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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  * This file can be redistributed under the terms of the GNU Library General
      9  * Public License
     10  */
     11 
     12 /*
     13  * History:
     14  * 93/10/30	- Creation
     15  */
     16 
     17 #define _LARGEFILE_SOURCE
     18 #define _LARGEFILE64_SOURCE
     19 
     20 #if HAVE_ERRNO_H
     21 #include <errno.h>
     22 #endif
     23 #if HAVE_UNISTD_H
     24 #include <unistd.h>
     25 #endif
     26 #include <sys/types.h>
     27 #include <sys/stat.h>
     28 #if HAVE_EXT2_IOCTLS
     29 #include <fcntl.h>
     30 #include <sys/ioctl.h>
     31 #endif
     32 
     33 #include "e2p.h"
     34 
     35 #ifdef O_LARGEFILE
     36 #define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE)
     37 #else
     38 #define OPEN_FLAGS (O_RDONLY|O_NONBLOCK)
     39 #endif
     40 
     41 int fgetflags (const char * name, unsigned long * flags)
     42 {
     43 	struct stat buf;
     44 #if HAVE_STAT_FLAGS && !(APPLE_DARWIN && HAVE_EXT2_IOCTLS)
     45 
     46 	if (stat (name, &buf) == -1)
     47 		return -1;
     48 
     49 	*flags = 0;
     50 #ifdef UF_IMMUTABLE
     51 	if (buf.st_flags & UF_IMMUTABLE)
     52 		*flags |= EXT2_IMMUTABLE_FL;
     53 #endif
     54 #ifdef UF_APPEND
     55 	if (buf.st_flags & UF_APPEND)
     56 		*flags |= EXT2_APPEND_FL;
     57 #endif
     58 #ifdef UF_NODUMP
     59 	if (buf.st_flags & UF_NODUMP)
     60 		*flags |= EXT2_NODUMP_FL;
     61 #endif
     62 
     63 	return 0;
     64 #else
     65 #if HAVE_EXT2_IOCTLS
     66 	int fd, r, f, save_errno = 0;
     67 
     68 	if (!stat(name, &buf) &&
     69 	    !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)) {
     70 		goto notsupp;
     71 	}
     72 #if !APPLE_DARWIN
     73 	fd = open (name, OPEN_FLAGS);
     74 	if (fd == -1)
     75 		return -1;
     76 	r = ioctl (fd, EXT2_IOC_GETFLAGS, &f);
     77 	if (r == -1)
     78 		save_errno = errno;
     79 	*flags = f;
     80 	close (fd);
     81 	if (save_errno)
     82 		errno = save_errno;
     83 	return r;
     84 #else
     85    f = -1;
     86    save_errno = syscall(SYS_fsctl, name, EXT2_IOC_GETFLAGS, &f, 0);
     87    *flags = f;
     88    return (save_errno);
     89 #endif
     90 #endif /* HAVE_EXT2_IOCTLS */
     91 #endif
     92 notsupp:
     93 	errno = EOPNOTSUPP;
     94 	return -1;
     95 }
     96