+ return FILE_OPDIVIDE;
+ case '%':
+ return FILE_OPMODULO;
+ default:
+ return -1;
+ }
+}
+
+#ifdef ENABLE_CONDITIONALS
+private int
+get_cond(const char *l, const char **t)
+{
+ static const struct cond_tbl_s {
+ char name[8];
+ size_t len;
+ int cond;
+ } cond_tbl[] = {
+ { "if", 2, COND_IF },
+ { "elif", 4, COND_ELIF },
+ { "else", 4, COND_ELSE },
+ { "", 0, COND_NONE },
+ };
+ const struct cond_tbl_s *p;
+
+ for (p = cond_tbl; p->len; p++) {
+ if (strncmp(l, p->name, p->len) == 0 &&
+ isspace((unsigned char)l[p->len])) {
+ if (t)
+ *t = l + p->len;
+ break;
+ }
+ }
+ return p->cond;
+}
+
+private int
+check_cond(struct magic_set *ms, int cond, uint32_t cont_level)
+{
+ int last_cond;
+ last_cond = ms->c.li[cont_level].last_cond;
+
+ switch (cond) {
+ case COND_IF:
+ if (last_cond != COND_NONE && last_cond != COND_ELIF) {
+ if (ms->flags & MAGIC_CHECK)
+ file_magwarn(ms, "syntax error: `if'");
+ return -1;
+ }
+ last_cond = COND_IF;
+ break;
+
+ case COND_ELIF:
+ if (last_cond != COND_IF && last_cond != COND_ELIF) {
+ if (ms->flags & MAGIC_CHECK)
+ file_magwarn(ms, "syntax error: `elif'");
+ return -1;
+ }
+ last_cond = COND_ELIF;
+ break;
+
+ case COND_ELSE:
+ if (last_cond != COND_IF && last_cond != COND_ELIF) {
+ if (ms->flags & MAGIC_CHECK)
+ file_magwarn(ms, "syntax error: `else'");
+ return -1;
+ }
+ last_cond = COND_NONE;
+ break;
+
+ case COND_NONE:
+ last_cond = COND_NONE;
+ break;
+ }
+
+ ms->c.li[cont_level].last_cond = last_cond;
+ return 0;
+}
+#endif /* ENABLE_CONDITIONALS */
+
+/*
+ * parse one line from magic file, put into magic[index++] if valid
+ */
+private int
+parse(struct magic_set *ms, struct magic_entry **mentryp, uint32_t *nmentryp,
+ const char *line, size_t lineno, int action)
+{
+#ifdef ENABLE_CONDITIONALS
+ static uint32_t last_cont_level = 0;
+#endif
+ size_t i;
+ struct magic_entry *me;
+ struct magic *m;
+ const char *l = line;
+ char *t;
+ int op;
+ uint32_t cont_level;
+
+ cont_level = 0;
+
+ while (*l == '>') {
+ ++l; /* step over */
+ cont_level++;
+ }
+#ifdef ENABLE_CONDITIONALS
+ if (cont_level == 0 || cont_level > last_cont_level)
+ if (file_check_mem(ms, cont_level) == -1)
+ return -1;
+ last_cont_level = cont_level;
+#endif
+
+#define ALLOC_CHUNK (size_t)10
+#define ALLOC_INCR (size_t)200
+
+ if (cont_level != 0) {
+ if (*nmentryp == 0) {
+ file_error(ms, 0, "No current entry for continuation");
+ return -1;
+ }
+ me = &(*mentryp)[*nmentryp - 1];
+ if (me->cont_count == me->max_count) {
+ struct magic *nm;
+ size_t cnt = me->max_count + ALLOC_CHUNK;
+ if ((nm = realloc(me->mp, sizeof(*nm) * cnt)) == NULL) {
+ file_oomem(ms, sizeof(*nm) * cnt);
+ return -1;
+ }
+ me->mp = m = nm;
+ me->max_count = cnt;
+ }
+ m = &me->mp[me->cont_count++];
+ (void)memset(m, 0, sizeof(*m));
+ m->cont_level = cont_level;
+ } else {
+ if (*nmentryp == maxmagic) {
+ struct magic_entry *mp;
+
+ maxmagic += ALLOC_INCR;
+ if ((mp = realloc(*mentryp, sizeof(*mp) * maxmagic)) ==
+ NULL) {
+ file_oomem(ms, sizeof(*mp) * maxmagic);
+ return -1;
+ }
+ (void)memset(&mp[*nmentryp], 0, sizeof(*mp) *
