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| author | Bartosz Golaszewski | 2013-10-14 20:11:55 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2013-10-16 15:02:50 +0200 |
| commit | 64938011f3ba06a8f425926397172dc361bce851 (patch) | |
| tree | d3e406ab6e54d9235b6f7e9e03534d3ef064260a /coreutils | |
| parent | 840ef17f63c85044c15d9a38a13c6539e26dfc31 (diff) | |
| download | busybox-64938011f3ba06a8f425926397172dc361bce851.zip busybox-64938011f3ba06a8f425926397172dc361bce851.tar.gz | |
tail compat: fix header printing for tail -f
Makes tail -f for multiple files display the header only if another (ie. not
currently displayed) file changed.
Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'coreutils')
| -rw-r--r-- | coreutils/tail.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/coreutils/tail.c b/coreutils/tail.c index 07c71ca..eab502b 100644 --- a/coreutils/tail.c +++ b/coreutils/tail.c @@ -105,6 +105,7 @@ int tail_main(int argc, char **argv) int *fds; const char *fmt; + int prev_fd; INIT_G(); @@ -309,6 +310,7 @@ int tail_main(int argc, char **argv) xwrite(STDOUT_FILENO, tailbuf, taillen); } } while (++i < nfiles); + prev_fd = fds[i-1]; tailbuf = xrealloc(tailbuf, BUFSIZ); @@ -365,9 +367,10 @@ int tail_main(int argc, char **argv) nread = tail_read(fd, tailbuf, BUFSIZ); if (nread <= 0) break; - if (fmt) { + if (fmt && (fd != prev_fd)) { tail_xprint_header(fmt, filename); fmt = NULL; + prev_fd = fd; } xwrite(STDOUT_FILENO, tailbuf, nread); } |