63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
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/* Grows two files in parallel and checks that their contents are
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correct. */
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#include <random.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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#define FILE_SIZE 8143
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static char buf_a[FILE_SIZE];
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static char buf_b[FILE_SIZE];
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static void
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write_some_bytes (const char *file_name, int fd, const char *buf, size_t *ofs)
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{
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if (*ofs < FILE_SIZE)
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{
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size_t block_size = random_ulong () % (FILE_SIZE / 8) + 1;
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size_t ret_val;
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if (block_size > FILE_SIZE - *ofs)
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block_size = FILE_SIZE - *ofs;
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ret_val = write (fd, buf + *ofs, block_size);
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if (ret_val != block_size)
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fail ("write %zu bytes at offset %zu in \"%s\" returned %zu",
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block_size, *ofs, file_name, ret_val);
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*ofs += block_size;
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}
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}
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void
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test_main (void)
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{
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int fd_a, fd_b;
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size_t ofs_a = 0, ofs_b = 0;
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random_init (0);
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random_bytes (buf_a, sizeof buf_a);
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random_bytes (buf_b, sizeof buf_b);
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CHECK (create ("a", 0), "create \"a\"");
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CHECK (create ("b", 0), "create \"b\"");
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CHECK ((fd_a = open ("a")) > 1, "open \"a\"");
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CHECK ((fd_b = open ("b")) > 1, "open \"b\"");
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msg ("write \"a\" and \"b\" alternately");
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while (ofs_a < FILE_SIZE || ofs_b < FILE_SIZE)
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{
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write_some_bytes ("a", fd_a, buf_a, &ofs_a);
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write_some_bytes ("b", fd_b, buf_b, &ofs_b);
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}
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msg ("close \"a\"");
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close (fd_a);
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msg ("close \"b\"");
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close (fd_b);
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check_file ("a", buf_a, FILE_SIZE);
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check_file ("b", buf_b, FILE_SIZE);
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}
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