From 8067b6fb73fadebad4671a096b9b07c8dae9c3f8 Mon Sep 17 00:00:00 2001 From: Jim Meyering Date: Wed, 29 Dec 1993 06:13:37 +0000 Subject: . --- lib/safe-read.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 lib/safe-read.c (limited to 'lib/safe-read.c') diff --git a/lib/safe-read.c b/lib/safe-read.c new file mode 100644 index 000000000..d915d4e7c --- /dev/null +++ b/lib/safe-read.c @@ -0,0 +1,31 @@ +/* Read LEN bytes at PTR from descriptor DESC, retrying if necessary. + Return the actual number of bytes read, zero for EOF, or negative + for an error. */ + +int +safe_read (desc, ptr, len) + int desc; + char *ptr; + int len; +{ + int n_remaining; + + n_remaining = len; + while (n_remaining > 0) + { + int n_chars = read (desc, ptr, n_remaining); + if (n_chars < 0) + { +#ifdef EINTR + if (errno == EINTR) + continue; +#endif + return n_chars; + } + if (n_chars == 0) + break; + ptr += n_chars; + n_remaining -= n_chars; + } + return len - n_remaining; +} -- cgit v1.2.3-54-g00ecf