lttng-tools: use absolute path to modprobe

Instead of relying on it being available in $PATH.

pkgs/development/tools/misc/lttng-tools/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, popt, libuuid, liburcu, lttngUst }:
+{ stdenv, fetchurl, popt, libuuid, liburcu, lttngUst, kmod }:
 
 stdenv.mkDerivation rec {
   name = "lttng-tools-2.3.0";
@@ -10,7 +10,10 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ popt libuuid liburcu lttngUst ];
 
-  patches = [ ./lttng-change-modprobe-path-from-sbin-modprobe-to-modprobe.patch ];
+  prePatch = ''
+    sed -e "s|/sbin/modprobe|${kmod}/sbin/modprobe|g" \
+        -i src/bin/lttng-sessiond/modprobe.c
+  '';
 
   meta = with stdenv.lib; {
     description = "Tracing tools (kernel + user space) for Linux";

pkgs/development/tools/misc/lttng-tools/lttng-change-modprobe-path-from-sbin-modprobe-to-modprobe.patch

@@ -1,53 +0,0 @@
-From daba2e936571a236817022b760d91c48b730c30b Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Bj=C3=B8rn=20Forsman?= <bjorn.forsman@gmail.com>
-Date: Tue, 9 Jul 2013 23:47:47 +0200
-Subject: [PATCH] Change modprobe path from "/sbin/modprobe" to "modprobe"
- (rely on PATH lookup)
-
----
- src/bin/lttng-sessiond/modprobe.c | 8 ++++----
- 1 file changed, 4 insertions(+), 4 deletions(-)
-
-diff --git a/src/bin/lttng-sessiond/modprobe.c b/src/bin/lttng-sessiond/modprobe.c
-index 7e06dad..4075efe 100644
---- a/src/bin/lttng-sessiond/modprobe.c
-+++ b/src/bin/lttng-sessiond/modprobe.c
-@@ -90,7 +90,7 @@ void modprobe_remove_lttng_control(void)
- 
- 	for (i = ARRAY_SIZE(kern_modules_control) - 1; i >= 0; i--) {
- 		ret = snprintf(modprobe, sizeof(modprobe),
--				"/sbin/modprobe -r -q %s",
-+				"modprobe -r -q %s",
- 				kern_modules_control[i].name);
- 		if (ret < 0) {
- 			PERROR("snprintf modprobe -r");
-@@ -125,7 +125,7 @@ void modprobe_remove_lttng_data(void)
- 
- 	for (i = ARRAY_SIZE(kern_modules_list) - 1; i >= 0; i--) {
- 		ret = snprintf(modprobe, sizeof(modprobe),
--				"/sbin/modprobe -r -q %s",
-+				"modprobe -r -q %s",
- 				kern_modules_list[i].name);
- 		if (ret < 0) {
- 			PERROR("snprintf modprobe -r");
-@@ -169,7 +169,7 @@ int modprobe_lttng_control(void)
- 
- 	for (i = 0; i < ARRAY_SIZE(kern_modules_control); i++) {
- 		ret = snprintf(modprobe, sizeof(modprobe),
--				"/sbin/modprobe %s%s",
-+				"modprobe %s%s",
- 				kern_modules_control[i].required ? "" : "-q ",
- 				kern_modules_control[i].name);
- 		if (ret < 0) {
-@@ -205,7 +205,7 @@ int modprobe_lttng_data(void)
- 
- 	for (i = 0; i < ARRAY_SIZE(kern_modules_list); i++) {
- 		ret = snprintf(modprobe, sizeof(modprobe),
--				"/sbin/modprobe %s%s",
-+				"modprobe %s%s",
- 				kern_modules_list[i].required ? "" : "-q ",
- 				kern_modules_list[i].name);
- 		if (ret < 0) {
--- 
-1.8.2.3
-