5 files changed, 14 insertions, 17 deletions
diff --git a/toys/posix/cmp.c b/toys/posix/cmp.c
index 527fbfda..f4c34091 100644
--- a/toys/posix/cmp.c
+++ b/toys/posix/cmp.c
@@ -43,6 +43,8 @@ static void do_cmp(int fd, char *name)
     return;
   }
 
+  toys.exitval = 0;
+
   for (;;) {
     len1 = readall(TT.fd, toybuf, size);
     len2 = readall(fd, buf2, size);
@@ -54,11 +56,9 @@ static void do_cmp(int fd, char *name)
         if (toys.optflags & FLAG_l)
           printf("%ld %o %o\n", byte_no, toybuf[i], buf2[i]);
         else {
-          if (!(toys.optflags & FLAG_s)) {
+          if (!(toys.optflags & FLAG_s)) 
             printf("%s %s differ: char %ld, line %ld\n",
               TT.name, name, byte_no, line_no);
-            toys.exitval++;
-          }
           goto out;
         }
       }
@@ -79,6 +79,8 @@ out:
 
 void cmp_main(void)
 {
-  loopfiles_rw(toys.optargs, O_CLOEXEC, 0, toys.optflags&FLAG_s, do_cmp);
+  toys.exitval = 2;
+  loopfiles_rw(toys.optargs, O_CLOEXEC|(WARN_ONLY*!(toys.optflags&FLAG_s)), 0,
+    do_cmp);
 }
 
diff --git a/toys/posix/grep.c b/toys/posix/grep.c
index 6423ea6b..2fe6ac27 100644
--- a/toys/posix/grep.c
+++ b/toys/posix/grep.c
@@ -81,17 +81,12 @@ static void outline(char *line, char dash, char *name, long lcount, long bcount,
 static void do_grep(int fd, char *name)
 {
   struct double_list *dlb = 0;
-  FILE *file = fdopen(fd, "r");
+  FILE *file = xfdopen(fd, "r");
   long lcount = 0, mcount = 0, offset = 0, after = 0, before = 0;
   char *bars = 0;
 
   if (!fd) name = "(standard input)";
 
-  if (!file) {
-    perror_msg_raw(name);
-    return;
-  }
-
   // Loop through lines of input
   for (;;) {
     char *line = 0, *start;
@@ -368,5 +363,5 @@ void grep_main(void)
       if (!strcmp(*ss, "-")) do_grep(0, *ss);
       else dirtree_read(*ss, do_grep_r);
     }
-  } else loopfiles_rw(ss, O_RDONLY, 0, 1, do_grep);
+  } else loopfiles_rw(ss, O_RDONLY|WARN_ONLY, 0, do_grep);
 }
diff --git a/toys/posix/sed.c b/toys/posix/sed.c
index c62d2d10..744edf7b 100644
--- a/toys/posix/sed.c
+++ b/toys/posix/sed.c
@@ -1010,8 +1010,8 @@ void sed_main(void)
   TT.fdout = 1;
   TT.remember = xstrdup("");
 
-  // Inflict pattern upon input files
-  loopfiles_rw(args, O_RDONLY, 0, 0, do_sed);
+  // Inflict pattern upon input files. Long version because !O_CLOEXEC
+  loopfiles_rw(args, O_RDONLY|WARN_ONLY, 0, do_sed);
 
   if (!(toys.optflags & FLAG_i)) process_line(0, 0);
 
diff --git a/toys/posix/tail.c b/toys/posix/tail.c
index 787e116e..22b5ac6d 100644
--- a/toys/posix/tail.c
+++ b/toys/posix/tail.c
@@ -242,8 +242,8 @@ void tail_main(void)
     if ((TT.ffd = inotify_init()) < 0) perror_exit("inotify_init");
     TT.files = xmalloc(toys.optc*8);
   }
-  loopfiles_rw(args, O_RDONLY|(O_CLOEXEC*!(toys.optflags&FLAG_f)),
-    0, 0, do_tail);
+  loopfiles_rw(args, O_RDONLY|WARN_ONLY|(O_CLOEXEC*!(toys.optflags&FLAG_f)),
+    0, do_tail);
 
   if ((toys.optflags & FLAG_f) && TT.file_no) {
     int len, last_fd = TT.files[(TT.file_no-1)*2], i, fd;
diff --git a/toys/posix/tee.c b/toys/posix/tee.c
index d5591b67..6167c8ad 100644
--- a/toys/posix/tee.c
+++ b/toys/posix/tee.c
@@ -49,8 +49,8 @@ void tee_main(void)
 
   // Open output files
   loopfiles_rw(toys.optargs,
-    O_RDWR|O_CREAT|((toys.optflags & FLAG_a)?O_APPEND:O_TRUNC),
-    0666, 0, do_tee_open);
+    O_RDWR|O_CREAT|WARN_ONLY|((toys.optflags & FLAG_a)?O_APPEND:O_TRUNC),
+    0666, do_tee_open);
 
   for (;;) {
     struct fd_list *fdl;