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-rw-r--r--namedev.c228
-rw-r--r--test/udev-test.pl10
2 files changed, 158 insertions, 80 deletions
diff --git a/namedev.c b/namedev.c
index f138fe9769..cd38f25cb0 100644
--- a/namedev.c
+++ b/namedev.c
@@ -41,6 +41,8 @@
#include "libsysfs/libsysfs.h"
#include "klibc_fixups.h"
+static struct sysfs_attribute *find_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, char *attr);
+
LIST_HEAD(config_device_list);
LIST_HEAD(perm_device_list);
@@ -168,7 +170,46 @@ static char *get_default_group(void)
return default_group_str;
}
-static void apply_format(struct udevice *udev, unsigned char *string)
+/* extract possible {attr} and move str behind it */
+static char *get_format_attribute(char **str)
+{
+ char *pos;
+ char *attr = NULL;
+
+ if (*str[0] == '{') {
+ pos = strchr(*str, '}');
+ if (pos == NULL) {
+ dbg("missing closing brace for format");
+ return NULL;
+ }
+ pos[0] = '\0';
+ attr = *str+1;
+ *str = pos+1;
+ dbg("attribute='%s', str='%s'", attr, *str);
+ }
+ return attr;
+}
+
+/* extract possible format length and move str behind it*/
+static int get_format_len(char **str)
+{
+ int num;
+ char *tail;
+
+ if (isdigit(*str[0])) {
+ num = (int) strtoul(*str, &tail, 10);
+ if (tail != NULL) {
+ *str = tail;
+ dbg("format length=%i", num);
+ return num;
+ } else {
+ dbg("format parsing error '%s'", *str);
+ }
+ }
+ return -1;
+}
+
+static void apply_format(struct udevice *udev, unsigned char *string, struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device)
{
char temp[NAME_SIZE];
char temp1[NAME_SIZE];
@@ -176,87 +217,100 @@ static void apply_format(struct udevice *udev, unsigned char *string)
char *pos;
char *pos2;
char *pos3;
+ char *attr;
int num;
+ char c;
+ struct sysfs_attribute *tmpattr;
pos = string;
+
while (1) {
- num = 0;
pos = strchr(pos, '%');
-
- if (pos) {
+ if (pos != NULL) {
pos[0] = '\0';
tail = pos+1;
- if (isdigit(tail[0])) {
- num = (int) strtoul(&pos[1], &tail, 10);
- if (tail == NULL) {
- dbg("format parsing error '%s'", pos+1);
- break;
- }
- }
+ num = get_format_len(&tail);
+ c = tail[0];
strfieldcpy(temp, tail+1);
+ tail = temp;
+ } else {
+ break;
+ }
+ dbg("format=%c, string='%s', tail='%s'",c , string, tail);
- switch (tail[0]) {
- case 'b':
- if (strlen(udev->bus_id) == 0)
- break;
- strcat(pos, udev->bus_id);
- dbg("substitute bus_id '%s'", udev->bus_id);
+ attr = get_format_attribute(&tail);
+
+ switch (c) {
+ case 'b':
+ if (strlen(udev->bus_id) == 0)
break;
- case 'k':
- if (strlen(udev->kernel_name) == 0)
- break;
- strcat(pos, udev->kernel_name);
- dbg("substitute kernel name '%s'", udev->kernel_name);
+ strcat(pos, udev->bus_id);
+ dbg("substitute bus_id '%s'", udev->bus_id);
+ break;
+ case 'k':
+ if (strlen(udev->kernel_name) == 0)
break;
- case 'n':
- if (strlen(udev->kernel_number) == 0)
- break;
- strcat(pos, udev->kernel_number);
- dbg("substitute kernel number '%s'", udev->kernel_number);
+ strcat(pos, udev->kernel_name);
+ dbg("substitute kernel name '%s'", udev->kernel_name);
+ break;
+ case 'n':
+ if (strlen(udev->kernel_number) == 0)
break;
- case 'm':
- sprintf(pos, "%u", udev->minor);
- dbg("substitute minor number '%u'", udev->minor);
+ strcat(pos, udev->kernel_number);
+ dbg("substitute kernel number '%s'", udev->kernel_number);
break;
+ case 'm':
+ sprintf(pos, "%u", udev->minor);
+ dbg("substitute minor number '%u'", udev->minor);
+ break;
case 'M':
- sprintf(pos, "%u", udev->major);
- dbg("substitute major number '%u'", udev->major);
+ sprintf(pos, "%u", udev->major);
+ dbg("substitute major number '%u'", udev->major);
+ break;
+ case 'c':
+ if (strlen(udev->program_result) == 0)
break;
- case 'c':
- if (strlen(udev->program_result) == 0)
- break;
- if (num) {
- /* get part of return string */
- strncpy(temp1, udev->program_result, sizeof(temp1));
- pos2 = temp1;
- while (num) {
- num--;
- pos3 = strsep(&pos2, " ");
- if (pos3 == NULL) {
- dbg("requested part of result string not found");
- break;
- }
- }
- if (pos3) {
- strcat(pos, pos3);
- dbg("substitute part of result string '%s'", pos3);
+ if (num > 0) {
+ strncpy(temp1, udev->program_result, sizeof(temp1));
+ pos2 = temp1;
+ while (num) {
+ num--;
+ pos3 = strsep(&pos2, " ");
+ if (pos3 == NULL) {
