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authorbigbiff bigbiff <bigbiff@teamw.in>2013-02-23 02:55:50 +0100
committerbigbiff bigbiff <bigbiff@teamw.in>2013-02-25 15:06:46 +0100
commite60683a0d553b6488c564863f4e48954944fb0f8 (patch)
tree9364f97cb88b7c1359f5f06dfb32150a78168c31 /libblkid/all-io.h
parentFix building of updater for 4.2 environment (diff)
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Diffstat (limited to '')
-rw-r--r--libblkid/all-io.h82
1 files changed, 82 insertions, 0 deletions
diff --git a/libblkid/all-io.h b/libblkid/all-io.h
new file mode 100644
index 000000000..424ab7d3f
--- /dev/null
+++ b/libblkid/all-io.h
@@ -0,0 +1,82 @@
+/*
+ * No copyright is claimed. This code is in the public domain; do with
+ * it what you wish.
+ *
+ * Written by Karel Zak <kzak@redhat.com>
+ * Petr Uzel <petr.uzel@suse.cz>
+ */
+
+#ifndef UTIL_LINUX_ALL_IO_H
+#define UTIL_LINUX_ALL_IO_H
+
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "c.h"
+
+static inline int write_all(int fd, const void *buf, size_t count)
+{
+ while (count) {
+ ssize_t tmp;
+
+ errno = 0;
+ tmp = write(fd, buf, count);
+ if (tmp > 0) {
+ count -= tmp;
+ if (count)
+ buf = (void *) ((char *) buf + tmp);
+ } else if (errno != EINTR && errno != EAGAIN)
+ return -1;
+ if (errno == EAGAIN) /* Try later, *sigh* */
+ usleep(10000);
+ }
+ return 0;
+}
+
+static inline int fwrite_all(const void *ptr, size_t size,
+ size_t nmemb, FILE *stream)
+{
+ while (nmemb) {
+ size_t tmp;
+
+ errno = 0;
+ tmp = fwrite(ptr, size, nmemb, stream);
+ if (tmp > 0) {
+ nmemb -= tmp;
+ if (nmemb)
+ ptr = (void *) ((char *) ptr + (tmp * size));
+ } else if (errno != EINTR && errno != EAGAIN)
+ return -1;
+ if (errno == EAGAIN) /* Try later, *sigh* */
+ usleep(10000);
+ }
+ return 0;
+}
+
+static inline ssize_t read_all(int fd, char *buf, size_t count)
+{
+ ssize_t ret;
+ ssize_t c = 0;
+ int tries = 0;
+
+ memset(buf, 0, count);
+ while (count > 0) {
+ ret = read(fd, buf, count);
+ if (ret <= 0) {
+ if ((errno == EAGAIN || errno == EINTR || ret == 0) &&
+ (tries++ < 5))
+ continue;
+ return c ? c : -1;
+ }
+ if (ret > 0)
+ tries = 0;
+ count -= ret;
+ buf += ret;
+ c += ret;
+ }
+ return c;
+}
+
+
+#endif /* UTIL_LINUX_ALL_IO_H */