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-rw-r--r--libsysfs/sysfs_utils.c163
1 files changed, 148 insertions, 15 deletions
diff --git a/libsysfs/sysfs_utils.c b/libsysfs/sysfs_utils.c
index a2410abe69..4475342433 100644
--- a/libsysfs/sysfs_utils.c
+++ b/libsysfs/sysfs_utils.c
@@ -3,7 +3,7 @@
*
* System utility functions for libsysfs
*
- * Copyright (C) 2003 International Business Machines, Inc.
+ * Copyright (C) IBM Corp. 2003
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@@ -30,8 +30,8 @@
* @len: size of mnt_path
* returns 0 with success and -1 with error.
*/
-static int sysfs_get_fs_mnt_path(const char *fs_type, char *mnt_path,
- size_t len)
+static int sysfs_get_fs_mnt_path(const unsigned char *fs_type,
+ unsigned char *mnt_path, size_t len)
{
FILE *mnt;
struct mntent *mntent;
@@ -45,7 +45,7 @@ static int sysfs_get_fs_mnt_path(const char *fs_type, char *mnt_path,
}
if ((mnt = setmntent(SYSFS_PROC_MNTS, "r")) == NULL) {
- dprintf(stderr, "Error getting mount information\n");
+ dprintf("Error getting mount information\n");
return -1;
}
while (ret == 0 && dirlen == 0 && (mntent = getmntent(mnt)) != NULL) {
@@ -54,15 +54,14 @@ static int sysfs_get_fs_mnt_path(const char *fs_type, char *mnt_path,
if (dirlen <= (len - 1)) {
strcpy(mnt_path, mntent->mnt_dir);
} else {
- dprintf(stderr,
- "Error - mount path too long\n");
+ dprintf("Error - mount path too long\n");
ret = -1;
}
}
}
endmntent(mnt);
if (dirlen == 0 && ret == 0) {
- dprintf(stderr, "Filesystem %s not found!\n", fs_type);
+ dprintf("Filesystem %s not found!\n", fs_type);
errno = EINVAL;
ret = -1;
}
@@ -75,7 +74,7 @@ static int sysfs_get_fs_mnt_path(const char *fs_type, char *mnt_path,
* @len: size of mnt_path
* returns 0 with success and -1 with error.
*/
-int sysfs_get_mnt_path(char *mnt_path, size_t len)
+int sysfs_get_mnt_path(unsigned char *mnt_path, size_t len)
{
int ret = -1;
@@ -93,9 +92,10 @@ int sysfs_get_mnt_path(char *mnt_path, size_t len)
* @name: where to put name
* @len: size of name
*/
-int sysfs_get_name_from_path(const char *path, char *name, size_t len)
+int sysfs_get_name_from_path(const unsigned char *path, unsigned char *name,
+ size_t len)
{
- char *n = NULL;
+ unsigned char *n = NULL;
if (path == NULL || name == NULL) {
errno = EINVAL;
@@ -118,11 +118,11 @@ int sysfs_get_name_from_path(const char *path, char *name, size_t len)
* @target: where to put name
* @len: size of name
*/
-int sysfs_get_link(const char *path, char *target, size_t len)
+int sysfs_get_link(const unsigned char *path, unsigned char *target, size_t len)
{
- char devdir[SYSFS_PATH_MAX];
- char linkpath[SYSFS_PATH_MAX];
- char *d = NULL;
+ unsigned char devdir[SYSFS_PATH_MAX];
+ unsigned char linkpath[SYSFS_PATH_MAX];
+ unsigned char *d = NULL;
if (path == NULL || target == NULL) {
errno = EINVAL;
@@ -133,7 +133,7 @@ int sysfs_get_link(const char *path, char *target, size_t len)
memset(linkpath, 0, SYSFS_PATH_MAX);
if ((sysfs_get_mnt_path(devdir, SYSFS_PATH_MAX)) != 0) {
- dprintf(stderr, "Sysfs not supported on this system\n");
+ dprintf("Sysfs not supported on this system\n");
return -1;
}
@@ -154,3 +154,136 @@ int sysfs_get_link(const char *path, char *target, size_t len)
return 0;
}
+
+
+/**
+ * sysfs_del_name: free function for sysfs_open_subsystem_list
