diff options
author | Bjørn Mork <bjorn@mork.no> | 2015-05-15 10:20:47 +0200 |
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committer | Bjørn Mork <bjorn@mork.no> | 2015-05-15 10:20:47 +0200 |
commit | 73b16af8feec390afbabd9356d6e5e83c0390838 (patch) | |
tree | 3730020ba2f9caeb9d7815a975af51830b51ce11 /e2fsprogs/old_e2fsprogs/e2p/fgetsetversion.c |
busybox: imported from http://www.busybox.net/downloads/busybox-1.13.3.tar.bz2busybox-1.13.3
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Diffstat (limited to 'e2fsprogs/old_e2fsprogs/e2p/fgetsetversion.c')
-rw-r--r-- | e2fsprogs/old_e2fsprogs/e2p/fgetsetversion.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/e2fsprogs/old_e2fsprogs/e2p/fgetsetversion.c b/e2fsprogs/old_e2fsprogs/e2p/fgetsetversion.c new file mode 100644 index 0000000..8d79054 --- /dev/null +++ b/e2fsprogs/old_e2fsprogs/e2p/fgetsetversion.c @@ -0,0 +1,70 @@ +/* vi: set sw=4 ts=4: */ +/* + * fgetversion.c - Get a file version on an ext2 file system + * fsetversion.c - Set a file version on an ext2 file system + * + * + * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr> + * Laboratoire MASI, Institut Blaise Pascal + * Universite Pierre et Marie Curie (Paris VI) + * + * This file can be redistributed under the terms of the GNU Library General + * Public License + */ + +/* + * History: + * 93/10/30 - Creation + */ + +#ifdef HAVE_ERRNO_H +#include <errno.h> +#endif +#ifdef HAVE_UNISTD_H +#include <unistd.h> +#endif +#include <fcntl.h> +#include <sys/ioctl.h> + +#include "e2p.h" + +#ifdef O_LARGEFILE +#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE) +#else +#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK) +#endif + +/* + To do fsetversion: unsigned long *ptr_version must be set to NULL. + and unsigned long version must be set to a value + To do fgetversion: unsigned long *ptr_version must NOT be set to NULL + and unsigned long version is ignored. + TITO. +*/ + +int fgetsetversion (const char * name, unsigned long * get_version, unsigned long set_version) +{ +#ifdef HAVE_EXT2_IOCTLS + int fd, r, ver, save_errno = 0; + + fd = open (name, OPEN_FLAGS); + if (fd == -1) + return -1; + if (!get_version) { + ver = (int) set_version; + r = ioctl (fd, EXT2_IOC_SETVERSION, &ver); + } else { + r = ioctl (fd, EXT2_IOC_GETVERSION, &ver); + *get_version = ver; + } + if (r == -1) + save_errno = errno; + close (fd); + if (save_errno) + errno = save_errno; + return r; +#else /* ! HAVE_EXT2_IOCTLS */ + errno = EOPNOTSUPP; + return -1; +#endif /* ! HAVE_EXT2_IOCTLS */ +} |