32 lines
706 B
C
Executable file
32 lines
706 B
C
Executable file
/* Reads a 128 kB file onto the stack and "sorts" the bytes in
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it, using quick sort, a multi-pass divide and conquer
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algorithm. The sorted data is written back to the same file
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in-place. */
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#include <debug.h>
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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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#include "tests/vm/qsort.h"
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const char *test_name = "child-qsort";
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int
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main (int argc UNUSED, char *argv[])
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{
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int handle;
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unsigned char buf[128 * 1024];
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size_t size;
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quiet = true;
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CHECK ((handle = open (argv[1])) > 1, "open \"%s\"", argv[1]);
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size = read (handle, buf, sizeof buf);
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qsort_bytes (buf, sizeof buf);
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seek (handle, 0);
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write (handle, buf, size);
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close (handle);
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return 72;
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}
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