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tail: fix "tail -F" file rotation detection

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When checking if the newly opened file is the same as the old one,
we need to fstat() the new file descriptor, not the old one again.

Reviewed by:	glebius
Sponsored by:	Netflix
This commit is contained in:
Chuck Silvers 2021-02-01 16:21:14 -08:00
parent 1912d2b15e
commit 7787e7eed9
1 changed files with 1 additions and 1 deletions
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2
usr.bin/tail/forward.c
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@ -367,7 +367,7 @@ follow(file_info_t *files, enum STYLE style, off_t off)
continue; continue;
ftmp = fileargs_fopen(fa, file->file_name, "r"); ftmp = fileargs_fopen(fa, file->file_name, "r");
if (ftmp == NULL || if (ftmp == NULL ||
fstat(fileno(file->fp), &sb2) == -1) { fstat(fileno(ftmp), &sb2) == -1) {
if (errno != ENOENT) if (errno != ENOENT)
ierr(file->file_name); ierr(file->file_name);
show(file); show(file);