--- cdrtools-2.01a37/cdrecord/cdrecord.c.skipcheck_priv	2004-12-14 00:00:12 +0300

+++ cdrtools-2.01a37/cdrecord/cdrecord.c	2005-01-05 12:24:06 +0300

@@ -242,7 +242,7 @@

 LOCAL	void	print_wrmodes	__PR((cdr_t *dp));

 LOCAL	BOOL	check_wrmode	__PR((cdr_t *dp, int wmode, int tflags));

 LOCAL	void	set_wrmode	__PR((cdr_t *dp, int wmode, int tflags));

-LOCAL	void	linuxcheck	__PR((void));

+LOCAL	BOOL	linuxcheck	__PR((void));

 struct exargs {

 	SCSI	*scgp;

@@ -465,8 +465,10 @@

 	}

 	/*

 	 * XXX Below this point we do not need root privilleges anymore.

+	 *

+	 * XXX Skip this on Linux kernel >= 2.6.9

 	 */

-	if (geteuid() != getuid()) {	/* AIX does not like to do this */

+	if (geteuid() != getuid() && !linuxcheck()) {	/* AIX does not like to do this */

 					/* If we are not root		*/

 #ifdef	HAVE_SETREUID

 		if (setreuid(-1, getuid()) < 0)

@@ -982,8 +984,10 @@

 		 * Note that we need to find a more general way that works

 		 * even on OS that do not support getreuid() which is *BSD

 		 * and SUSv3 only.

+		 *

+		 * XXX Skip this on Linux kernel >= 2.6.9

 		 */

-		if (oeuid != getuid()) {

+		if (oeuid != getuid() && !linuxcheck()) {

 			if (setreuid(-1, oeuid) < 0)

 				errmsg("Could set back effective uid.\n");

 		}

@@ -1000,8 +1004,10 @@

 #if defined(USE_POSIX_PRIORITY_SCHEDULING) && defined(HAVE_SETREUID)

 		/*

 		 * XXX Below this point we never need root privilleges anymore.

+		 *

+		 * XXX Skip this on Linux kernel >= 2.6.9

 		 */

-		if (geteuid() != getuid()) {	/* AIX does not like to do this */

+		if (geteuid() != getuid() && !linuxcheck()) {	/* AIX does not like to do this */

 						/* If we are not root		*/

 			if (setreuid(-1, getuid()) < 0)

 				comerr("Panic cannot set back effective uid.\n");

@@ -4619,3 +4625,37 @@

 	}

 	dsp->ds_wrmode = WM_NONE;

 }

+/*

+ * Kludge for checking linux kernel version

+ * enabling this hack only for >= 2.6.9 kernel

+ *

+ */

+#if    defined(linux) || defined(__linux) || defined(__linux__)

+#ifdef HAVE_UNAME

+#include <sys/utsname.h>

+#endif

+#endif

+

+LOCAL BOOL

+linuxcheck()

+{

+#if    defined(linux) || defined(__linux) || defined(__linux__)

+#ifdef HAVE_UNAME

+	static struct utsname un;

+	int a=0, b=0, c=0, n;

+

+	uname(&un);

+	n=sscanf(un.release, "%d.%d.%d", &a, &b, &c);

+	if (n == 3) {

+		if (a == 2 && b == 6 && c >= 9 ) { 

+			errmsgno(EX_BAD,

+			"Warning: Linux kernel version is %d.%d.%d\n", a, b, c);

+			errmsgno(EX_BAD,

+			"Enabling compatibility hack!\n");

+			return (TRUE);

+		}

+	}

+#endif

+	return (FALSE);

+#endif

+}