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authorTomas Mraz <tm@t8m.info>2005-09-21 10:00:58 +0000
committerTomas Mraz <tm@t8m.info>2005-09-21 10:00:58 +0000
commitbe09d6354efcb2571731bdffc47da86f22621ac8 (patch)
tree82117bfbaadb46495a545ba4f567dc9bddd97c33 /libpam/pam_modutil_ioloop.c
parent627a0401899af257f0fb711ad54194e14a75c530 (diff)
Relevant BUGIDs:
Purpose of commit: new feature Commit summary: --------------- Moved functions from pammodutil to libpam.
Diffstat (limited to 'libpam/pam_modutil_ioloop.c')
-rw-r--r--libpam/pam_modutil_ioloop.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/libpam/pam_modutil_ioloop.c b/libpam/pam_modutil_ioloop.c
new file mode 100644
index 00000000..54ab0e55
--- /dev/null
+++ b/libpam/pam_modutil_ioloop.c
@@ -0,0 +1,53 @@
+/*
+ * $Id$
+ *
+ * These functions provides common methods for ensure a complete read or
+ * write occurs. It handles EINTR and partial read/write returns.
+ */
+
+#include "pam_modutil_private.h"
+
+#include <unistd.h>
+#include <errno.h>
+
+int
+pam_modutil_read(int fd, char *buffer, int count)
+{
+ int block, offset = 0;
+
+ while (count > 0) {
+ block = read(fd, &buffer[offset], count);
+
+ if (block < 0) {
+ if (errno == EINTR) continue;
+ return block;
+ }
+ if (block == 0) return offset;
+
+ offset += block;
+ count -= block;
+ }
+
+ return offset;
+}
+
+int
+pam_modutil_write(int fd, const char *buffer, int count)
+{
+ int block, offset = 0;
+
+ while (count > 0) {
+ block = write(fd, &buffer[offset], count);
+
+ if (block < 0) {
+ if (errno == EINTR) continue;
+ return block;
+ }
+ if (block == 0) return offset;
+
+ offset += block;
+ count -= block;
+ }
+
+ return offset;
+}