The branch stable/14 has been updated by des: URL: https://cgit.FreeBSD.org/src/commit/?id=37ceb8794c22d88a41e261d23d347bc7ac08b2c8
commit 37ceb8794c22d88a41e261d23d347bc7ac08b2c8 Author: Dag-Erling Smørgrav <[email protected]> AuthorDate: 2026-02-05 17:41:56 +0000 Commit: Dag-Erling Smørgrav <[email protected]> CommitDate: 2026-02-10 14:24:20 +0000 diff: Report I/O errors in Stone algorithm In the legacy Stone algorithm, we do a first pass over the files to check if they're identical before we start diffing them. That code would correctly set the exit status if an I/O error was encountered, but would not emit an error message. Do so. PR: 292198 MFC after: 1 week Sponsored by: Klara, Inc. Reviewed by: thj Differential Revision: https://reviews.freebsd.org/D55125 (cherry picked from commit f8c12e6e3874cdd353fb16785da6f4e7eb134cd9) --- usr.bin/diff/diffreg.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/usr.bin/diff/diffreg.c b/usr.bin/diff/diffreg.c index 954e0542b576..6ade8bfb8237 100644 --- a/usr.bin/diff/diffreg.c +++ b/usr.bin/diff/diffreg.c @@ -381,6 +381,10 @@ diffreg(char *file1, char *file2, int flags, int capsicum) break; default: /* error */ + if (ferror(f1)) + warn("%s", file1); + if (ferror(f2)) + warn("%s", file2); rval = D_ERROR; status |= 2; goto closem; @@ -474,9 +478,9 @@ files_differ(FILE *f1, FILE *f2, int flags) return (0); for (;;) { - i = fread(buf1, 1, sizeof(buf1), f1); - j = fread(buf2, 1, sizeof(buf2), f2); - if ((!i && ferror(f1)) || (!j && ferror(f2))) + if ((i = fread(buf1, 1, sizeof(buf1), f1)) == 0 && ferror(f1)) + return (-1); + if ((j = fread(buf2, 1, sizeof(buf2), f2)) == 0 && ferror(f2)) return (-1); if (i != j) return (1);