+ * @name: memory area to be freed
+ */
+void sysfs_del_name(void *name)
+{
+ free(name);
+}
+
+
+/**
+ * sysfs_close_list: generic list free routine
+ * @list: dlist to free
+ * Returns nothing
+ */
+void sysfs_close_list(struct dlist *list)
+{
+ if (list != NULL)
+ dlist_destroy(list);
+}
+
+/**
+ * sysfs_open_subsystem_list: gets a list of all supported "name" subsystem
+ * details from the system
+ * @name: name of the subsystem, eg., "bus", "class", "devices"
+ * Returns a dlist of supported names or NULL if subsystem not supported
+ */
+struct dlist *sysfs_open_subsystem_list(unsigned char *name)
+{
+ unsigned char sysfs_path[SYSFS_PATH_MAX], *subsys_name = NULL;
+ struct sysfs_directory *dir = NULL, *cur = NULL;
+ struct dlist *list = NULL;
+
+ if (name == NULL)
+ return NULL;
+
+ if (sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX) != 0) {
+ dprintf("Error getting sysfs mount point\n");
+ return NULL;
+ }
+
+ strcat(sysfs_path, name);
+ dir = sysfs_open_directory(sysfs_path);
+ if (dir == NULL) {
+ dprintf("Error opening sysfs_directory at %s\n", sysfs_path);
+ return NULL;
+ }
+
+ if (sysfs_read_directory(dir) != 0) {
+ dprintf("Error reading sysfs_directory at %s\n", sysfs_path);
+ sysfs_close_directory(dir);
+ return NULL;
+ }
+
+ if (dir->subdirs != NULL) {
+ list = dlist_new_with_delete(SYSFS_NAME_LEN,
+ sysfs_del_name);
+ if (list == NULL) {
+ dprintf("Error creating list\n");
+ sysfs_close_directory(dir);
+ return NULL;
+ }
+
+ dlist_for_each_data(dir->subdirs, cur,
+ struct sysfs_directory) {
+ subsys_name = (char *)calloc(1, SYSFS_NAME_LEN);
+ strcpy(subsys_name, cur->name);
+ dlist_unshift(list, subsys_name);
+ }
+ }
+ sysfs_close_directory(dir);
+ return list;
+}
+
+
+/**
+ * sysfs_open_bus_devices_list: gets a list of all devices on "name" bus
+ * @name: name of the subsystem, eg., "pci", "scsi", "usb"
+ * Returns a dlist of supported names or NULL if subsystem not supported
+ */
+struct dlist *sysfs_open_bus_devices_list(unsigned char *name)
+{
+ unsigned char sysfs_path[SYSFS_PATH_MAX], *device_name = NULL;
+ struct sysfs_directory *dir = NULL;
+ struct sysfs_link *cur = NULL;
+ struct dlist *list = NULL;
+
+ if (name == NULL)
+ return NULL;
+
+ if (sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX) != 0) {
+ dprintf("Error getting sysfs mount point\n");
+ return NULL;
+ }
+
+ strcat(sysfs_path, SYSFS_BUS_DIR);
+ strcat(sysfs_path, "/");
+ strcat(sysfs_path, name);
+ strcat(sysfs_path, SYSFS_DEVICES_DIR);
+ dir = sysfs_open_directory(sysfs_path);
+ if (dir == NULL) {
+ dprintf("Error opening sysfs_directory at %s\n", sysfs_path);
+ return NULL;
+ }
+
+ if (sysfs_read_directory(dir) != 0) {
+ dprintf("Error reading sysfs_directory at %s\n", sysfs_path);
+ sysfs_close_directory(dir);
+ return NULL;
+ }
+
+ if (dir->links != NULL) {
+ list = dlist_new_with_delete(SYSFS_NAME_LEN,
+ sysfs_del_name);
+ if (list == NULL) {
+ dprintf("Error creating list\n");
+ sysfs_close_directory(dir);
+ return NULL;
+ }
+
+ dlist_for_each_data(dir->links, cur,
+ struct sysfs_link) {
+ device_name = (char *)calloc(1, SYSFS_NAME_LEN);
+ strcpy(device_name, cur->name);
+ dlist_unshift(list, device_name);
+ }
+ }
+ sysfs_close_directory(dir);
+ return list;
+}
+
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-14 01:48:48 +0000