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Diffstat (limited to 'toys/other/lsusb.c')
-rw-r--r--toys/other/lsusb.c47
1 files changed, 18 insertions, 29 deletions
diff --git a/toys/other/lsusb.c b/toys/other/lsusb.c
index 98b863ed..07886e8c 100644
--- a/toys/other/lsusb.c
+++ b/toys/other/lsusb.c
@@ -6,9 +6,11 @@ USE_LSUSB(NEWTOY(lsusb, NULL, TOYFLAG_USR|TOYFLAG_BIN))
config LSUSB
bool "lsusb"
- default n
+ default y
help
usage: lsusb
+
+ List USB hosts/devices.
*/
#include "toys.h"
@@ -17,38 +19,26 @@ static int list_device(struct dirtree *new)
{
FILE *file;
char *name;
- int busnum = 0;
- int devnum = 0;
- int pid = 0;
- int vid = 0;
- if (!new->parent)
- return DIRTREE_RECURSE;
- if (new->name[0] == '.')
- return 0;
+ int busnum = 0, devnum = 0, pid = 0, vid = 0;
+
+ if (!new->parent) return DIRTREE_RECURSE;
+ if (new->name[0] == '.') return 0;
name = dirtree_path(new, 0);
snprintf(toybuf, sizeof(toybuf), "%s/%s", name, "/uevent");
file = fopen(toybuf, "r");
- if (!file)
- return 0;
- if (!fgets(toybuf, sizeof(toybuf), file) || !strncmp(toybuf, "DEVTYPE=", 8)) {
+ if (file) {
+ int count = 0;
+
+ while (fgets(toybuf, sizeof(toybuf), file))
+ if (sscanf(toybuf, "BUSNUM=%u\n", &busnum)
+ || sscanf(toybuf, "DEVNUM=%u\n", &devnum)
+ || sscanf(toybuf, "PRODUCT=%x/%x/", &pid, &vid)) count++;
+
+ if (count == 3)
+ printf("Bus %03d Device %03d: ID %04x:%04x\n", busnum, devnum, pid, vid);
fclose(file);
- return 0;
- }
- while (fgets(toybuf, sizeof(toybuf), file)) {
- if (!strncmp(toybuf, "BUSNUM=", 7))
- busnum = atoi(&toybuf[7]);
- if (!strncmp(toybuf, "DEVNUM=", 7))
- devnum = atoi(&toybuf[7]);
- if (!strncmp(toybuf, "PRODUCT=", 8)) {
- char *pos = strchr(toybuf, '/');
- pid = xstrtoul(&toybuf[8], NULL, 16);
- if (pos)
- vid = xstrtoul(pos + 1, NULL, 16);
- }
}
- fclose(file);
-
- printf("Bus %03d Device %03d: ID %04x:%04x\n", busnum, devnum, pid, vid);
+ free(name);
return 0;
}
@@ -56,5 +46,4 @@ static int list_device(struct dirtree *new)
void lsusb_main(void)
{
dirtree_read("/sys/bus/usb/devices/", list_device);
- return;
}