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      1 /*
      2  * fgetflags.c		- Get a file flags on an ext2 file system
      3  *
      4  * Copyright (C) 1993, 1994  Remy Card <card (at) masi.ibp.fr>
      5  *                           Laboratoire MASI, Institut Blaise Pascal
      6  *                           Universite Pierre et Marie Curie (Paris VI)
      7  *
      8  * %Begin-Header%
      9  * This file may be redistributed under the terms of the GNU Library
     10  * General Public License, version 2.
     11  * %End-Header%
     12  */
     13 
     14 /*
     15  * History:
     16  * 93/10/30	- Creation
     17  */
     18 
     19 #define _LARGEFILE_SOURCE
     20 #define _LARGEFILE64_SOURCE
     21 
     22 #if HAVE_ERRNO_H
     23 #include <errno.h>
     24 #endif
     25 #if HAVE_UNISTD_H
     26 #include <unistd.h>
     27 #endif
     28 #include <sys/types.h>
     29 #include <sys/stat.h>
     30 #if HAVE_EXT2_IOCTLS
     31 #include <fcntl.h>
     32 #include <sys/ioctl.h>
     33 #endif
     34 
     35 #include "e2p.h"
     36 
     37 #ifdef O_LARGEFILE
     38 #define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE)
     39 #else
     40 #define OPEN_FLAGS (O_RDONLY|O_NONBLOCK)
     41 #endif
     42 
     43 int fgetflags (const char * name, unsigned long * flags)
     44 {
     45 	struct stat buf;
     46 #if HAVE_STAT_FLAGS && !(APPLE_DARWIN && HAVE_EXT2_IOCTLS)
     47 
     48 	if (stat (name, &buf) == -1)
     49 		return -1;
     50 
     51 	*flags = 0;
     52 #ifdef UF_IMMUTABLE
     53 	if (buf.st_flags & UF_IMMUTABLE)
     54 		*flags |= EXT2_IMMUTABLE_FL;
     55 #endif
     56 #ifdef UF_APPEND
     57 	if (buf.st_flags & UF_APPEND)
     58 		*flags |= EXT2_APPEND_FL;
     59 #endif
     60 #ifdef UF_NODUMP
     61 	if (buf.st_flags & UF_NODUMP)
     62 		*flags |= EXT2_NODUMP_FL;
     63 #endif
     64 
     65 	return 0;
     66 #else
     67 #if HAVE_EXT2_IOCTLS
     68 	int fd, r, f, save_errno = 0;
     69 
     70 	if (!lstat(name, &buf) &&
     71 	    !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)) {
     72 		goto notsupp;
     73 	}
     74 #if !APPLE_DARWIN
     75 	fd = open (name, OPEN_FLAGS);
     76 	if (fd == -1)
     77 		return -1;
     78 	r = ioctl (fd, EXT2_IOC_GETFLAGS, &f);
     79 	if (r == -1)
     80 		save_errno = errno;
     81 	*flags = f;
     82 	close (fd);
     83 	if (save_errno)
     84 		errno = save_errno;
     85 	return r;
     86 #else
     87    f = -1;
     88    save_errno = syscall(SYS_fsctl, name, EXT2_IOC_GETFLAGS, &f, 0);
     89    *flags = f;
     90    return (save_errno);
     91 #endif
     92 #endif /* HAVE_EXT2_IOCTLS */
     93 #endif
     94 notsupp:
     95 	errno = EOPNOTSUPP;
     96 	return -1;
     97 }
     98