+ ALLOC_INCR);
+ *mentryp = mp;
+ }
+ me = &(*mentryp)[*nmentryp];
+ if (me->mp == NULL) {
+ if ((m = malloc(sizeof(*m) * ALLOC_CHUNK)) == NULL) {
+ file_oomem(ms, sizeof(*m) * ALLOC_CHUNK);
+ return -1;
+ }
+ me->mp = m;
+ me->max_count = ALLOC_CHUNK;
+ } else
+ m = me->mp;
+ (void)memset(m, 0, sizeof(*m));
+ m->cont_level = 0;
+ me->cont_count = 1;
+ }
+ m->lineno = lineno;
+
+ if (*l == '&') { /* m->cont_level == 0 checked below. */
+ ++l; /* step over */
+ m->flag |= OFFADD;
+ }
+ if (*l == '(') {
+ ++l; /* step over */
+ m->flag |= INDIR;
+ if (m->flag & OFFADD)
+ m->flag = (m->flag & ~OFFADD) | INDIROFFADD;
+
+ if (*l == '&') { /* m->cont_level == 0 checked below */
+ ++l; /* step over */
+ m->flag |= OFFADD;
+ }
+ }
+ /* Indirect offsets are not valid at level 0. */
+ if (m->cont_level == 0 && (m->flag & (OFFADD | INDIROFFADD)))
+ if (ms->flags & MAGIC_CHECK)
+ file_magwarn(ms, "relative offset at level 0");
+
+ /* get offset, then skip over it */
+ m->offset = (uint32_t)strtoul(l, &t, 0);
+ if (l == t)
+ if (ms->flags & MAGIC_CHECK)
+ file_magwarn(ms, "offset `%s' invalid", l);
+ l = t;
+
+ if (m->flag & INDIR) {
+ m->in_type = FILE_LONG;
+ m->in_offset = 0;
+ /*
+ * read [.lbs][+-]nnnnn)
+ */
+ if (*l == '.') {
+ l++;
+ switch (*l) {
+ case 'l':
+ m->in_type = FILE_LELONG;
+ break;
+ case 'L':
+ m->in_type = FILE_BELONG;
+ break;
+ case 'm':
+ m->in_type = FILE_MELONG;
+ break;
+ case 'h':
+ case 's':
+ m->in_type = FILE_LESHORT;
+ break;
+ case 'H':
+ case 'S':
+ m->in_type = FILE_BESHORT;
+ break;
+ case 'c':
+ case 'b':
+ case 'C':
+ case 'B':
+ m->in_type = FILE_BYTE;
+ break;
+ case 'e':
+ case 'f':
+ case 'g':
+ m->in_type = FILE_LEDOUBLE;
+ break;
+ case 'E':
+ case 'F':
+ case 'G':
+ m->in_type = FILE_BEDOUBLE;
+ break;
+ default:
+ if (ms->flags & MAGIC_CHECK)
+ file_magwarn(ms,
+ "indirect offset type `%c' invalid",
+ *l);
+ break;
+ }
+ l++;
+ }
+
+ m->in_op = 0;
+ if (*l == '~') {
+ m->in_op |= FILE_OPINVERSE;
+ l++;
+ }
+ if ((op = get_op(*l)) != -1) {
+ m->in_op |= op;
+ l++;
+ }
+ if (*l == '(') {
+ m->in_op |= FILE_OPINDIRECT;
+ l++;
+ }
+ if (isdigit((unsigned char)*l) || *l == '-') {
+ m->in_offset = (int32_t)strtol(l, &t, 0);
+ if (l == t)
+ if (ms->flags & MAGIC_CHECK)
+ file_magwarn(ms,
+ "in_offset `%s' invalid", l);
+ l = t;
+ }
+ if (*l++ != ')' ||
+ ((m->in_op & FILE_OPINDIRECT) && *l++ != ')'))
+ if (ms->flags & MAGIC_CHECK)
+ file_magwarn(ms,
+ "missing ')' in indirect offset");
+ }
+ EATAB;
+
+#ifdef ENABLE_CONDITIONALS
+ m->cond = get_cond(l, &l);
+ if (check_cond(ms, m->cond, cont_level) == -1)
+ return -1;
+
+ EATAB;
+#endif
+
+ if (*l == 'u') {
+ ++l;
+ m->flag |= UNSIGNED;
+ }
+
+ m->type = get_type(l, &l);
+ if (m->type == FILE_INVALID) {
+ if (ms->flags & MAGIC_CHECK)
+ file_magwarn(ms, "type `%s' invalid", l);
+ return -1;
+ }
+
+ /* New-style anding: "0 byte&0x80 =0x80 dynamically linked" */
+ /* New and improved: ~ & | ^ + - * / % -- exciting, isn't it? */
+
+ m->mask_op = 0;
+ if (*l == '~') {
+ if (!IS_STRING(m->type))
+ m->mask_op |= FILE_OPINVERSE;
