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lib/e2p/fgetversion.c
74 строки
1 KB
Eric Biggers
lib/{e2p,ss}: remove manual declarations of errno
27 янв 2023, 20:33
27 янв 2023, 20:33
dd54f64
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/* * fgetversion.c - Get 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) * * %Begin-Header% * This file may be redistributed under the terms of the GNU Library * General Public License, version 2. * %End-Header% */ /* * History: * 93/10/30 - Creation */ #ifndef _LARGEFILE_SOURCE #define _LARGEFILE_SOURCE #endif #ifndef _LARGEFILE64_SOURCE #define _LARGEFILE64_SOURCE #endif #include "config.h" #if HAVE_ERRNO_H #include <errno.h> #endif #if HAVE_UNISTD_H #include <unistd.h> #endif #include <fcntl.h> #if HAVE_SYS_IOCTL_H #include <sys/ioctl.h> #endif #include "e2p.h" #ifdef O_LARGEFILE #define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE) #else #define OPEN_FLAGS (O_RDONLY|O_NONBLOCK) #endif int fgetversion(const char *name, unsigned long *version) { unsigned int ver = -1; int rc = -1; #if HAVE_EXT2_IOCTLS # if !APPLE_DARWIN int fd, save_errno = 0; fd = open(name, OPEN_FLAGS); if (fd == -1) return -1; rc = ioctl(fd, EXT2_IOC_GETVERSION, &ver); if (rc == -1) save_errno = errno; close(fd); if (rc == -1) errno = save_errno; # else /* APPLE_DARWIN */ rc = syscall(SYS_fsctl, name, EXT2_IOC_GETVERSION, &ver, 0); # endif /* !APPLE_DARWIN */ #else /* ! HAVE_EXT2_IOCTLS */ errno = EOPNOTSUPP; #endif /* ! HAVE_EXT2_IOCTLS */ if (rc == 0) *version = ver; return rc; }