elflink: add new files

new file:   com32/include/getopt.h
new file:   com32/include/ilog2.h
new file:   com32/lib/getopt_long.c
new file:   com32/lib/sys/sleep.c
new file:   com32/sysdump/acpi.c
new file:   com32/sysdump/be_srec.c
new file:   com32/sysdump/rbtree.c
new file:   com32/sysdump/rbtree.h
new file:   dos/getsetsl.c
new file:   dos/memmove.S
new file:   libinstaller/advio.c
new file:   libinstaller/fat.c
new file:   libinstaller/linuxioctl.h
new file:   memdisk/compiler.h
new file:   memdisk/mstructs.h
new file:   utils/memdiskfind.c

3 files changed, 338 insertions, 0 deletions

diff --git a/libinstaller/advio.c b/libinstaller/advio.c
new file mode 100644
index 00000000..56f607d0
--- /dev/null
+++ b/libinstaller/advio.c
@@ -0,0 +1,162 @@
+/* ----------------------------------------------------------------------- *
+ *
+ *   Copyright 2007-2008 H. Peter Anvin - All Rights Reserved
+ *   Copyright 2010 Intel Corporation; author: H. Peter Anvin
+ *
+ *   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.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * advio.c
+ *
+ * Linux ADV I/O
+ *
+ * Return 0 on success, -1 on error, and set errno.
+ *
+ */
+#define  _GNU_SOURCE
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include "syslxint.h"
+#include "syslxcom.h"
+
+/*
+ * Read the ADV from an existing instance, or initialize if invalid.
+ * Returns -1 on fatal errors, 0 if ADV is okay, 1 if the ADV is
+ * invalid, and 2 if the file does not exist.
+ */
+int read_adv(const char *path, const char *cfg)
+{
+    char *file;
+    int fd = -1;
+    struct stat st;
+    int err = 0;
+    int rv;
+
+    rv = asprintf(&file, "%s%s%s", path,
+		  path[0] && path[strlen(path) - 1] == '/' ? "" : "/", cfg);
+
+    if (rv < 0 || !file) {
+	perror(program);
+	return -1;
+    }
+
+    fd = open(file, O_RDONLY);
+    if (fd < 0) {
+	if (errno != ENOENT) {
+	    err = -1;
+	} else {
+	    syslinux_reset_adv(syslinux_adv);
+	    err = 2;		/* Nonexistence is not a fatal error */
+	}
+    } else if (fstat(fd, &st)) {
+	err = -1;
+    } else if (st.st_size < 2 * ADV_SIZE) {
+	/* Too small to be useful */
+	syslinux_reset_adv(syslinux_adv);
+	err = 0;		/* Nothing to read... */
+    } else if (xpread(fd, syslinux_adv, 2 * ADV_SIZE,
+		      st.st_size - 2 * ADV_SIZE) != 2 * ADV_SIZE) {
+	err = -1;
+    } else {
+	/* We got it... maybe? */
+	err = syslinux_validate_adv(syslinux_adv) ? 1 : 0;
+    }
+
+    if (err < 0)
+	perror(file);
+
+    if (fd >= 0)
+	close(fd);
+
+    free(file);
+
+    return err;
+}
+
+/*
+ * Update the ADV in an existing installation.
