diff options
| -rw-r--r-- | sys/src/cmd/tail.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sys/src/cmd/tail.c b/sys/src/cmd/tail.c index 572224749..e8717dc50 100644 --- a/sys/src/cmd/tail.c +++ b/sys/src/cmd/tail.c @@ -8,6 +8,7 @@ * the simple command tail -c, legal in v10, is illegal */ +vlong fend; long count; int anycount; int follow; @@ -111,7 +112,7 @@ main(int argc, char **argv) else if(units==LINES && origin==BEG) skip(); - if(follow && seekable) + if(follow && (seekable || fend == 0)) for(;;) { static Dir *sb0, *sb1; trunc(sb1, &sb0); @@ -368,5 +369,6 @@ usage(void) static int isseekable(int fd) { - return seek(fd, 0, 2) > 0 && seek(fd, 0, 0) == 0; + fend = seek(fd, 0, 2); + return fend > 0 && seek(fd, 0, 0) == 0; } |