ncmixer

commit 249e4cada112bfa46ead548fd2630b3cc25719f5
parent 8dff41f76998907442cd05582fa57422c285eca2
Author: sin <sin@2f30.org>
Date:   Mon,  6 Jun 2016 14:42:48 +0100

Nuke inherited file descriptors

A trick is used to index directly with a file descriptor into the poll
array in the loop function.  If the parent process has leaked file
descriptors into ncmixer a possible out of bounds access can occur.

Diffstat:
M
ncmixer.c
 | 
10
++++++++++

1 file changed, 10 insertions(+), 0 deletions(-)
diff --git a/ncmixer.c b/ncmixer.c
@@ -490,6 +490,15 @@ curses_exit(void)
 	endwin();
 }
 
+void
+nuke_fds(void)
+{
+	int i;
+
+	for (i = 3; i < getdtablesize(); i++)
+		close(i);
+}
+
 int
 main(int argc, char *argv[])
 {
@@ -497,6 +506,7 @@ main(int argc, char *argv[])
 		outputs[0].name = argv[1];
 	if (argc > 2)
 		outputs[1].name = argv[2];
+	nuke_fds();
 	curses_init();
 	erase();
 	draw();