30 lines
554 B
C
30 lines
554 B
C
#include "test-tool.h"
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#include "git-compat-util.h"
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int cmd__csprng(int argc, const char **argv)
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{
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unsigned long count;
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unsigned char buf[1024];
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if (argc > 2) {
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fprintf(stderr, "usage: %s [<size>]\n", argv[0]);
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return 2;
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}
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count = (argc == 2) ? strtoul(argv[1], NULL, 0) : -1L;
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while (count) {
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unsigned long chunk = count < sizeof(buf) ? count : sizeof(buf);
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if (csprng_bytes(buf, chunk) < 0) {
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perror("failed to read");
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return 5;
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}
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if (fwrite(buf, chunk, 1, stdout) != chunk)
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return 1;
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count -= chunk;
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}
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return 0;
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}
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