83 lines
1.5 KiB
C
83 lines
1.5 KiB
C
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/*
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* No copyright is claimed. This code is in the public domain; do with
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* it what you wish.
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*
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* Written by Karel Zak <kzak@redhat.com>
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* Petr Uzel <petr.uzel@suse.cz>
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*/
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#ifndef UTIL_LINUX_ALL_IO_H
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#define UTIL_LINUX_ALL_IO_H
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include "c.h"
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static inline int write_all(int fd, const void *buf, size_t count)
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{
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while (count) {
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ssize_t tmp;
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errno = 0;
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tmp = write(fd, buf, count);
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if (tmp > 0) {
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count -= tmp;
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if (count)
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buf = (void *) ((char *) buf + tmp);
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} else if (errno != EINTR && errno != EAGAIN)
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return -1;
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if (errno == EAGAIN) /* Try later, *sigh* */
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usleep(10000);
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}
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return 0;
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}
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static inline int fwrite_all(const void *ptr, size_t size,
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size_t nmemb, FILE *stream)
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{
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while (nmemb) {
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size_t tmp;
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errno = 0;
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tmp = fwrite(ptr, size, nmemb, stream);
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if (tmp > 0) {
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nmemb -= tmp;
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if (nmemb)
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ptr = (void *) ((char *) ptr + (tmp * size));
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} else if (errno != EINTR && errno != EAGAIN)
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return -1;
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if (errno == EAGAIN) /* Try later, *sigh* */
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usleep(10000);
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}
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return 0;
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}
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static inline ssize_t read_all(int fd, char *buf, size_t count)
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{
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ssize_t ret;
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ssize_t c = 0;
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int tries = 0;
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memset(buf, 0, count);
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while (count > 0) {
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ret = read(fd, buf, count);
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if (ret <= 0) {
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if ((errno == EAGAIN || errno == EINTR || ret == 0) &&
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(tries++ < 5))
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continue;
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return c ? c : -1;
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}
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if (ret > 0)
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tries = 0;
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count -= ret;
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buf += ret;
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c += ret;
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}
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return c;
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}
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#endif /* UTIL_LINUX_ALL_IO_H */
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