83 lines
1.5 KiB
C
83 lines
1.5 KiB
C
/*
|
|
* 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 */
|