23 lines
474 B
C
23 lines
474 B
C
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/* Try a 0-byte read, which should return 0 without reading
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anything. */
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#include <syscall.h>
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#include "tests/lib.h"
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#include "tests/main.h"
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void
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test_main (void)
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{
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int handle, byte_cnt;
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char buf;
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CHECK ((handle = open ("sample.txt")) > 1, "open \"sample.txt\"");
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buf = 123;
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byte_cnt = read (handle, &buf, 0);
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if (byte_cnt != 0)
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fail ("read() returned %d instead of 0", byte_cnt);
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else if (buf != 123)
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fail ("0-byte read() modified buffer");
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}
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