+ */
+int write_adv(const char *path, const char *cfg)
+{
+    unsigned char advtmp[2 * ADV_SIZE];
+    char *file;
+    int fd = -1;
+    struct stat st, xst;
+    int err = 0;
+    int rv;
+
+    rv = asprintf(&file, "%s%s%s", path,
+		  path[0] && path[strlen(path) - 1] == '/' ? "" : "/", cfg);
+
+    if (rv < 0 || !file) {
+	perror(program);
+	return -1;
+    }
+
+    fd = open(file, O_RDONLY);
+    if (fd < 0) {
+	err = -1;
+    } else if (fstat(fd, &st)) {
+	err = -1;
+    } else if (st.st_size < 2 * ADV_SIZE) {
+	/* Too small to be useful */
+	err = -2;
+    } else if (xpread(fd, advtmp, 2 * ADV_SIZE,
+		      st.st_size - 2 * ADV_SIZE) != 2 * ADV_SIZE) {
+	err = -1;
+    } else {
+	/* We got it... maybe? */
+	err = syslinux_validate_adv(advtmp) ? -2 : 0;
+	if (!err) {
+	    /* Got a good one, write our own ADV here */
+	    clear_attributes(fd);
+
+	    /* Need to re-open read-write */
+	    close(fd);
+	    fd = open(file, O_RDWR | O_SYNC);
+	    if (fd < 0) {
+		err = -1;
+	    } else if (fstat(fd, &xst) || xst.st_ino != st.st_ino ||
+		       xst.st_dev != st.st_dev || xst.st_size != st.st_size) {
+		fprintf(stderr, "%s: race condition on write\n", file);
+		err = -2;
+	    }
+	    /* Write our own version ... */
+	    if (xpwrite(fd, syslinux_adv, 2 * ADV_SIZE,
+			st.st_size - 2 * ADV_SIZE) != 2 * ADV_SIZE) {
+		err = -1;
+	    }
+
+	    sync();
+	    set_attributes(fd);
+	}
+    }
+
+    if (err == -2)
+	fprintf(stderr, "%s: cannot write auxilliary data (need --update)?\n",
+		file);
+    else if (err == -1)
+	perror(file);
+
+    if (fd >= 0)
+	close(fd);
+    if (file)
+	free(file);
+
+    return err;
+}
diff --git a/libinstaller/fat.c b/libinstaller/fat.c
new file mode 100644
index 00000000..e2101353
--- /dev/null
+++ b/libinstaller/fat.c
@@ -0,0 +1,129 @@
+/* ----------------------------------------------------------------------- *
+ *
+ *   Copyright 1998-2008 H. Peter Anvin - All Rights Reserved
+ *   Copyright 2009-2010 Intel Corporation; author H. Peter Anvin
+ *
+ *   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.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * fat.c - Initial sanity check for FAT-based installers
+ */
+
+#define _XOPEN_SOURCE 500	/* Required on glibc 2.x */
+#define _BSD_SOURCE
+#include <stdio.h>
+#include <inttypes.h>
+#include <string.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+#include "syslinux.h"
+#include "syslxint.h"
+
+void syslinux_make_bootsect(void *bs)
+{
+    struct boot_sector *bootsect = bs;
+    const struct boot_sector *sbs =
+	(const struct boot_sector *)boot_sector;
+
+    memcpy(&bootsect->bsHead, &sbs->bsHead, bsHeadLen);
+    memcpy(&bootsect->bsCode, &sbs->bsCode, bsCodeLen);
+}
+
+/*
+ * Check to see that what we got was indeed an MS-DOS boot sector/superblock;
+ * Return NULL if OK and otherwise an error message;
+ */
+const char *syslinux_check_bootsect(const void *bs)
+{
+    int veryold;
+    int sectorsize;
+    long long sectors, fatsectors, dsectors;
+    long long clusters;
+    int rootdirents, clustersize;
+    const struct boot_sector *sectbuf = bs;
+
+    veryold = 0;
+
+    /* Must be 0xF0 or 0xF8..0xFF */
+    if (get_8(&sectbuf->bsMedia) != 0xF0 && get_8(&sectbuf->bsMedia) < 0xF8)
+	return "invalid media signature (not a FAT filesystem?)";
+
+    sectorsize = get_16(&sectbuf->bsBytesPerSec);
+    if (sectorsize == SECTOR_SIZE)
+	;			/* ok */
+    else if (sectorsize >= 512 && sectorsize <= 4096 &&
+	     (sectorsize & (sectorsize - 1)) == 0)
+	return "unsupported sectors size";
