[gentoo-commits] proj/sandbox:master commit in: libsandbox/

[Mike Frysinger]

commit:     63e816ad7731e40e34a7c766d895a6c6c9e8138f
Author:     Mike Frysinger <vapier <AT> gentoo <DOT> org>
AuthorDate: Sat Feb 23 02:29:49 2013 +0000
Commit:     Mike Frysinger <vapier <AT> gentoo <DOT> org>
CommitDate: Mon Feb 25 04:11:37 2013 +0000
URL:        http://git.overlays.gentoo.org/gitweb/?p=proj/sandbox.git;a=commit;h=63e816ad

libsandbox: handle ENOSYS w/process_vm_readv

If we have a newer glibc built against/running on an older kernel, the
func return ENOSYS at runtime.  Handle that.

Signed-off-by: Mike Frysinger <vapier <AT> gentoo.org>

---
 libsandbox/trace.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/libsandbox/trace.c b/libsandbox/trace.c
index c38ea12..32ad2d6 100644
--- a/libsandbox/trace.c
+++ b/libsandbox/trace.c
@@ -103,7 +103,12 @@ static char *do_peekstr(unsigned long lptr)
 	riov.iov_len = liov.iov_len = len;
 
 	while (1) {
-		process_vm_readv(trace_pid, &liov, 1, &riov, 1, 0);
+		if (process_vm_readv(trace_pid, &liov, 1, &riov, 1, 0) == -1) {
+			if (errno == ENOSYS)
+				break;
+			sb_ebort("ISE:do_peekstr: process_vm_readv() hates us: %s\n",
+				strerror(errno));
+		}
 
 		for (i = 0; i < liov.iov_len; ++i)
 			if (!((char *)liov.iov_base)[i])