The branch main has been updated by delphij: URL: https://cgit.FreeBSD.org/src/commit/?id=1fb3caee72241b9b4dacbfb0109c972a86d4401f
commit 1fb3caee72241b9b4dacbfb0109c972a86d4401f Author: Ricardo Branco <[email protected]> AuthorDate: 2024-01-03 20:32:47 +0000 Commit: Xin LI <[email protected]> CommitDate: 2024-01-04 09:00:23 +0000 tail: Do not trust st_size if it equals zero. PR: bin/276107 MFC after: 1 week --- usr.bin/tail/forward.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/usr.bin/tail/forward.c b/usr.bin/tail/forward.c index 010a36b4c793..a5303385a74f 100644 --- a/usr.bin/tail/forward.c +++ b/usr.bin/tail/forward.c @@ -102,7 +102,7 @@ forward(FILE *fp, const char *fn, enum STYLE style, off_t off, struct stat *sbp) case FBYTES: if (off == 0) break; - if (S_ISREG(sbp->st_mode)) { + if (S_ISREG(sbp->st_mode) && sbp->st_size > 0) { if (sbp->st_size < off) off = sbp->st_size; if (fseeko(fp, off, SEEK_SET) == -1) { @@ -134,7 +134,7 @@ forward(FILE *fp, const char *fn, enum STYLE style, off_t off, struct stat *sbp) } break; case RBYTES: - if (S_ISREG(sbp->st_mode)) { + if (S_ISREG(sbp->st_mode) && sbp->st_size > 0) { if (sbp->st_size >= off && fseeko(fp, -off, SEEK_END) == -1) { ierr(fn); @@ -151,7 +151,7 @@ forward(FILE *fp, const char *fn, enum STYLE style, off_t off, struct stat *sbp) return; break; case RLINES: - if (S_ISREG(sbp->st_mode)) + if (S_ISREG(sbp->st_mode) && sbp->st_size > 0) if (!off) { if (fseeko(fp, (off_t)0, SEEK_END) == -1) { ierr(fn);
