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39 lines
1.1 KiB
C
39 lines
1.1 KiB
C
/* Verify that toku_os_pwrite does the right thing when writing beyond 4GB. */
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#include <fcntl.h>
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#include <test.h>
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#include <assert.h>
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#include <string.h>
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static int iszero(char *cp, size_t n) {
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size_t i;
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for (i=0; i<n; i++)
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if (cp[i] != 0)
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return 0;
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return 1;
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}
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int test_main(int argc, char *argv[]) {
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char fname[] = "pwrite4g.data";
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int r;
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unlink(fname);
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int fd = open(fname, O_RDWR | O_CREAT | O_BINARY, S_IRWXU|S_IRWXG|S_IRWXO);
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assert(fd>=0);
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char buf[] = "hello";
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int64_t offset = (1LL<<32) + 100;
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r = toku_os_pwrite(fd, buf, sizeof buf, offset);
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assert(r==sizeof buf);
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char newbuf[sizeof buf];
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r = pread(fd, newbuf, sizeof newbuf, 100);
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assert(r==sizeof newbuf);
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assert(iszero(newbuf, sizeof newbuf));
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r = pread(fd, newbuf, sizeof newbuf, offset);
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assert(r==sizeof newbuf);
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assert(memcmp(newbuf, buf, sizeof newbuf) == 0);
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int64_t fsize;
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r = toku_os_get_file_size(fd, &fsize);
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assert(r == 0);
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assert(fsize > 100 + (signed)sizeof(buf));
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r = close(fd);
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assert(r==0);
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return 0;
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}
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