+ dbg("requested part of result string not found");
+ break;
}
- } else {
- strcat(pos, udev->program_result);
- dbg("substitute result string '%s'", udev->program_result);
}
- break;
- case '%':
- strcat(pos, "%");
- pos++;
- break;
- default:
- dbg("unknown substitution type '%%%c'", pos[1]);
- break;
+ if (pos3) {
+ strcat(pos, pos3);
+ dbg("substitute part of result string '%s'", pos3);
+ }
+ } else {
+ strcat(pos, udev->program_result);
+ dbg("substitute result string '%s'", udev->program_result);
}
- strcat(string, temp);
- } else
break;
+ case 's':
+ if (attr != NULL) {
+ tmpattr = find_sysfs_attribute(class_dev, sysfs_device, attr);
+ if (tmpattr == NULL) {
+ dbg("sysfa attribute '%s' not found", attr);
+ break;
+ }
+ strcpy(pos, tmpattr->value);
+ dbg("substitute sysfs value '%s'", tmpattr->value);
+ } else {
+ dbg("missing attribute");
+ }
+ break;
+ case '%':
+ strcat(pos, "%");
+ break;
+ default:
+ dbg("unknown substitution type '%%%c'", c);
+ break;
+ }
+ strcat(pos, tail);
}
}
@@ -422,32 +476,46 @@ static int execute_program(char *path, char *value, int len)
return retval;
}
-static int compare_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, struct sysfs_pair *pair)
+static struct sysfs_attribute *find_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, char *attr)
{
struct sysfs_attribute *tmpattr = NULL;
char *c;
- if ((pair == NULL) || (pair->file[0] == '\0') || (pair->value == '\0'))
- return -ENODEV;
-
- dbg("look for device attribute '%s'", pair->file);
+ dbg("look for device attribute '%s'", attr);
/* try to find the attribute in the class device directory */
- tmpattr = sysfs_get_classdev_attr(class_dev, pair->file);
+ tmpattr = sysfs_get_classdev_attr(class_dev, attr);
if (tmpattr)
- goto label_found;
+ goto attr_found;
/* look in the class device directory if present */
if (sysfs_device) {
- tmpattr = sysfs_get_device_attr(sysfs_device, pair->file);
+ tmpattr = sysfs_get_device_attr(sysfs_device, attr);
if (tmpattr)
- goto label_found;
+ goto attr_found;
}
- return -ENODEV;
-label_found:
- c = tmpattr->value + strlen(tmpattr->value)-1;
- if (*c == '\n')
- *c = 0x00;
+ return NULL;
+
+attr_found:
+ c = strchr(tmpattr->value, '\n');
+ if (c != NULL)
+ c[0] = '\0';
+
+ dbg("found attribute '%s'", tmpattr->path);
+ return tmpattr;
+}
+
+static int compare_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, struct sysfs_pair *pair)
+{
+ struct sysfs_attribute *tmpattr;
+
+ if ((pair == NULL) || (pair->file[0] == '\0') || (pair->value == '\0'))
+ return -ENODEV;
+
+ tmpattr = find_sysfs_attribute(class_dev, sysfs_device, pair->file);
+ if (tmpattr == NULL)
+ return -ENODEV;
+
dbg("compare attribute '%s' value '%s' with '%s'",
pair->file, tmpattr->value, pair->value);
if (strcmp_pattern(pair->value, tmpattr->value) != 0)
@@ -658,7 +726,7 @@ static int match_rule(struct config_device *dev, struct sysfs_class_device *clas
/* execute external program */
if (dev->program[0] != '\0') {
dbg("check " FIELD_PROGRAM);
- apply_format(udev, dev->program);
+ apply_format(udev, dev->program, class_dev, sysfs_device);
if (execute_program(dev->program, udev->program_result, NAME_SIZE) != 0) {
dbg(FIELD_PROGRAM " returned nozero");
goto try_parent;
@@ -750,8 +818,8 @@ int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *ud
found:
/* substitute placeholder */
- apply_format(udev, udev->name);
- apply_format(udev, udev->symlink);
+ apply_format(udev, udev->name, class_dev, sysfs_device);
+ apply_format(udev, udev->symlink, class_dev, sysfs_device);
done:
perm = find_perm(udev->name);
diff --git a/test/udev-test.pl b/test/udev-test.pl
index 62a2bb327b..cbe110f797 100644
--- a/test/udev-test.pl
+++ b/test/udev-test.pl
@@ -194,6 +194,16 @@ BUS="scsi", PLACE="0:0:0:0", NAME="Major:%M:minor:%m:kernelnumber:%n:bus:%b"
EOF
},
{
+ desc => "sustitution of sysfs value (%s{file})",
+ subsys => "block",
+ devpath => "block/sda",
+ expected => "disk-IBM-ESXS-sda" ,
+ conf => <<EOF
+BUS="scsi", SYSFS_vendor="IBM-ESXS", NAME="disk-%s{vendor}-%k"
+KERNEL="ttyUSB0", NAME="visor"
+EOF
+ },
+ {
desc => "program result substitution",
subsys => "block",
devpath => "block/sda/sda3",
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-25 04:52:22 +0000