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-rw-r--r--arch/alpha/kernel/srm_env.c84
1 files changed, 27 insertions, 57 deletions
diff --git a/arch/alpha/kernel/srm_env.c b/arch/alpha/kernel/srm_env.c
index 990ac61..f7dd081 100644
--- a/arch/alpha/kernel/srm_env.c
+++ b/arch/alpha/kernel/srm_env.c
@@ -2,7 +2,7 @@
* srm_env.c - Access to SRM environment
* variables through linux' procfs
*
- * Copyright (C) 2001-2002 Jan-Benedict Glaw <jbglaw@lug-owl.de>
+ * (C) 2001,2002,2006 by Jan-Benedict Glaw <jbglaw@lug-owl.de>
*
* This driver is at all a modified version of Erik Mouw's
* Documentation/DocBook/procfs_example.c, so: thank
@@ -21,7 +21,7 @@
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more
* details.
- *
+ *
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place,
@@ -29,33 +29,6 @@
*
*/
-/*
- * Changelog
- * ~~~~~~~~~
- *
- * Thu, 22 Aug 2002 15:10:43 +0200
- * - Update Config.help entry. I got a number of emails asking
- * me to tell their senders if they could make use of this
- * piece of code... So: "SRM is something like BIOS for your
- * Alpha"
- * - Update code formatting a bit to better conform CodingStyle
- * rules.
- * - So this is v0.0.5, with no changes (except formatting)
- *
- * Wed, 22 May 2002 00:11:21 +0200
- * - Fix typo on comment (SRC -> SRM)
- * - Call this "Version 0.0.4"
- *
- * Tue, 9 Apr 2002 18:44:40 +0200
- * - Implement access by variable name and additionally
- * by number. This is done by creating two subdirectories
- * where one holds all names (like the old directory
- * did) and the other holding 256 files named like "0",
- * "1" and so on.
- * - Call this "Version 0.0.3"
- *
- */
-
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
@@ -67,7 +40,7 @@
#define BASE_DIR "srm_environment" /* Subdir in /proc/ */
#define NAMED_DIR "named_variables" /* Subdir for known variables */
#define NUMBERED_DIR "numbered_variables" /* Subdir for all variables */
-#define VERSION "0.0.5" /* Module version */
+#define VERSION "0.0.6" /* Module version */
#define NAME "srm_env" /* Module name */
MODULE_AUTHOR("Jan-Benedict Glaw <jbglaw@lug-owl.de>");
@@ -106,7 +79,6 @@ static srm_env_t srm_named_entries[] = {
static srm_env_t srm_numbered_entries[256];
-
static int
srm_env_read(char *page, char **start, off_t off, int count, int *eof,
void *data)
@@ -115,21 +87,23 @@ srm_env_read(char *page, char **start, off_t off, int count, int *eof,
unsigned long ret;
srm_env_t *entry;
- if(off != 0)
- return -EFAULT;
+ if (off != 0) {
+ *eof = 1;
+ return 0;
+ }
entry = (srm_env_t *) data;
ret = callback_getenv(entry->id, page, count);
- if((ret >> 61) == 0)
+ if ((ret >> 61) == 0) {
nbytes = (int) ret;
- else
+ *eof = 1;
+ } else
nbytes = -EFAULT;
return nbytes;
}
-
static int
srm_env_write(struct file *file, const char __user *buffer, unsigned long count,
void *data)
@@ -155,7 +129,7 @@ srm_env_write(struct file *file, const char __user *buffer, unsigned long count,
ret1 = callback_setenv(entry->id, buf, count);
if ((ret1 >> 61) == 0) {
- do
+ do
ret2 = callback_save_env();
while((ret2 >> 61) == 1);
