936615752a
Copy all the misc/cgo files from the gc toolchain into libgo/misc.
These will be used for testing purposes by later changes to the
gotools directory.
Reviewed-on: https://go-review.googlesource.com/46721
From-SVN: r249674
57 lines
1.2 KiB
C
57 lines
1.2 KiB
C
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#define fd (100)
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// Tests libgo2.so, which does not export any functions.
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// Read a string from the file descriptor and print it.
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int main(void) {
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int i;
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ssize_t n;
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char buf[20];
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struct timespec ts;
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// The descriptor will be initialized in a thread, so we have to
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// give a chance to get opened.
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for (i = 0; i < 1000; i++) {
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n = read(fd, buf, sizeof buf);
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if (n >= 0)
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break;
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if (errno != EBADF && errno != EINVAL) {
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fprintf(stderr, "BUG: read: %s\n", strerror(errno));
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return 2;
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}
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// An EBADF error means that the shared library has not opened the
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// descriptor yet.
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ts.tv_sec = 0;
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ts.tv_nsec = 1000000;
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nanosleep(&ts, NULL);
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}
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if (n < 0) {
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fprintf(stderr, "BUG: failed to read any data from pipe\n");
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return 2;
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}
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if (n == 0) {
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fprintf(stderr, "BUG: unexpected EOF\n");
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return 2;
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}
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if (n == sizeof buf) {
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n--;
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}
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buf[n] = '\0';
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printf("%s\n", buf);
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return 0;
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}
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