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/*
* $Id$
*
* 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;
}
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