diff options
Diffstat (limited to 'contrib/syslinux/syslinux-4.03/libinstaller/syslxcom.c')
| -rw-r--r-- | contrib/syslinux/syslinux-4.03/libinstaller/syslxcom.c | 286 |
1 files changed, 0 insertions, 286 deletions
diff --git a/contrib/syslinux/syslinux-4.03/libinstaller/syslxcom.c b/contrib/syslinux/syslinux-4.03/libinstaller/syslxcom.c deleted file mode 100644 index b176f6d..0000000 --- a/contrib/syslinux/syslinux-4.03/libinstaller/syslxcom.c +++ /dev/null @@ -1,286 +0,0 @@ -/* ----------------------------------------------------------------------- * - * - * Copyright 2010 Intel Corp. - All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, Inc., 53 Temple Place Ste 330, - * Boston MA 02111-1307, USA; either version 2 of the License, or - * (at your option) any later version; incorporated herein by reference. - * - * ----------------------------------------------------------------------- */ - -/* - * syslxcom.c - * - * common functions for extlinux & syslinux installer - * - */ -#define _GNU_SOURCE - -#include <stdio.h> -#include <stdlib.h> -#include <stddef.h> -#include <stdint.h> -#include <string.h> -#include <getopt.h> -#include <unistd.h> -#include <errno.h> -#include <sys/stat.h> -#include <sys/types.h> -#include <sys/mount.h> -#include <sys/vfs.h> -#include "linuxioctl.h" -#include "syslxcom.h" - -const char *program; - -int fs_type; - -#ifdef DEBUG -# define dprintf printf -#else -# define dprintf(...) ((void)0) -#endif - -#define SECTOR_SHIFT 9 - -static void die(const char *msg) -{ - fputs(msg, stderr); - exit(1); -} - -/* - * read/write wrapper functions - */ -ssize_t xpread(int fd, void *buf, size_t count, off_t offset) -{ - char *bufp = (char *)buf; - ssize_t rv; - ssize_t done = 0; - - while (count) { - rv = pread(fd, bufp, count, offset); - if (rv == 0) { - die("short read"); - } else if (rv == -1) { - if (errno == EINTR) { - continue; - } else { - die(strerror(errno)); - } - } else { - bufp += rv; - offset += rv; - done += rv; - count -= rv; - } - } - - return done; -} - -ssize_t xpwrite(int fd, const void *buf, size_t count, off_t offset) -{ - const char *bufp = (const char *)buf; - ssize_t rv; - ssize_t done = 0; - - while (count) { - rv = pwrite(fd, bufp, count, offset); - if (rv == 0) { - die("short write"); - } else if (rv == -1) { - if (errno == EINTR) { - continue; - } else { - die(strerror(errno)); - } - } else { - bufp += rv; - offset += rv; - done += rv; - count -= rv; - } - } - - return done; -} - -/* - * Set and clear file attributes - */ -void clear_attributes(int fd) -{ - struct stat st; - - if (!fstat(fd, &st)) { - switch (fs_type) { - case EXT2: - { - int flags; - - if (!ioctl(fd, EXT2_IOC_GETFLAGS, &flags)) { - flags &= ~EXT2_IMMUTABLE_FL; - ioctl(fd, EXT2_IOC_SETFLAGS, &flags); - } - break; - } - case VFAT: - { - uint32_t attr = 0x00; /* Clear all attributes */ - ioctl(fd, FAT_IOCTL_SET_ATTRIBUTES, &attr); - break; - } - default: - break; - } - fchmod(fd, st.st_mode | S_IWUSR); - } -} - -void set_attributes(int fd) -{ - struct stat st; - - if (!fstat(fd, &st)) { - fchmod(fd, st.st_mode & (S_IRUSR | S_IRGRP | S_IROTH)); - switch (fs_type) { - case EXT2: - { - int flags; - - if (st.st_uid == 0 && !ioctl(fd, EXT2_IOC_GETFLAGS, &flags)) { - flags |= EXT2_IMMUTABLE_FL; - ioctl(fd, EXT2_IOC_SETFLAGS, &flags); - } - break; - } - case VFAT: - { - uint32_t attr = 0x07; /* Hidden+System+Readonly */ - ioctl(fd, FAT_IOCTL_SET_ATTRIBUTES, &attr); - break; - } - default: - break; - } - } -} - -/* New FIEMAP based mapping */ -static int sectmap_fie(int fd, sector_t *sectors, int nsectors) -{ - struct fiemap *fm; - struct fiemap_extent *fe; - unsigned int i, nsec; - sector_t sec, *secp, *esec; - struct stat st; - uint64_t maplen; - - if (fstat(fd, &st)) - return -1; - - fm = alloca(sizeof(struct fiemap) - + nsectors * sizeof(struct fiemap_extent)); - - memset(fm, 0, sizeof *fm); - - maplen = (uint64_t)nsectors << SECTOR_SHIFT; - if (maplen > (uint64_t)st.st_size) - maplen = st.st_size; - - fm->fm_start = 0; - fm->fm_length = maplen; - fm->fm_flags = FIEMAP_FLAG_SYNC; - fm->fm_extent_count = nsectors; - - if (ioctl(fd, FS_IOC_FIEMAP, fm)) - return -1; - - memset(sectors, 0, nsectors * sizeof *sectors); - esec = sectors + nsectors; - - fe = fm->fm_extents; - - if (fm->fm_mapped_extents < 1 || - !(fe[fm->fm_mapped_extents-1].fe_flags & FIEMAP_EXTENT_LAST)) - return -1; - - for (i = 0; i < fm->fm_mapped_extents; i++) { - if (fe->fe_flags & FIEMAP_EXTENT_LAST) { - /* If this is the *final* extent, pad the length */ - fe->fe_length = (fe->fe_length + SECTOR_SIZE - 1) - & ~(SECTOR_SIZE - 1); - } - - if ((fe->fe_logical | fe->fe_physical| fe->fe_length) & - (SECTOR_SIZE - 1)) - return -1; - - if (fe->fe_flags & (FIEMAP_EXTENT_UNKNOWN| - FIEMAP_EXTENT_DELALLOC| - FIEMAP_EXTENT_ENCODED| - FIEMAP_EXTENT_DATA_ENCRYPTED| - FIEMAP_EXTENT_UNWRITTEN)) - return -1; - - secp = sectors + (fe->fe_logical >> SECTOR_SHIFT); - sec = fe->fe_physical >> SECTOR_SHIFT; - nsec = fe->fe_length >> SECTOR_SHIFT; - - while (nsec--) { - if (secp >= esec) - break; - *secp++ = sec++; - } - - fe++; - } - - return 0; -} - -/* Legacy FIBMAP based mapping */ -static int sectmap_fib(int fd, sector_t *sectors, int nsectors) -{ - unsigned int blk, nblk; - unsigned int i; - unsigned int blksize; - sector_t sec; - - /* Get block size */ - if (ioctl(fd, FIGETBSZ, &blksize)) - return -1; - - /* Number of sectors per block */ - blksize >>= SECTOR_SHIFT; - - nblk = 0; - while (nsectors) { - blk = nblk++; - if (ioctl(fd, FIBMAP, &blk)) - return -1; - - sec = (sector_t)blk * blksize; - for (i = 0; i < blksize; i++) { - *sectors++ = sec++; - if (! --nsectors) - break; - } - } - - return 0; -} - -/* - * Produce file map - */ -int sectmap(int fd, sector_t *sectors, int nsectors) -{ - if (!sectmap_fie(fd, sectors, nsectors)) - return 0; - - return sectmap_fib(fd, sectors, nsectors); -} |