ref: eed487167489ee16dd16effe9ebff9a5086ffc70
parent: 2c0490a26ed0565d5e69c88e64c8b185ecab0947
author: cinap_lenrek <cinap_lenrek@felloff.net>
date: Tue Mar 11 03:03:15 EDT 2014
exportfs: avoid closing netfd in filter() netfd is initially zero (stdin), when filter() closes fd0, fd0 is free to be reused. this causes problems with openmount() that assumes sfd being >2. instead, we dup the our pipe end over netfd, and close the pipe.
--- a/sys/src/cmd/exportfs/exportfs.c
+++ b/sys/src/cmd/exportfs/exportfs.c
@@ -927,10 +927,11 @@
exec(file, argv);
fatal("filter: exec; %r");default:
- close(fd);
+ dup(p[1], fd);
close(p[0]);
+ close(p[1]);
}
- return p[1];
+ return fd;
}
static void