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tee(1): explicitly check read(2) return value for 0 and -1

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This commit is contained in:
cheloha 2023-03-04 00:00:25 +00:00
parent d8920042b5
commit ce7941a337
1 changed files with 2 additions and 2 deletions
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4
usr.bin/tee/tee.c
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@ -1,4 +1,4 @@
/* $OpenBSD: tee.c,v 1.14 2021/12/13 18:33:23 cheloha Exp $ */
/* $OpenBSD: tee.c,v 1.15 2023/03/04 00:00:25 cheloha Exp $ */
/* $NetBSD: tee.c,v 1.5 1994/12/09 01:43:39 jtc Exp $ */
/*
@ -114,7 +114,7 @@ main(int argc, char *argv[])
buf = malloc(BSIZE);
if (buf == NULL)
err(1, NULL);
while ((rval = read(STDIN_FILENO, buf, BSIZE)) > 0) {
while ((rval = read(STDIN_FILENO, buf, BSIZE)) != 0 && rval != -1) {
SLIST_FOREACH(p, &head, next) {
for (n = 0; n < rval; n += wval) {
wval = write(p->fd, buf + n, rval - n);