+ else if (ms->flags & MAGIC_CHECK)
+ file_magwarn(ms, "'~' invalid for string types");
+ ++l;
+ }
+ m->str_range = 0;
+ m->str_flags = 0;
+ m->num_mask = 0;
+ if ((op = get_op(*l)) != -1) {
+ if (!IS_STRING(m->type)) {
+ uint64_t val;
+ ++l;
+ m->mask_op |= op;
+ val = (uint64_t)strtoull(l, &t, 0);
+ l = t;
+ m->num_mask = file_signextend(ms, m, val);
+ eatsize(&l);
+ }
+ else if (op == FILE_OPDIVIDE) {
+ int have_range = 0;
+ while (!isspace((unsigned char)*++l)) {
+ switch (*l) {
+ case '0': case '1': case '2':
+ case '3': case '4': case '5':
+ case '6': case '7': case '8':
+ case '9':
+ if (have_range &&
+ (ms->flags & MAGIC_CHECK))
+ file_magwarn(ms,
+ "multiple ranges");
+ have_range = 1;
+ m->str_range = strtoul(l, &t, 0);
+ if (m->str_range == 0)
+ file_magwarn(ms,
+ "zero range");
+ l = t - 1;
+ break;
+ case CHAR_COMPACT_BLANK:
+ m->str_flags |= STRING_COMPACT_BLANK;
+ break;
+ case CHAR_COMPACT_OPTIONAL_BLANK:
+ m->str_flags |=
+ STRING_COMPACT_OPTIONAL_BLANK;
+ break;
+ case CHAR_IGNORE_LOWERCASE:
+ m->str_flags |= STRING_IGNORE_LOWERCASE;
+ break;
+ case CHAR_IGNORE_UPPERCASE:
+ m->str_flags |= STRING_IGNORE_UPPERCASE;
+ break;
+ case CHAR_REGEX_OFFSET_START:
+ m->str_flags |= REGEX_OFFSET_START;
+ break;
+ default:
+ if (ms->flags & MAGIC_CHECK)
+ file_magwarn(ms,
+ "string extension `%c' invalid",
+ *l);
+ return -1;
+ }
+ /* allow multiple '/' for readability */
+ if (l[1] == '/' &&
+ !isspace((unsigned char)l[2]))
+ l++;
+ }
+ if (string_modifier_check(ms, m) == -1)
+ return -1;
+ }
+ else {
+ if (ms->flags & MAGIC_CHECK)
+ file_magwarn(ms, "invalid string op: %c", *t);
+ return -1;
+ }
+ }
+ /*
+ * We used to set mask to all 1's here, instead let's just not do
+ * anything if mask = 0 (unless you have a better idea)
+ */
+ EATAB;
+
+ switch (*l) {
+ case '>':
+ case '<':
+ /* Old-style anding: "0 byte &0x80 dynamically linked" */
+ case '&':
+ case '^':
+ case '=':
+ m->reln = *l;
+ ++l;
+ if (*l == '=') {
+ /* HP compat: ignore &= etc. */
+ ++l;
+ }
+ break;
+ case '!':
+ m->reln = *l;
+ ++l;
+ break;
+ default:
+ m->reln = '='; /* the default relation */
+ if (*l == 'x' && ((isascii((unsigned char)l[1]) &&
+ isspace((unsigned char)l[1])) || !l[1])) {
+ m->reln = *l;
+ ++l;
+ }
+ break;
+ }
+ /*
+ * Grab the value part, except for an 'x' reln.
+ */
+ if (m->reln != 'x' && getvalue(ms, m, &l, action))
+ return -1;
+
+ /*
+ * TODO finish this macro and start using it!
+ * #define offsetcheck {if (offset > HOWMANY-1)
+ * magwarn("offset too big"); }
+ */
+
+ /*
+ * Now get last part - the description
+ */
+ EATAB;
+ if (l[0] == '\b') {
+ ++l;
+ m->flag |= NOSPACE;
+ } else if ((l[0] == '\\') && (l[1] == 'b')) {
+ ++l;
+ ++l;
+ m->flag |= NOSPACE;
+ }
+ for (i = 0; (m->desc[i++] = *l++) != '\0' && i < sizeof(m->desc); )
+ continue;
+ if (i == sizeof(m->desc)) {
+ m->desc[sizeof(m->desc) - 1] = '\0';
+ if (ms->flags & MAGIC_CHECK)
+ file_magwarn(ms, "description `%s' truncated", m->desc);
+ }
+
+ /*
+ * We only do this check while compiling, or if any of the magic
+ * files were not compiled.