res = (int) ret1;
@@ -172,14 +146,14 @@ srm_env_cleanup(void)
srm_env_t *entry;
unsigned long var_num;
- if(base_dir) {
+ if (base_dir) {
/*
* Remove named entries
*/
- if(named_dir) {
+ if (named_dir) {
entry = srm_named_entries;
- while(entry->name != NULL && entry->id != 0) {
- if(entry->proc_entry) {
+ while (entry->name != NULL && entry->id != 0) {
+ if (entry->proc_entry) {
remove_proc_entry(entry->name,
named_dir);
entry->proc_entry = NULL;
@@ -192,11 +166,11 @@ srm_env_cleanup(void)
/*
* Remove numbered entries
*/
- if(numbered_dir) {
- for(var_num = 0; var_num <= 255; var_num++) {
+ if (numbered_dir) {
+ for (var_num = 0; var_num <= 255; var_num++) {
entry = &srm_numbered_entries[var_num];
- if(entry->proc_entry) {
+ if (entry->proc_entry) {
remove_proc_entry(entry->name,
numbered_dir);
entry->proc_entry = NULL;
@@ -212,7 +186,6 @@ srm_env_cleanup(void)
return;
}
-
static int __init
srm_env_init(void)
{
@@ -222,7 +195,7 @@ srm_env_init(void)
/*
* Check system
*/
- if(!alpha_using_srm) {
+ if (!alpha_using_srm) {
printk(KERN_INFO "%s: This Alpha system doesn't "
"know about SRM (or you've booted "
"SRM->MILO->Linux, which gets "
@@ -233,14 +206,14 @@ srm_env_init(void)
/*
* Init numbers
*/
- for(var_num = 0; var_num <= 255; var_num++)
+ for (var_num = 0; var_num <= 255; var_num++)
sprintf(number[var_num], "%ld", var_num);
/*
* Create base directory
*/
base_dir = proc_mkdir(BASE_DIR, NULL);
- if(base_dir == NULL) {
+ if (!base_dir) {
printk(KERN_ERR "Couldn't create base dir /proc/%s\n",
BASE_DIR);
goto cleanup;
@@ -251,7 +224,7 @@ srm_env_init(void)
* Create per-name subdirectory
*/
named_dir = proc_mkdir(NAMED_DIR, base_dir);
- if(named_dir == NULL) {
+ if (!named_dir) {
printk(KERN_ERR "Couldn't create dir /proc/%s/%s\n",
BASE_DIR, NAMED_DIR);
goto cleanup;
@@ -262,7 +235,7 @@ srm_env_init(void)
* Create per-number subdirectory
*/
numbered_dir = proc_mkdir(NUMBERED_DIR, base_dir);
- if(numbered_dir == NULL) {
+ if (!numbered_dir) {
printk(KERN_ERR "Couldn't create dir /proc/%s/%s\n",
BASE_DIR, NUMBERED_DIR);
goto cleanup;
@@ -274,10 +247,10 @@ srm_env_init(void)
* Create all named nodes
*/
entry = srm_named_entries;
- while(entry->name != NULL && entry->id != 0) {
+ while (entry->name && entry->id) {
entry->proc_entry = create_proc_entry(entry->name,
0644, named_dir);
- if(entry->proc_entry == NULL)
+ if (!entry->proc_entry)
goto cleanup;
entry->proc_entry->data = (void *) entry;
@@ -291,13 +264,13 @@ srm_env_init(void)
/*
* Create all numbered nodes
*/
- for(var_num = 0; var_num <= 255; var_num++) {
+ for (var_num = 0; var_num <= 255; var_num++) {
entry = &srm_numbered_entries[var_num];
entry->name = number[var_num];
entry->proc_entry = create_proc_entry(entry->name,
0644, numbered_dir);
- if(entry->proc_entry == NULL)
+ if (!entry->proc_entry)
goto cleanup;
entry->id = var_num;
@@ -318,7 +291,6 @@ cleanup:
return -ENOMEM;
}
-
static void __exit
srm_env_exit(void)
{
@@ -328,7 +300,5 @@ srm_env_exit(void)
return;
}
-
module_init(srm_env_init);
module_exit(srm_env_exit);
-
generated by cgit v1.1 at 2024-12-27 09:38:16 +0000