Bug 1110 reported that the LOOP_GET_STATUS ioctl apparently returnes non-zero
error messages, contrary to the documentation. Whatever. This patch from zhaoway <zw@debian.org> looks safe enough. -Erik
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@ -1507,7 +1507,7 @@ extern char *find_unused_loop_device(void)
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sprintf(dev, "/dev/loop%d", i);
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if (stat(dev, &statbuf) == 0 && S_ISBLK(statbuf.st_mode)) {
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if ((fd = open(dev, O_RDONLY)) >= 0) {
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if (ioctl(fd, LOOP_GET_STATUS, &loopinfo) == -1) {
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if (ioctl(fd, LOOP_GET_STATUS, &loopinfo) != 0) {
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if (errno == ENXIO) { /* probably free */
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close(fd);
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return strdup(dev);
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