1 files changed, 118 insertions, 0 deletions
diff --git a/utils/cp/cp.c b/utils/cp/cp.c
new file mode 100644
index 00000000..7395e16c
--- /dev/null
+++ b/utils/cp/cp.c
@@ -0,0 +1,118 @@
+#include <lib9.h>
+
+#define	DEFB	(8*1024)
+
+void	copy(char *from, char *to, int todir);
+void	copy1(int fdf, int fdt, char *from, char *to);
+void	fixbackslash(char *file);
+
+void
+main(int argc, char *argv[])
+{
+	Dir *dirb;
+	int todir, i;
+
+	if(argc<3){
+		fprint(2, "usage:\tcp fromfile tofile\n");
+		fprint(2, "\tcp fromfile ... todir\n");
+		exits("usage");
+	}
+
+	for(i=0; i<argc; i++)
+		fixbackslash(argv[i]);
+
+
+	todir=0;
+	if((dirb = dirstat(argv[argc-1]))!=nil && (dirb->mode&DMDIR))
+		todir=1;
+	if(argc>3 && !todir){
+		fprint(2, "cp: %s not a directory\n", argv[argc-1]);
+		exits("bad usage");
+	}
+	for(i=1; i<argc-1; i++)
+		copy(argv[i], argv[argc-1], todir);
+	exits(0);
+}
+
+void
+copy(char *from, char *to, int todir)
+{
+	Dir *dirb, *dirt;
+	char name[256];
+	int fdf, fdt;
+
+	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);
+		return;
+	}
+	if(dirb->mode&DMDIR){
+		fprint(2, "cp: %s is a directory\n", from);
+		return;
+	}
+	dirb->mode &= 0777;
+	if((dirt = dirstat(to))!=nil)
+	if(dirb->qid.path==dirt->qid.path && dirb->qid.vers==dirt->qid.vers)
+	if(dirb->dev==dirt->dev && dirb->type==dirt->type){
+		fprint(2, "cp: %s and %s are the same file\n", from, to);
+		return;
+	}
+	fdf=open(from, OREAD);
+	if(fdf<0){
+		fprint(2, "cp: can't open %s: %r\n", from);
+		return;
+	}
+	fdt=create(to, OWRITE, dirb->mode);
+	if(fdt<0){
+		fprint(2, "cp: can't create %s: %r\n", to);
+		close(fdf);
+		return;
+	}
+	copy1(fdf, fdt, from, to);
+	close(fdf);
+	close(fdt);
+}
+
+void
+copy1(int fdf, int fdt, char *from, char *to)
+{
+	char *buf;
+	long n, n1, rcount;
+	char err[ERRMAX];
+
+	buf = malloc(DEFB);
+	/* clear any residual error */
+	err[0] = '\0';
+	errstr(err, ERRMAX);
+	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);
+			break;
+		}
+	}
+	if(n < 0) 
+		fprint(2, "cp: error reading %s: %r\n", from);
+	free(buf);
+}
+
+void
+fixbackslash(char *file)
+{
+	char *p;
+	
+	for(p=file; *p; p++)
+		if(*p == '\\')
+			*p = '/';
+}