Re: mmap diff for patch(1)

[Michael W. Bombardieri]

Sorry, let me try that again... Forgot to clean up file descriptor ifd.


Index: inp.c
===================================================================
RCS file: /usr/src/cvs/src/usr.bin/patch/inp.c,v
retrieving revision 1.35
diff -u -r1.35 inp.c
--- inp.c       27 Oct 2009 23:59:41 -0000      1.35
+++ inp.c       11 Nov 2011 06:51:13 -0000
@@ -243,6 +243,10 @@
        if ((ifd = open(filename, O_RDONLY)) < 0)
                pfatal("can't open file %s", filename);
 
+       if (i_size == 0) {
+               close(ifd);
+               return true;
+       }
        i_womp = mmap(NULL, i_size, PROT_READ, MAP_PRIVATE, ifd, 0);
        if (i_womp == MAP_FAILED) {
                perror("mmap failed");