From: Pierre-Marc Fournier <pierre-marc.fournier@polymtl.ca>
Date: Fri, 25 Sep 2009 16:03:06 +0000 (-0400)
Subject: libinterfork: add and execve override
X-Git-Tag: v1.9.1~905
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=97b042a3085a90b776471390a79a4e9dc02b75e9;p=lttng-ust.git

libinterfork: add and execve override
---

diff --git a/libinterfork/interfork.c b/libinterfork/interfork.c
index 81f896e5..cfdd2c47 100644
--- a/libinterfork/interfork.c
+++ b/libinterfork/interfork.c
@@ -22,6 +22,7 @@
 #include "share/usterr.h"
 
 extern void ust_fork(void);
+extern void ust_potential_exec(void);
 
 pid_t fork(void)
 {
@@ -44,3 +45,24 @@ pid_t fork(void)
 
 	return retval;
 }
+
+int execve(const char *filename, char *const argv[], char *const envp[])
+{
+	static int (*plibc_func)(const char *filename, char *const argv[], char *const envp[]) = NULL;
+
+	pid_t retval;
+
+	if(plibc_func == NULL) {
+		plibc_func = dlsym(RTLD_NEXT, "execve");
+		if(plibc_func == NULL) {
+			fprintf(stderr, "libcwrap: unable to find execve\n");
+			return -1;
+		}
+	}
+
+	ust_potential_exec();
+
+	retval = plibc_func(filename, argv, envp);
+
+	return retval;
+}