+ */
+ if (ms->flags & MAGIC_CHECK) {
+ if (check_format(ms, m) == -1)
+ return -1;
+ }
+#ifndef COMPILE_ONLY
+ if (action == FILE_CHECK) {
+ file_mdump(m);
+ }
+#endif
+ m->mimetype[0] = '\0'; /* initialise MIME type to none */
+ if (m->cont_level == 0)
+ ++(*nmentryp); /* make room for next */
+ return 0;
+}
+
+/*
+ * parse a MIME annotation line from magic file, put into magic[index - 1]
+ * if valid
+ */
+private int
+parse_mime(struct magic_set *ms, struct magic_entry **mentryp,
+ uint32_t *nmentryp, const char *line)
+{
+ size_t i;
+ const char *l = line;
+ struct magic *m;
+ struct magic_entry *me;
+
+ if (*nmentryp == 0) {
+ file_error(ms, 0, "No current entry for MIME type");
+ return -1;
+ }
+
+ me = &(*mentryp)[*nmentryp - 1];
+ m = &me->mp[me->cont_count == 0 ? 0 : me->cont_count - 1];
+
+ if (m->mimetype[0] != '\0') {
+ file_error(ms, 0, "Current entry already has a MIME type: %s\n"
+ "Description: %s\nNew type: %s", m->mimetype, m->desc, l);
+ return -1;
+ }
+
+ EATAB;
+ for (i = 0;
+ *l && ((isascii((unsigned char)*l) && isalnum((unsigned char)*l))
+ || strchr("-+/.", *l)) && i < sizeof(m->mimetype);
+ m->mimetype[i++] = *l++)
+ continue;
+ if (i == sizeof(m->mimetype)) {
+ m->desc[sizeof(m->mimetype) - 1] = '\0';
+ if (ms->flags & MAGIC_CHECK)
+ file_magwarn(ms, "MIME type `%s' truncated %zu",
+ m->mimetype, i);
+ } else
+ m->mimetype[i] = '\0';
+
+ if (i > 0)
+ return 0;
+ else
+ return -1;
+}
+
+private int
+check_format_type(const char *ptr, int type)
+{
+ int quad = 0;
+ if (*ptr == '\0') {
+ /* Missing format string; bad */
+ return -1;
+ }
+
+ switch (type) {
+ case FILE_FMT_QUAD:
+ quad = 1;
+ /*FALLTHROUGH*/
+ case FILE_FMT_NUM:
+ if (*ptr == '-')
+ ptr++;
+ if (*ptr == '.')
+ ptr++;
+ while (isdigit((unsigned char)*ptr)) ptr++;
+ if (*ptr == '.')
+ ptr++;
+ while (isdigit((unsigned char)*ptr)) ptr++;
+ if (quad) {
+ if (*ptr++ != 'l')
+ return -1;
+ if (*ptr++ != 'l')
+ return -1;
+ }
+
+ switch (*ptr++) {
+ case 'l':
+ switch (*ptr++) {
+ case 'i':
+ case 'd':
+ case 'u':
+ case 'x':
+ case 'X':
+ return 0;
+ default:
+ return -1;
+ }
+
+ case 'h':
+ switch (*ptr++) {
+ case 'h':
+ switch (*ptr++) {
+ case 'i':
+ case 'd':
+ case 'u':
+ case 'x':
+ case 'X':
+ return 0;
+ default:
+ return -1;
+ }
+ case 'd':
+ return 0;
+ default:
+ return -1;
+ }
+
+ case 'i':
+ case 'c':
+ case 'd':
+ case 'u':
+ case 'x':
+ case 'X':
+ return 0;
+
+ default:
+ return -1;
+ }
+
+ case FILE_FMT_FLOAT:
+ case FILE_FMT_DOUBLE:
+ if (*ptr == '-')
+ ptr++;
+ if (*ptr == '.')
+ ptr++;
+ while (isdigit((unsigned char)*ptr)) ptr++;
+ if (*ptr == '.')
