From 68622a02adfa7ebd3a195667d3fbf8e1f10ca93f Mon Sep 17 00:00:00 2001 From: "Markus F.X.J. Oberhumer" Date: Thu, 15 Apr 2021 07:43:13 +0200 Subject: util: introduce safe versions of read & write that handle interrupted systems calls. --- util.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'util.c') diff --git a/util.c b/util.c index 42e3d98..611d4b5 100644 --- a/util.c +++ b/util.c @@ -368,3 +368,23 @@ int bfs_minor(dev_t dev) { return dev & 0xFF; #endif } + +ssize_t safe_read(int fd, void *buf, size_t nbytes) { + for (;;) { + ssize_t ret = read(fd, buf, nbytes); + if (ret < 0 && errno == EINTR) { + continue; + } + return ret; + } +} + +ssize_t safe_write(int fd, const void *buf, size_t nbytes) { + for (;;) { + ssize_t ret = write(fd, buf, nbytes); + if (ret < 0 && errno == EINTR) { + continue; + } + return ret; + } +} -- cgit v1.2.3