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libusb-sniff: Disable printing output of libusb function if env USBSNIFF_SKIP_* is set

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Pali Rohár committed 2012-09-22 10:20:49 +02:00
1 parent 40cd74c506
commit 805bafacef
1 file changed
+13
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src/libusb-sniff.c
+13
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@@ -19,6 +19,7 @@
/* compile: gcc libusb-sniff.c -o libusb-sniff.so -W -Wall -O2 -fPIC -ldl -shared -m32 */ /* compile: gcc libusb-sniff.c -o libusb-sniff.so -W -Wall -O2 -fPIC -ldl -shared -m32 */
/* usage: sudo USBSNIFF_WAIT=1 LD_PRELOAD=./libusb-sniff.so flasher-3.5 ... */ /* usage: sudo USBSNIFF_WAIT=1 LD_PRELOAD=./libusb-sniff.so flasher-3.5 ... */
/* usage: sudo USBSNIFF_SKIP_READ=1 USBSNIFF_SKIP_WRITE=1 LD_PRELOAD=./libusb-sniff.so flasher-3.5 ... */
#define _GNU_SOURCE #define _GNU_SOURCE
#include <stdio.h> #include <stdio.h>
@@ -69,6 +70,8 @@ int usb_bulk_write(usb_dev_handle * dev, int ep, const char * bytes, int size, i
if ( ! real_usb_bulk_write ) if ( ! real_usb_bulk_write )
real_usb_bulk_write = dlsym(RTLD_NEXT, "usb_bulk_write"); real_usb_bulk_write = dlsym(RTLD_NEXT, "usb_bulk_write");
if ( ! getenv("USBSNIFF_SKIP_WRITE") ) {
printf("\n==== usb_bulk_write (ep=%d size=%d timeout=%d) ====\n", ep, size, timeout); printf("\n==== usb_bulk_write (ep=%d size=%d timeout=%d) ====\n", ep, size, timeout);
dump_bytes(bytes, size); dump_bytes(bytes, size);
printf("====\n"); printf("====\n");
@@ -77,6 +80,8 @@ int usb_bulk_write(usb_dev_handle * dev, int ep, const char * bytes, int size, i
printf("Press ENTER"); fflush(stdout); getchar(); printf("Press ENTER"); fflush(stdout); getchar();
} }
}
return real_usb_bulk_write(dev, ep, bytes, size, timeout); return real_usb_bulk_write(dev, ep, bytes, size, timeout);
} }
@@ -91,6 +96,8 @@ int usb_bulk_read(usb_dev_handle * dev, int ep, char * bytes, int size, int time
ret = real_usb_bulk_read(dev, ep, bytes, size, timeout); ret = real_usb_bulk_read(dev, ep, bytes, size, timeout);
if ( ! getenv("USBSNIFF_SKIP_READ") ) {
printf("\n==== usb_bulk_read (ep=%d size=%d timeout=%d) ret = %d ====\n", ep, size, timeout, ret); printf("\n==== usb_bulk_read (ep=%d size=%d timeout=%d) ret = %d ====\n", ep, size, timeout, ret);
if ( ret > 0 ) { if ( ret > 0 ) {
dump_bytes(bytes, ret); dump_bytes(bytes, ret);
@@ -101,6 +108,8 @@ int usb_bulk_read(usb_dev_handle * dev, int ep, char * bytes, int size, int time
printf("Press ENTER"); fflush(stdout); getchar(); printf("Press ENTER"); fflush(stdout); getchar();
} }
}
return ret; return ret;
} }
@@ -115,6 +124,8 @@ int usb_control_msg(usb_dev_handle *dev, int requesttype, int request, int value
ret = real_usb_control_msg(dev, requesttype, request, value, index, bytes, size, timeout); ret = real_usb_control_msg(dev, requesttype, request, value, index, bytes, size, timeout);
if ( ! getenv("USBSNIFF_SKIP_CONTROL") ) {
printf("\n==== usb_control_msg(requesttype=%d, request=%d, value=%d, index=%d, size=%d, timeout=%d) ret = %d ====\n", requesttype, request, value, index, size, timeout, ret); printf("\n==== usb_control_msg(requesttype=%d, request=%d, value=%d, index=%d, size=%d, timeout=%d) ret = %d ====\n", requesttype, request, value, index, size, timeout, ret);
if ( ret > 0 ) { if ( ret > 0 ) {
dump_bytes(bytes, ret); dump_bytes(bytes, ret);
@@ -125,6 +136,8 @@ int usb_control_msg(usb_dev_handle *dev, int requesttype, int request, int value
printf("Press ENTER"); fflush(stdout); getchar(); printf("Press ENTER"); fflush(stdout); getchar();
} }
}
return ret; return ret;
} }