+ ptr++;
+ while (isdigit((unsigned char)*ptr)) ptr++;
+
+ switch (*ptr++) {
+ case 'e':
+ case 'E':
+ case 'f':
+ case 'F':
+ case 'g':
+ case 'G':
+ return 0;
+
+ default:
+ return -1;
+ }
+
+
+ case FILE_FMT_STR:
+ if (*ptr == '-')
+ ptr++;
+ while (isdigit((unsigned char )*ptr))
+ ptr++;
+ if (*ptr == '.') {
+ ptr++;
+ while (isdigit((unsigned char )*ptr))
+ ptr++;
+ }
+
+ switch (*ptr++) {
+ case 's':
+ return 0;
+ default:
+ return -1;
+ }
+
+ default:
+ /* internal error */
+ abort();
+ }
+ /*NOTREACHED*/
+ return -1;
+}
+
+/*
+ * Check that the optional printf format in description matches
+ * the type of the magic.
+ */
+private int
+check_format(struct magic_set *ms, struct magic *m)
+{
+ char *ptr;
+
+ for (ptr = m->desc; *ptr; ptr++)
+ if (*ptr == '%')
+ break;
+ if (*ptr == '\0') {
+ /* No format string; ok */
+ return 1;
+ }
+
+ assert(file_nformats == file_nnames);
+
+ if (m->type >= file_nformats) {
+ file_magwarn(ms, "Internal error inconsistency between "
+ "m->type and format strings");
+ return -1;
+ }
+ if (file_formats[m->type] == FILE_FMT_NONE) {
+ file_magwarn(ms, "No format string for `%s' with description "
+ "`%s'", m->desc, file_names[m->type]);
+ return -1;
+ }
+
+ ptr++;
+ if (check_format_type(ptr, file_formats[m->type]) == -1) {
+ /*
+ * TODO: this error message is unhelpful if the format
+ * string is not one character long
+ */
+ file_magwarn(ms, "Printf format `%c' is not valid for type "
+ "`%s' in description `%s'", *ptr,
+ file_names[m->type], m->desc);
+ return -1;
+ }
+
+ for (; *ptr; ptr++) {
+ if (*ptr == '%') {
+ file_magwarn(ms,
+ "Too many format strings (should have at most one) "
+ "for `%s' with description `%s'",
+ file_names[m->type], m->desc);
+ return -1;
+ }
+ }
+ return 0;
+}
+
+/*
+ * Read a numeric value from a pointer, into the value union of a magic
+ * pointer, according to the magic type. Update the string pointer to point
+ * just after the number read. Return 0 for success, non-zero for failure.
+ */
+private int
+getvalue(struct magic_set *ms, struct magic *m, const char **p, int action)
+{
+ int slen;
+
+ switch (m->type) {
+ case FILE_BESTRING16:
+ case FILE_LESTRING16:
+ case FILE_STRING:
+ case FILE_PSTRING:
+ case FILE_REGEX:
+ case FILE_SEARCH:
+ *p = getstr(ms, *p, m->value.s, sizeof(m->value.s), &slen, action);
+ if (*p == NULL) {
+ if (ms->flags & MAGIC_CHECK)
+ file_magwarn(ms, "cannot get string from `%s'",
+ m->value.s);
+ return -1;
+ }
+ m->vallen = slen;
+ if (m->type == FILE_PSTRING)
+ m->vallen++;
+ return 0;
+ case FILE_FLOAT:
+ case FILE_BEFLOAT:
+ case FILE_LEFLOAT:
+ if (m->reln != 'x') {
+ char *ep;
+#ifdef HAVE_STRTOF
+ m->value.f = strtof(*p, &ep);
+#else
+ m->value.f = (float)strtod(*p, &ep);
+#endif
+ *p = ep;
+ }
+ return 0;
+ case FILE_DOUBLE:
+ case FILE_BEDOUBLE:
+ case FILE_LEDOUBLE:
+ if (m->reln != 'x') {
+ char *ep;
+ m->value.d = strtod(*p, &ep);
+ *p = ep;
+ }
+ return 0;
+ default:
+ if (m->reln != 'x') {
+ char *ep;
+ m->value.q = file_signextend(ms, m,
+ (uint64_t)strtoull(*p, &ep, 0));
+ *p = ep;
+ eatsize(p);
+ }
+ return 0;
+ }
+}
+
+/*
+ * Convert a string containing C character escapes. Stop at an unescaped
+ * space or tab.
+ * Copy the converted version to "p", returning its length in *slen.
+ * Return updated scan pointer as function result.
