clang-format
This commit is contained in:
@@ -35,79 +35,73 @@
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* Usage: cp oldfile newfile
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*/
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/* Copy one file to another. */
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static
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void
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copy(const char *from, const char *to)
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{
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int fromfd;
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int tofd;
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char buf[1024];
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int len, wr, wrtot;
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static void copy(const char *from, const char *to) {
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int fromfd;
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int tofd;
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char buf[1024];
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int len, wr, wrtot;
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/*
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* Open the files, and give up if they won't open
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*/
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fromfd = open(from, O_RDONLY);
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if (fromfd<0) {
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err(1, "%s", from);
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}
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tofd = open(to, O_WRONLY|O_CREAT|O_TRUNC);
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if (tofd<0) {
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err(1, "%s", to);
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}
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/*
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* Open the files, and give up if they won't open
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*/
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fromfd = open(from, O_RDONLY);
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if (fromfd < 0) {
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err(1, "%s", from);
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}
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tofd = open(to, O_WRONLY | O_CREAT | O_TRUNC);
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if (tofd < 0) {
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err(1, "%s", to);
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}
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/*
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* As long as we get more than zero bytes, we haven't hit EOF.
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* Zero means EOF. Less than zero means an error occurred.
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* We may read less than we asked for, though, in various cases
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* for various reasons.
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*/
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while ((len = read(fromfd, buf, sizeof(buf)))>0) {
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/*
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* Likewise, we may actually write less than we attempted
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* to. So loop until we're done.
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*/
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wrtot = 0;
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while (wrtot < len) {
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wr = write(tofd, buf+wrtot, len-wrtot);
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if (wr<0) {
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err(1, "%s", to);
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}
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wrtot += wr;
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}
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}
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/*
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* If we got a read error, print it and exit.
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*/
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if (len<0) {
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err(1, "%s", from);
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}
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/*
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* As long as we get more than zero bytes, we haven't hit EOF.
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* Zero means EOF. Less than zero means an error occurred.
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* We may read less than we asked for, though, in various cases
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* for various reasons.
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*/
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while ((len = read(fromfd, buf, sizeof(buf))) > 0) {
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/*
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* Likewise, we may actually write less than we attempted
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* to. So loop until we're done.
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*/
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wrtot = 0;
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while (wrtot < len) {
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wr = write(tofd, buf + wrtot, len - wrtot);
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if (wr < 0) {
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err(1, "%s", to);
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}
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wrtot += wr;
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}
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}
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/*
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* If we got a read error, print it and exit.
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*/
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if (len < 0) {
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err(1, "%s", from);
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}
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if (close(fromfd) < 0) {
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err(1, "%s: close", from);
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}
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if (close(fromfd) < 0) {
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err(1, "%s: close", from);
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}
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if (close(tofd) < 0) {
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err(1, "%s: close", to);
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}
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if (close(tofd) < 0) {
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err(1, "%s: close", to);
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}
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}
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int
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main(int argc, char *argv[])
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{
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/*
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* Just do it.
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*
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* We don't allow the Unix model where you can do
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* cp file1 file2 file3 destination-directory
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*
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* although this would be pretty easy to add.
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*/
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if (argc!=3) {
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errx(1, "Usage: cp OLDFILE NEWFILE");
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}
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copy(argv[1], argv[2]);
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return 0;
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int main(int argc, char *argv[]) {
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/*
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* Just do it.
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*
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* We don't allow the Unix model where you can do
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* cp file1 file2 file3 destination-directory
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*
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* although this would be pretty easy to add.
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*/
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if (argc != 3) {
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errx(1, "Usage: cp OLDFILE NEWFILE");
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}
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copy(argv[1], argv[2]);
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return 0;
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}
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