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#include "test-tool.h"
#include "git-compat-util.h"
int cmd__genzeros(int argc, const char **argv)
{
/* static, so that it is NUL-initialized */
static const char zeros[256 * 1024];
intmax_t count;
ssize_t n;
if (argc > 2) {
fprintf(stderr, "usage: %s [<count>]\n", argv[0]);
return 1;
}
count = argc > 1 ? strtoimax(argv[1], NULL, 0) : -1;
/* Writing out individual NUL bytes is slow... */
while (count < 0)
if (write(1, zeros, ARRAY_SIZE(zeros)) < 0)
return -1;
while (count > 0) {
n = write(1, zeros, count < ARRAY_SIZE(zeros) ?
count : ARRAY_SIZE(zeros));
if (n < 0)
return -1;
count -= n;
}
return 0;
}
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