+ */
+private const char *
+getstr(struct magic_set *ms, const char *s, char *p, int plen, int *slen, int action)
+{
+ const char *origs = s;
+ char *origp = p;
+ char *pmax = p + plen - 1;
+ int c;
+ int val;
+
+ while ((c = *s++) != '\0') {
+ if (isspace((unsigned char) c))
+ break;
+ if (p >= pmax) {
+ file_error(ms, 0, "string too long: `%s'", origs);
+ return NULL;
+ }
+ if (c == '\\') {
+ switch(c = *s++) {
+
+ case '\0':
+ if (action == FILE_COMPILE)
+ file_magwarn(ms, "incomplete escape");
+ goto out;
+
+ case '\t':
+ if (action == FILE_COMPILE) {
+ file_magwarn(ms,
+ "escaped tab found, use \\t instead");
+ action++;
+ }
+ /*FALLTHROUGH*/
+ default:
+ if (action == FILE_COMPILE) {
+ if (isprint((unsigned char)c))
+ file_magwarn(ms,
+ "no need to escape `%c'", c);
+ else
+ file_magwarn(ms,
+ "unknown escape sequence: \\%03o", c);
+ }
+ /*FALLTHROUGH*/
+ /* space, perhaps force people to use \040? */
+ case ' ':
+#if 0
+ /*
+ * Other things people escape, but shouldn't need to,
+ * so we disallow them
+ */
+ case '\'':
+ case '"':
+ case '?':
+#endif
+ /* Relations */
+ case '>':
+ case '<':
+ case '&':
+ case '^':
+ case '=':
+ case '!':
+ /* and baskslash itself */
+ case '\\':
+ *p++ = (char) c;
+ break;
+
+ case 'a':
+ *p++ = '\a';
+ break;
+
+ case 'b':
+ *p++ = '\b';
+ break;
+
+ case 'f':
+ *p++ = '\f';
+ break;
+
+ case 'n':
+ *p++ = '\n';
+ break;
+
+ case 'r':
+ *p++ = '\r';
+ break;
+
+ case 't':
+ *p++ = '\t';
+ break;
+
+ case 'v':
+ *p++ = '\v';
+ break;
+
+ /* \ and up to 3 octal digits */
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ val = c - '0';
+ c = *s++; /* try for 2 */
+ if (c >= '0' && c <= '7') {
+ val = (val << 3) | (c - '0');
+ c = *s++; /* try for 3 */
+ if (c >= '0' && c <= '7')
+ val = (val << 3) | (c-'0');
+ else
+ --s;
+ }
+ else
+ --s;
+ *p++ = (char)val;
+ break;
+
+ /* \x and up to 2 hex digits */
+ case 'x':
+ val = 'x'; /* Default if no digits */
+ c = hextoint(*s++); /* Get next char */
+ if (c >= 0) {
+ val = c;
+ c = hextoint(*s++);
+ if (c >= 0)
+ val = (val << 4) + c;
+ else
+ --s;
+ } else
+ --s;
+ *p++ = (char)val;
+ break;
+ }
+ } else
+ *p++ = (char)c;
+ }
+out:
+ *p = '\0';
+ *slen = p - origp;
+ return s;
+}
+
+
+/* Single hex char to int; -1 if not a hex char. */
+private int
+hextoint(int c)
+{
+ if (!isascii((unsigned char) c))
+ return -1;
+ if (isdigit((unsigned char) c))
+ return c - '0';
+ if ((c >= 'a') && (c <= 'f'))
+ return c + 10 - 'a';
+ if (( c>= 'A') && (c <= 'F'))
+ return c + 10 - 'A';
+ return -1;
+}
+
+
+/*
+ * Print a string containing C character escapes.
