Import sources from 2011-03-30 iso image

1 files changed, 177 insertions, 0 deletions

diff --git a/sys/src/cmd/cp.c b/sys/src/cmd/cp.c
new file mode 100755
index 000000000..1b07e09e2
--- /dev/null
+++ b/sys/src/cmd/cp.c
@@ -0,0 +1,177 @@
+#include <u.h>
+#include <libc.h>
+
+#define	DEFB	(8*1024)
+
+int	failed;
+int	gflag;
+int	uflag;
+int	xflag;
+void	copy(char *from, char *to, int todir);
+int	copy1(int fdf, int fdt, char *from, char *to);
+
+void
+main(int argc, char *argv[])
+{
+	Dir *dirb;
+	int todir, i;
+
+	ARGBEGIN {
+	case 'g':
+		gflag++;
+		break;
+	case 'u':
+		uflag++;
+		gflag++;
+		break;
+	case 'x':
+		xflag++;
+		break;
+	default:
+		goto usage;
+	} ARGEND
+
+	todir=0;
+	if(argc < 2)
+		goto usage;
+	dirb = dirstat(argv[argc-1]);
+	if(dirb!=nil && (dirb->mode&DMDIR))
+		todir=1;
+	if(argc>2 && !todir){
+		fprint(2, "cp: %s not a directory\n", argv[argc-1]);
+		exits("bad usage");
+	}
+	for(i=0; i<argc-1; i++)
+		copy(argv[i], argv[argc-1], todir);
+	if(failed)
+		exits("errors");
+	exits(0);
+
+usage:
+	fprint(2, "usage:\tcp [-gux] fromfile tofile\n");
+	fprint(2, "\tcp [-x] fromfile ... todir\n");
+	exits("usage");
+}
+
+int
+samefile(Dir *a, char *an, char *bn)
+{
+	Dir *b;
+	int ret;
+
+	ret = 0;
+	b=dirstat(bn);
+	if(b != nil)
+	if(b->qid.type==a->qid.type)
+	if(b->qid.path==a->qid.path)
+	if(b->qid.vers==a->qid.vers)
+	if(b->dev==a->dev)
+	if(b->type==a->type){
+		fprint(2, "cp: %s and %s are the same file\n", an, bn);
+		ret = 1;
+	}
+	free(b);
+	return ret;
+}
+
+void
+copy(char *from, char *to, int todir)
+{
+	Dir *dirb, dirt;
+	char name[256];
+	int fdf, fdt, mode;
+
+	if(todir){
+		char *s, *elem;
+		elem=s=from;
+		while(*s++)
+			if(s[-1]=='/')
+				elem=s;
+		sprint(name, "%s/%s", to, elem);
+		to=name;
+	}
+
+	if((dirb=dirstat(from))==nil){
+		fprint(2,"cp: can't stat %s: %r\n", from);
+		failed = 1;
+		return;
+	}
+	mode = dirb->mode;
+	if(mode&DMDIR){
+		fprint(2, "cp: %s is a directory\n", from);
+		free(dirb);
+		failed = 1;
+		return;
+	}
+	if(samefile(dirb, from, to)){
+		free(dirb);
+		failed = 1;
+		return;
+	}
+	mode &= 0777;
+	fdf=open(from, OREAD);
+	if(fdf<0){
+		fprint(2, "cp: can't open %s: %r\n", from);
+		free(dirb);
+		failed = 1;
+		return;
+	}
+	fdt=create(to, OWRITE, mode);
+	if(fdt<0){
+		fprint(2, "cp: can't create %s: %r\n", to);
+		close(fdf);
+		free(dirb);
+		failed = 1;
+		return;
+	}
+	if(copy1(fdf, fdt, from, to)==0 && (xflag || gflag || uflag)){
+		nulldir(&dirt);
+		if(xflag){
+			dirt.mtime = dirb->mtime;
+			dirt.mode = dirb->mode;
+		}
+		if(uflag)
+			dirt.uid = dirb->uid;
+		if(gflag)
+			dirt.gid = dirb->gid;
+		if(dirfwstat(fdt, &dirt) < 0)
+			fprint(2, "cp: warning: can't wstat %s: %r\n", to);
+	}			
+	free(dirb);
+	close(fdf);
+	close(fdt);
+}
+
+int
+copy1(int fdf, int fdt, char *from, char *to)
+{
+	char *buf;
+	long n, n1, rcount;
+	int rv;
+	char err[ERRMAX];
+
+	buf = malloc(DEFB);
+	/* clear any residual error */
+	err[0] = '\0';
+	errstr(err, ERRMAX);
+	rv = 0;
+	for(rcount=0;; rcount++) {
+		n = read(fdf, buf, DEFB);
+		if(n <= 0)
+			break;
+		n1 = write(fdt, buf, n);
+		if(n1 != n) {
+			fprint(2, "cp: error writing %s: %r\n", to);
+			failed = 1;
+			rv = -1;
+			break;
+		}
+	}
+	if(n < 0) {
+		fprint(2, "cp: error reading %s: %r\n", from);
+		failed = 1;
+		rv = -1;
+	}
+	free(buf);
+	return rv;
+}