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[PATCH] udevinfo symlink reverse query

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Thanks to Olaf Hering <olh@suse.de> for this patch. It's possible now to
feed the -n option of udevinfo with a symlink.

I've also added a 'all' attribute, but no more text, it's all in the
included man page :)
This commit is contained in:
kay.sievers@vrfy.org 2004-03-01 23:47:59 -08:00 committed by Greg KH
parent 97853b4f40
commit 8ea84a8a78
3 changed files with 35 additions and 6 deletions
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21
udevdb.c
View File

@ -27,6 +27,7 @@
#define _KLIBC_HAS_ARCH_SIG_ATOMIC_T
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <string.h>
#include <sys/stat.h>
@ -178,13 +179,29 @@ static int find_found;
static int find_device_by_name(char *path, struct udevice *dev)
{
int l, i, j;
if (strncmp(dev->name, find_name, sizeof(dev->name)) == 0) {
memcpy(find_dev, dev, sizeof(*find_dev));
strfieldcpy(find_path, path);
memcpy(find_dev, dev, sizeof(struct udevice));
strnfieldcpy(find_path, path, NAME_SIZE);
find_found = 1;
/* stop search */
return 1;
}
/* look for matching symlink*/
l = strlen(dev->symlink);
if (!l)
return 0;
i = j = 0;
do {
j = strcspn(&dev->symlink[i], " ");
if (j && strncmp(&dev->symlink[i], find_name, j) == 0) {
memcpy(find_dev, dev, sizeof(struct udevice));
strnfieldcpy(find_path, path, NAME_SIZE);
find_found = 1;
return 1;
}
i = i + j + 1;
} while (i < l);
return 0;
}

4
udevinfo.8
View File

@ -28,13 +28,13 @@ Query the database for specified value of a created device node.
.RB Needs " \-p " or " \-n " specified.
.br
Valid types are:
.BR name ", " symlink ", " mode " ," owner " , " group " or " path.
.BR name ", " symlink ", " mode " ," owner " , " group " , " path " or " all.
.TP
.BI \-p " sysfs_path"
Specify the sysfs path of the device to query.
.TP
.BI \-n " name"
Specify the name of the node for the device to query.
Specify the name of the node or the symlink for the device to query.
.TP
.B \-a
Print all

16
udevinfo.c
View File

@ -122,7 +122,8 @@ enum query_type {
SYMLINK,
MODE,
OWNER,
GROUP
GROUP,
ALL
};
static int print_device_chain(const char *path)
@ -258,6 +259,11 @@ static int process_options(void)
break;
}
if (strcmp(optarg, "all") == 0) {
query = ALL;
break;
}
printf("unknown query type\n");
exit(1);
@ -366,6 +372,10 @@ print:
strfieldcpy(result, path);
break;
case ALL:
print_record(path, &dev);
goto exit;
default:
goto exit;
}
@ -406,8 +416,10 @@ help:
" 'owner' of node\n"
" 'group' of node\n"
" 'path' sysfs device path\n"
" 'all' all values\n"
"\n"
" -p PATH sysfs device path used for query or chain\n"
" -n NAME node name used for query\n"
" -n NAME node/symlink name used for query\n"
"\n"
" -r print udev root\n"
" -a print all SYSFS_attributes along the device chain\n"