+ */
+protected void
+file_showstr(FILE *fp, const char *s, size_t len)
+{
+ char c;
+
+ for (;;) {
+ c = *s++;
+ if (len == ~0U) {
+ if (c == '\0')
+ break;
+ }
+ else {
+ if (len-- == 0)
+ break;
+ }
+ if (c >= 040 && c <= 0176) /* TODO isprint && !iscntrl */
+ (void) fputc(c, fp);
+ else {
+ (void) fputc('\\', fp);
+ switch (c) {
+ case '\a':
+ (void) fputc('a', fp);
+ break;
+
+ case '\b':
+ (void) fputc('b', fp);
+ break;
+
+ case '\f':
+ (void) fputc('f', fp);
+ break;
+
+ case '\n':
+ (void) fputc('n', fp);
+ break;
+
+ case '\r':
+ (void) fputc('r', fp);
+ break;
+
+ case '\t':
+ (void) fputc('t', fp);
+ break;
+
+ case '\v':
+ (void) fputc('v', fp);
+ break;
+
+ default:
+ (void) fprintf(fp, "%.3o", c & 0377);
+ break;
+ }
+ }
+ }
+}
+
+/*
+ * eatsize(): Eat the size spec from a number [eg. 10UL]
+ */
+private void
+eatsize(const char **p)
+{
+ const char *l = *p;
+
+ if (LOWCASE(*l) == 'u')
+ l++;
+
+ switch (LOWCASE(*l)) {
+ case 'l': /* long */
+ case 's': /* short */
+ case 'h': /* short */
+ case 'b': /* char/byte */
+ case 'c': /* char/byte */
+ l++;
+ /*FALLTHROUGH*/
+ default:
+ break;
+ }
+
+ *p = l;
+}
+
+/*
+ * handle a compiled file.
+ */
+private int
+apprentice_map(struct magic_set *ms, struct magic **magicp, uint32_t *nmagicp,
+ const char *fn)
+{
+ int fd;
+ struct stat st;
+ uint32_t *ptr;
+ uint32_t version;
+ int needsbyteswap;
+ char *dbname = NULL;
+ void *mm = NULL;
+ int ret = 0;
+
+#ifdef PHP_BUNDLE
+ if (fn == NULL) {
+ mm = &php_magic_database;
+ ret = 3;
+ goto internal_loaded;
+ }
+#endif
+
+ mkdbname(fn, &dbname, 0);
+ if (dbname == NULL)
+ goto error2;
+
+ if ((fd = open(dbname, O_RDONLY|O_BINARY)) == -1)
+ goto error2;
+
+ if (fstat(fd, &st) == -1) {
+ file_error(ms, errno, "cannot stat `%s'", dbname);
+ goto error1;
+ }
+ if (st.st_size < 8) {
+ file_error(ms, 0, "file `%s' is too small", dbname);
+ goto error1;
+ }
+
+#ifdef QUICK
+ if ((mm = mmap(0, (size_t)st.st_size, PROT_READ|PROT_WRITE,
+ MAP_PRIVATE|MAP_FILE, fd, (off_t)0)) == MAP_FAILED) {
+ file_error(ms, errno, "cannot map `%s'", dbname);
+ goto error1;
+ }
+ ret = 2;
+#else
+ if ((mm = malloc((size_t)st.st_size)) == NULL) {
+ file_oomem(ms, (size_t)st.st_size);
+ goto error1;
+ }
+ if (read(fd, mm, (size_t)st.st_size) != (size_t)st.st_size) {
+ file_badread(ms);
+ goto error1;
+ }
+ ret = 1;
+#endif
+ (void)close(fd);
+ fd = -1;
+#ifdef PHP_BUNDLE
+internal_loaded:
+#endif
+ *magicp = mm;
+ ptr = (uint32_t *)(void *)*magicp;
+ if (*ptr != MAGICNO) {
+ if (swap4(*ptr) != MAGICNO) {
+ file_error(ms, 0, "bad magic in `%s'");
+ goto error1;
+ }
+ needsbyteswap = 1;
+ } else
+ needsbyteswap = 0;
+ if (needsbyteswap)
+ version = swap4(ptr[1]);
+ else
+ version = ptr[1];
+ if (version != VERSIONNO) {
+ file_error(ms, 0, "File %d.%d supports only %d version magic "
+ "files. `%s' is version %d", FILE_VERSION_MAJOR, patchlevel,
+ VERSIONNO, dbname, version);
+ goto error1;
+ }
+#ifdef PHP_BUNDLE
+ if (fn == NULL)
+ *nmagicp = (sizeof(php_magic_database) / sizeof(struct magic));
+ else /* the statement after the #endif is used */
+#endif
+ *nmagicp = (uint32_t)(st.st_size / sizeof(struct magic));
+ if (*nmagicp > 0)
+ (*nmagicp)--;
+ (*magicp)++;
+ if (needsbyteswap)
+ byteswap(*magicp, *nmagicp);
+ free(dbname);
+ return ret;
+
+error1:
+ if (fd != -1)
+ (void)close(fd);
+ if (mm) {
+#ifdef QUICK
+ (void)munmap((void *)mm, (size_t)st.st_size);
+#else
+ free(mm);
+#endif
+ } else {
+ *magicp = NULL;
+ *nmagicp = 0;
+ }
+error2:
+ free(dbname);
+ return -1;
+}
+
+private const uint32_t ar[] = {
+ MAGICNO, VERSIONNO
+};
+/*
+ * handle an mmaped file.
