text: /*
   * 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* */
  			xusleep(250000);
  	}
  	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* */
  			xusleep(250000);
  	}
  	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 (ret < 0 && (errno == EAGAIN || errno == EINTR) && (tries++ < 5)) {
  				xusleep(250000);
  				continue;
  			}
  			return c ? c : -1;
  		}
  		if (ret > 0)
  			tries = 0;
  		count -= ret;
  		buf += ret;
  		c += ret;
  	}
  	return c;
  }
  
  #endif /* UTIL_LINUX_ALL_IO_H */
  