busybox-1.19.2-tail.patch

   1 --- busybox-1.19.2/coreutils/tail.c
   2 +++ busybox-1.19.2-tail/coreutils/tail.c
   3 @@ -203,7 +203,7 @@ int tail_main(int argc, char **argv)
   4                 int fd = fds[i];
   5
   6                 if (ENABLE_FEATURE_FANCY_TAIL && fd < 0)
   7 -                       continue; /* may happen with -E */
   8 +                       continue; /* may happen with -F */
   9
  10                 if (nfiles > header_threshhold) {
  11                         tail_xprint_header(fmt, argv[i]);
  12 @@ -252,14 +252,14 @@ int tail_main(int argc, char **argv)
  13                  * Used only by +N code ("start from Nth", 1-based): */
  14                 seen = 1;
  15                 newlines_seen = 0;
  16 -               while ((nread = tail_read(fd, buf, tailbufsize-taillen)) > 0) {
  17 +               while ((nread = tail_read(fd, buf, tailbufsize - taillen)) > 0) {
  18                         if (G.from_top) {
  19                                 int nwrite = nread;
  20                                 if (seen < count) {
  21                                         /* We need to skip a few more bytes/lines */
  22                                         if (COUNT_BYTES) {
  23                                                 nwrite -= (count - seen);
  24 -                                               seen = count;
  25 +                                               seen += nread;
  26                                         } else {
  27                                                 char *s = buf;
  28                                                 do {
  29 --- busybox-1.19.2/testsuite/tail.tests
  30 +++ busybox-1.19.2-tail/testsuite/tail.tests
  31 @@ -14,4 +14,12 @@ testing "tail: +N with N > file length"
  32         "0\n" \
  33         "" "qw"
  34
  35 +testing "tail: -c +N with largish N" \
  36 +       "
  37 +       dd if=/dev/zero bs=16k count=1 2>/dev/null | tail -c +8200 | wc -c;
  38 +       dd if=/dev/zero bs=16k count=1 2>/dev/null | tail -c +8208 | wc -c;
  39 +       " \
  40 +       "8185\n8177\n" \
  41 +       "" ""
  42 +
  43  exit $FAILCOUNT