+ */
+private int
+apprentice_compile(struct magic_set *ms, struct magic **magicp,
+ uint32_t *nmagicp, const char *fn)
+{
+ int fd;
+ char *dbname;
+ int rv = -1;
+
+ mkdbname(fn, &dbname, 1);
+
+ if (dbname == NULL)
+ goto out;
+
+ if ((fd = open(dbname, O_WRONLY|O_CREAT|O_TRUNC|O_BINARY, 0644)) == -1) {
+ file_error(ms, errno, "cannot open `%s'", dbname);
+ goto out;
+ }
+
+ if (write(fd, ar, sizeof(ar)) != (ssize_t)sizeof(ar)) {
+ file_error(ms, errno, "error writing `%s'", dbname);
+ goto out;
+ }
+
+ if (lseek(fd, (off_t)sizeof(struct magic), SEEK_SET)
+ != sizeof(struct magic)) {
+ file_error(ms, errno, "error seeking `%s'", dbname);
+ goto out;
+ }
+
+ if (write(fd, *magicp, (sizeof(struct magic) * *nmagicp))
+ != (ssize_t)(sizeof(struct magic) * *nmagicp)) {
+ file_error(ms, errno, "error writing `%s'", dbname);
+ goto out;
+ }
+
+ (void)close(fd);
+ rv = 0;
+out:
+ free(dbname);
+ return rv;
+}
+
+private const char ext[] = ".mgc";
+/*
+ * make a dbname
+ */
+private void
+mkdbname(const char *fn, char **buf, int strip)
+{
+ if (strip) {
+ const char *p;
+ if ((p = strrchr(fn, '/')) != NULL)
+ fn = ++p;
+ }
+
+ (void)asprintf(buf, "%s%s", fn, ext);
+ if (*buf && strlen(*buf) > MAXPATHLEN) {
+ free(*buf);
+ *buf = NULL;
+ }
+}
+
+/*
+ * Byteswap an mmap'ed file if needed
+ */
+private void
+byteswap(struct magic *magic, uint32_t nmagic)
+{
+ uint32_t i;
+ for (i = 0; i < nmagic; i++)
+ bs1(&magic[i]);
+}
+
+/*
+ * swap a short
+ */
+private uint16_t
+swap2(uint16_t sv)
+{
+ uint16_t rv;
+ uint8_t *s = (uint8_t *)(void *)&sv;
+ uint8_t *d = (uint8_t *)(void *)&rv;
+ d[0] = s[1];
+ d[1] = s[0];
+ return rv;
+}
+
+/*
+ * swap an int
+ */
+private uint32_t
+swap4(uint32_t sv)
+{
+ uint32_t rv;
+ uint8_t *s = (uint8_t *)(void *)&sv;
+ uint8_t *d = (uint8_t *)(void *)&rv;
+ d[0] = s[3];
+ d[1] = s[2];
+ d[2] = s[1];
+ d[3] = s[0];
+ return rv;
+}
+
+/*
+ * swap a quad
+ */
+private uint64_t
+swap8(uint64_t sv)
+{
+ uint32_t rv;
+ uint8_t *s = (uint8_t *)(void *)&sv;
+ uint8_t *d = (uint8_t *)(void *)&rv;
+#if 0
+ d[0] = s[3];
+ d[1] = s[2];
+ d[2] = s[1];
+ d[3] = s[0];
+ d[4] = s[7];
+ d[5] = s[6];
+ d[6] = s[5];
+ d[7] = s[4];
+#else
+ d[0] = s[7];
+ d[1] = s[6];
+ d[2] = s[5];
+ d[3] = s[4];
+ d[4] = s[3];
+ d[5] = s[2];
+ d[6] = s[1];
+ d[7] = s[0];
+#endif
+ return rv;
+}
+
+/*
+ * byteswap a single magic entry
+ */
+private void
+bs1(struct magic *m)
+{
+ m->cont_level = swap2(m->cont_level);
+ m->offset = swap4((uint32_t)m->offset);
+ m->in_offset = swap4((uint32_t)m->in_offset);
+ m->lineno = swap4((uint32_t)m->lineno);
+ if (IS_STRING(m->type)) {
+ m->str_range = swap4(m->str_range);
+ m->str_flags = swap4(m->str_flags);
+ }
+ else {
+ m->value.q = swap8(m->value.q);
+ m->num_mask = swap8(m->num_mask);
+ }
+}
projects / php / commitdiff