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authorH. Peter Anvin <hpa@linux.intel.com>2010-06-22 16:52:32 -0700
committerH. Peter Anvin <hpa@linux.intel.com>2010-06-22 16:52:32 -0700
commita73b14259504d25e782df6cef4331fbd8710f575 (patch)
tree8bb189a08cf9b705af566d0f1f7e9f21fbba0ece /libinstaller
parentad0d53c9ed34da93d7b9ce96ffaf5570c7c2a95b (diff)
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win32: vacuous ADV support
Install an empty ADV in the Windows installer to keep it from being broken. In order to do that, separate the Unix-specific ADV I/O functions from the generic data structure manipulation. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'libinstaller')
-rw-r--r--libinstaller/advio.c159
-rw-r--r--libinstaller/setadv.c130
2 files changed, 160 insertions, 129 deletions
diff --git a/libinstaller/advio.c b/libinstaller/advio.c
new file mode 100644
index 00000000..3112fa42
--- /dev/null
+++ b/libinstaller/advio.c
@@ -0,0 +1,159 @@
+/* ----------------------------------------------------------------------- *
+ *
+ * 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, and 1 if no valid
+ * ADV was found.
+ */
+int read_adv(const char *path, const char *cfg)
+{
+ char *file;
+ int fd = -1;
+ struct stat st;
+ int err = 0;
+
+ asprintf(&file, "%s%s%s",
+ path, path[0] && path[strlen(path) - 1] == '/' ? "" : "/", cfg);
+
+ if (!file) {
+ perror(program);
+ return -1;
+ }
+
+ fd = open(file, O_RDONLY);
+ if (fd < 0) {
+ if (errno != ENOENT) {
+ err = -1;
+ } else {
+ syslinux_reset_adv(syslinux_adv);
+ }
+ } 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;
+
+ err = asprintf(&file, "%s%s%s",
+ path, path[0] && path[strlen(path) - 1] == '/' ? "" : "/", cfg);
+
+ if (!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/setadv.c b/libinstaller/setadv.c
index c891b87f..61f1f345 100644
--- a/libinstaller/setadv.c
+++ b/libinstaller/setadv.c
@@ -1,6 +1,7 @@
/* ----------------------------------------------------------------------- *
*
* 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
@@ -26,12 +27,7 @@
#include <stddef.h>
#include <stdint.h>
#include <string.h>
-#include <getopt.h>
-#include <unistd.h>
#include <errno.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <sys/stat.h>
#include <sys/types.h>
#include "syslxint.h"
#include "syslxcom.h"
@@ -170,127 +166,3 @@ int syslinux_validate_adv(unsigned char *advbuf)
return -1;
}
}
-
-/*
- * Read the ADV from an existing instance, or initialize if invalid.
- * Returns -1 on fatal errors, 0 if ADV is okay, and 1 if no valid
- * ADV was found.
- */
-int read_adv(const char *path, const char *cfg)
-{
- char *file;
- int fd = -1;
- struct stat st;
- int err = 0;
-
- asprintf(&file, "%s%s%s",
- path, path[0] && path[strlen(path) - 1] == '/' ? "" : "/", cfg);
-
- if (!file) {
- perror(program);
- return -1;
- }
-
- fd = open(file, O_RDONLY);
- if (fd < 0) {
- if (errno != ENOENT) {
- err = -1;
- } else {
- syslinux_reset_adv(syslinux_adv);
- }
- } 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;
-
- err = asprintf(&file, "%s%s%s",
- path, path[0] && path[strlen(path) - 1] == '/' ? "" : "/", cfg);
-
- if (!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;
-}