Edit File: fsmagic.c
/* * 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. */ /* * fsmagic - magic based on filesystem info - directory, special files, etc. */ #include "file.h" #ifndef lint FILE_RCSID("@(#)$File: fsmagic.c,v 1.81 2019/07/16 13:30:32 christos Exp $") #endif /* lint */ #include "magic.h" #include <string.h> #ifdef HAVE_UNISTD_H #include <unistd.h> #endif #include <stdlib.h> /* Since major is a function on SVR4, we cannot use `ifndef major'. */ #ifdef MAJOR_IN_MKDEV # include <sys/mkdev.h> # define HAVE_MAJOR #endif #ifdef HAVE_SYS_SYSMACROS_H # include <sys/sysmacros.h> #endif #ifdef MAJOR_IN_SYSMACROS # define HAVE_MAJOR #endif #if defined(major) && !defined(HAVE_MAJOR) /* Might be defined in sys/types.h. */ # define HAVE_MAJOR #endif #ifdef WIN32 # define WIN32_LEAN_AND_MEAN # include <windows.h> #endif #ifndef HAVE_MAJOR # define major(dev) (((dev) >> 8) & 0xff) # define minor(dev) ((dev) & 0xff) #endif #undef HAVE_MAJOR #ifdef PHP_WIN32 # undef S_IFIFO #endif private int handle_mime(struct magic_set *ms, int mime, const char *str) { if ((mime & MAGIC_MIME_TYPE)) { if (file_printf(ms, "inode/%s", str) == -1) return -1; if ((mime & MAGIC_MIME_ENCODING) && file_printf(ms, "; charset=") == -1) return -1; } if ((mime & MAGIC_MIME_ENCODING) && file_printf(ms, "binary") == -1) return -1; return 0; } protected int file_fsmagic(struct magic_set *ms, const char *fn, zend_stat_t *sb) { int ret, did = 0; int mime = ms->flags & MAGIC_MIME; int silent = ms->flags & (MAGIC_APPLE|MAGIC_EXTENSION); if (fn == NULL) return 0; #define COMMA (did++ ? ", " : "") ret = php_sys_stat(fn, sb); if (ret) { if (ms->flags & MAGIC_ERROR) { file_error(ms, errno, "cannot stat `%s'", fn); return -1; } if (file_printf(ms, "cannot open `%s' (%s)", fn, strerror(errno)) == -1) return -1; return 0; } ret = 1; if (!mime && !silent) { #ifdef S_ISUID if (sb->st_mode & S_ISUID) if (file_printf(ms, "%ssetuid", COMMA) == -1) return -1; #endif #ifdef S_ISGID if (sb->st_mode & S_ISGID) if (file_printf(ms, "%ssetgid", COMMA) == -1) return -1; #endif #ifdef S_ISVTX if (sb->st_mode & S_ISVTX) if (file_printf(ms, "%ssticky", COMMA) == -1) return -1; #endif } switch (sb->st_mode & S_IFMT) { #ifndef PHP_WIN32 # ifdef S_IFCHR case S_IFCHR: /* * If -s has been specified, treat character special files * like ordinary files. Otherwise, just report that they * are block special files and go on to the next file. */ if ((ms->flags & MAGIC_DEVICES) != 0) { ret = 0; break; } if (mime) { if (handle_mime(ms, mime, "chardevice") == -1) return -1; } else { # ifdef HAVE_STAT_ST_RDEV # ifdef dv_unit if (file_printf(ms, "%scharacter special (%d/%d/%d)", COMMA, major(sb->st_rdev), dv_unit(sb->st_rdev), dv_subunit(sb->st_rdev)) == -1) return -1; # else if (file_printf(ms, "%scharacter special (%ld/%ld)", COMMA, (long)major(sb->st_rdev), (long)minor(sb->st_rdev)) == -1) return -1; # endif #else if (file_printf(ms, "%scharacter special", COMMA) == -1) return -1; #endif } return 1; # endif #endif #ifdef S_IFIFO case S_IFIFO: if((ms->flags & MAGIC_DEVICES) != 0) break; if (mime) { if (handle_mime(ms, mime, "fifo") == -1) return -1; } else if (silent) { } else if (file_printf(ms, "%sfifo (named pipe)", COMMA) == -1) return -1; break; #endif #ifdef S_IFDOOR case S_IFDOOR: if (mime) { if (handle_mime(ms, mime, "door") == -1) return -1; } else if (silent) { } else if (file_printf(ms, "%sdoor", COMMA) == -1) return -1; break; #endif #ifdef S_IFLNK case S_IFLNK: /* stat is used, if it made here then the link is broken */ if (ms->flags & MAGIC_ERROR) { file_error(ms, errno, "unreadable symlink `%s'", fn); return -1; } return 1; #endif #ifdef S_IFSOCK #ifndef __COHERENT__ case S_IFSOCK: if (mime) { if (handle_mime(ms, mime, "socket") == -1) return -1; } else if (silent) { } else if (file_printf(ms, "%ssocket", COMMA) == -1) return -1; break; #endif #endif case S_IFREG: /* * regular file, check next possibility * * If stat() tells us the file has zero length, report here that * the file is empty, so we can skip all the work of opening and * reading the file. * But if the -s option has been given, we skip this * optimization, since on some systems, stat() reports zero * size for raw disk partitions. (If the block special device * really has zero length, the fact that it is empty will be * detected and reported correctly when we read the file.) */ if ((ms->flags & MAGIC_DEVICES) == 0 && sb->st_size == 0) { if (mime) { if (handle_mime(ms, mime, "x-empty") == -1) return -1; } else if (silent) { } else if (file_printf(ms, "%sempty", COMMA) == -1) return -1; break; } ret = 0; break; default: file_error(ms, 0, "invalid mode 0%o", sb->st_mode); return -1; /*NOTREACHED*/ } if (!silent && !mime && did && ret == 0) { if (file_printf(ms, " ") == -1) return -1; } /* * If we were looking for extensions or apple (silent) it is not our * job to print here, so don't count this as a match. */ if (ret == 1 && silent) return 0; return ret; }