shell nits

fix Regehr complaint

1 files changed, 2 insertions, 3 deletions

diff --git a/sh.c b/sh.c
index 16e325b..3ac6f5b 100644
--- a/sh.c
+++ b/sh.c
@@ -147,7 +147,7 @@ main(void)
   static char buf[100];
   int fd;
   
-  // Assumes three file descriptors open.
+  // Ensure that three file descriptors are open.
   while((fd = open("console", O_RDWR)) >= 0){
     if(fd >= 3){
       close(fd);
@@ -158,8 +158,7 @@ main(void)
   // Read and run input commands.
   while(getcmd(buf, sizeof(buf)) >= 0){
     if(buf[0] == 'c' && buf[1] == 'd' && buf[2] == ' '){
-      // Clumsy but will have to do for now.
-      // Chdir has no effect on the parent if run in the child.
+      // Chdir must be called by the parent, not the child.
       buf[strlen(buf)-1] = 0;  // chop \n
       if(chdir(buf+3) < 0)
         printf(2, "cannot cd %s\n", buf+3);