#include <unistd.h>
#include <fcntl.h>
#include <inttypes.h>
+#include <errno.h>
#include "fish.h"
return -1;
}
- if (posix_fallocate (fd, 0, size) == -1) {
+#ifdef HAVE_POSIX_FALLOCATE
+ int err = posix_fallocate (fd, 0, size);
+ if (err != 0) {
+ errno = err;
perror ("fallocate");
close (fd);
unlink (argv[0]);
return -1;
}
+#else
+ /* Slow emulation of posix_fallocate on platforms which don't have it. */
+ char buffer[BUFSIZ];
+ memset (buffer, 0, sizeof buffer);
+
+ size_t remaining = size;
+ while (remaining > 0) {
+ size_t n = remaining > sizeof buffer ? sizeof buffer : remaining;
+ ssize_t r = write (fd, buffer, n);
+ if (r == -1) {
+ perror ("write");
+ close (fd);
+ unlink (argv[0]);
+ return -1;
+ }
+ remaining -= r;
+ }
+#endif
if (close (fd) == -1) {
perror (argv[0]);