Rewrite -c and -b processing to shrink code and eliminate buffer overrun.

1 files changed, 4 insertions, 14 deletions

diff --git a/coreutils/cut.c b/coreutils/cut.c
index d852ab3be..efcb325df 100644
--- a/coreutils/cut.c
+++ b/coreutils/cut.c
@@ -108,20 +108,10 @@ static void cut_file(FILE *file)
         for (line = NULL; (line = get_line_from_file(file)) != NULL; free(line)) {
                 /* cut based on chars/bytes */
                 if (part == 'c' || part == 'b') {
-                        int i;
-                        /* a valid end position has been specified */
-                        if (endpos > 0) {
-                                for (i = startpos-1; i < endpos; i++) {
-                                        fputc(line[i], stdout);
-                                }
-                                fputc('\n', stdout);
-                        }
-                        /* otherwise, just go to the end of the line */
-                        else {
-                                for (i = startpos-1; line[i]; i++) {
-                                        fputc(line[i], stdout);
-                                }
-                        }
+                        chomp(line);
+                        if (0 < endpos && endpos < strlen(line))
+                                line[endpos] = '\0';
+                        puts(line + startpos - 1);
                 } 
                 /* cut based on fields */
                 else if (part == 'f') {