+    else
+	return "impossible sector size";
+
+    clustersize = get_8(&sectbuf->bsSecPerClust);
+    if (clustersize == 0 || (clustersize & (clustersize - 1)))
+	return "impossible cluster size";
+
+    sectors = get_16(&sectbuf->bsSectors);
+    sectors = sectors ? sectors : get_32(&sectbuf->bsHugeSectors);
+
+    dsectors = sectors - get_16(&sectbuf->bsResSectors);
+
+    fatsectors = get_16(&sectbuf->bsFATsecs);
+    fatsectors = fatsectors ? fatsectors : get_32(&sectbuf->bs32.FATSz32);
+    fatsectors *= get_8(&sectbuf->bsFATs);
+    dsectors -= fatsectors;
+
+    rootdirents = get_16(&sectbuf->bsRootDirEnts);
+    dsectors -= (rootdirents + sectorsize / 32 - 1) / sectorsize;
+
+    if (dsectors < 0)
+	return "negative number of data sectors";
+
+    if (fatsectors == 0)
+	return "zero FAT sectors";
+
+    clusters = dsectors / clustersize;
+
+    if (clusters < 0xFFF5) {
+	/* FAT12 or FAT16 */
+
+	if (!get_16(&sectbuf->bsFATsecs))
+	    return "zero FAT sectors (FAT12/16)";
+
+	if (get_8(&sectbuf->bs16.BootSignature) == 0x29) {
+	    if (!memcmp(&sectbuf->bs16.FileSysType, "FAT12   ", 8)) {
+		if (clusters >= 0xFF5)
+		    return "more than 4084 clusters but claims FAT12";
+	    } else if (!memcmp(&sectbuf->bs16.FileSysType, "FAT16   ", 8)) {
+		if (clusters < 0xFF5)
+		    return "less than 4084 clusters but claims FAT16";
+	    } else if (!memcmp(&sectbuf->bs16.FileSysType, "FAT32   ", 8)) {
+		    return "less than 65525 clusters but claims FAT32";
+	    } else if (memcmp(&sectbuf->bs16.FileSysType, "FAT     ", 8)) {
+		static char fserr[] =
+		    "filesystem type \"????????\" not supported";
+		memcpy(fserr + 17, &sectbuf->bs16.FileSysType, 8);
+		return fserr;
+	    }
+	}
+    } else if (clusters < 0x0FFFFFF5) {
+	/*
+	 * FAT32...
+	 *
+	 * Moving the FileSysType and BootSignature was a lovely stroke
+	 * of M$ idiocy...
+	 */
+	if (get_8(&sectbuf->bs32.BootSignature) != 0x29 ||
+	    memcmp(&sectbuf->bs32.FileSysType, "FAT32   ", 8))
+	    return "missing FAT32 signature";
+    } else {
+	return "impossibly large number of clusters";
+    }
+
+    return NULL;
+}
diff --git a/libinstaller/linuxioctl.h b/libinstaller/linuxioctl.h
new file mode 100644
index 00000000..7ef919a3
--- /dev/null
+++ b/libinstaller/linuxioctl.h
@@ -0,0 +1,47 @@
+/*
+ * linuxioctl.h
+ *
+ * Wrapper for Linux ioctl definitions, including workarounds
+ */
+
+#ifndef LIBINSTALLER_LINUXIOCTL_H
+#define LIBINSTALLER_LINUXIOCTL_H
+
+#include <sys/ioctl.h>
+
+#define statfs _kernel_statfs	/* HACK to deal with broken 2.4 distros */
+
+#include <linux/fd.h>		/* Floppy geometry */
+#include <linux/hdreg.h>	/* Hard disk geometry */
+
+#include <linux/fs.h>		/* FIGETBSZ, FIBMAP, FS_IOC_FIEMAP */
+#include <linux/msdos_fs.h>	/* FAT_IOCTL_SET_ATTRIBUTES */
+
+#undef SECTOR_SIZE		/* Defined in msdos_fs.h for no good reason */
+#undef SECTOR_BITS
+#include <linux/ext2_fs.h>	/* EXT2_IOC_* */
+
+#ifndef FAT_IOCTL_GET_ATTRIBUTES
+# define FAT_IOCTL_GET_ATTRIBUTES	_IOR('r', 0x10, __u32)
+#endif
+
+#ifndef FAT_IOCTL_SET_ATTRIBUTES
+# define FAT_IOCTL_SET_ATTRIBUTES	_IOW('r', 0x11, __u32)
+#endif
+
+#include <linux/fiemap.h>	/* FIEMAP definitions */
+
+#ifndef FS_IOC_FIEMAP
+# define FS_IOC_FIEMAP		_IOWR('f', 11, struct fiemap)
+#endif
+
+#undef statfs
+
+#if defined(__linux__) && !defined(BLKGETSIZE64)
+/* This takes a u64, but the size field says size_t.  Someone screwed big. */
+# define BLKGETSIZE64 _IOR(0x12,114,size_t)
+#endif
+
+#include <linux/loop.h>
+
+#endif /* LIBINSTALLER_LINUXIOCTL_H */