Add error handling when gadget_read_buf return NULL.
If read of string fails, the string should be set as empty.
Signed-off-by: Krzysztof Opasiak <k.opasiak@xxxxxxxxxxx>
---
Changes since v1:
- Remove additional check of p variable
src/gadget.c | 23 +++++++++++++++++------
1 file changed, 17 insertions(+), 6 deletions(-)
diff --git a/src/gadget.c b/src/gadget.c
index f613c3e..d225af0 100644
--- a/src/gadget.c
+++ b/src/gadget.c
@@ -121,11 +121,18 @@ static int gadget_read_int(char *path, char *name, char *file, int base)
static void gadget_read_string(char *path, char *name, char *file, char *buf)
{
- char *p;
+ char *p = NULL;
+
+ p = gadget_read_buf(path, name, file, buf);
+ //check whether read was successful
+ if (p != NULL) {
+ if ((p = strchr(buf, '\n')) != NULL)
+ *p = '\0';
+ } else {
+ //Set this as empty string
+ *buf = '\0';
+ }
- gadget_read_buf(path, name, file, buf);
- if ((p = strchr(buf, '\n')) != NULL)
- *p = '\0';
}
static void gadget_write_buf(char *path, char *name, char *file, char *buf)
@@ -185,10 +192,14 @@ static void gadget_parse_function_attrs(struct function *f)
case F_RNDIS:
gadget_read_string(f->path, f->name, "dev_addr", str_addr);
addr = ether_aton(str_addr);
- memcpy(&f->attr.net.dev_addr, addr, 6);
+ if (addr)
+ memcpy(&f->attr.net.dev_addr, addr, sizeof(struct ether_addr));
+
gadget_read_string(f->path, f->name, "host_addr", str_addr);
addr = ether_aton(str_addr);
- memcpy(&f->attr.net.host_addr, addr, 6);
+ if(addr)
+ memcpy(&f->attr.net.host_addr, addr, sizeof(struct ether_addr));
+
gadget_read_string(f->path, f->name, "ifname", f->attr.net.ifname);
f->attr.net.qmult = gadget_read_dec(f->path, f->name, "qmult");
break;
--
1.7.9.5
--
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