Sleep for a bit after printing file progress to reduce CPU usage

Makefile

@@ -3,14 +3,14 @@ DESTDIR ?=
 PREFIX ?= /usr/local
 
 # Build flags
-FLAGS = -std=gnu99
+OPTS = -std=gnu99
 
 # Build rules
 all: backly
 .PHONY: all install clean
 
 backly: backly.c Makefile
-	gcc $(FLAGS) -o backly backly.c
+	gcc $(OPTS) $(CFLAGS) -o backly backly.c
 
 install: backly
 	install -Dm 0755 backly $(DESTDIR)/$(PREFIX)/bin/backly

README.md

@@ -1,5 +1,8 @@
-About backly
-============
+# backly
+
+A simple directory cloner
+
+## About backly
 
 backly is a simple rsync-like tool for recursively copying entire directories.
 The intended use case is for making verionless incremental backups; however, it
@@ -8,31 +11,25 @@ provided you have read access to the source and write access to the
 destination. Like rsync, backly uses a combination of file size and
 modification date to determine if it needs to be copied over.
 
-This program will not work properly if source is a subdirectory
+This program will **not** work properly if source is a subdirectory
 or destination or vice-versa.
 
-
-Required packages
-=================
+## Required packages
 
 backly does not depend on any packages other than what typically ships with any
 Linux distribution.
 
+## Installation
 
-Installation
-============
+The usual `make` and `make install` is sufficient for compiling and installing
+backly. The default prefix is `/usr/local`, which means the binary will be
+installed to `/usr/local/bin`. The prefix can be changed by setting it in the
+install command; for example, by running `make PREFIX=/usr install`.
 
-The usual 'make' and 'make install' is sufficient for compiling and installing
-backly. The default prefix /usr/local, which means the binary will be installed
-to /usr/local/bin. The prefix can be changed by setting it in the install
-command; for example, by running 'make PREFIX=/usr install'.
+## How to report bugs?
 
-
-How to report bugs?
-===================
-
-Bugs should be reported to L. Bradley LaBoon <me@bradleylaboon.com>
+Open an issue on the issue tracker.
 
 Please indicate what OS and architecture you are using, as well as output from
-the program showing the bug, if possible (hint: run backly with --test to avoid
-destroying any files that you care about).
+the program showing the bug, if possible (hint: run backly with `--test` to
+avoid destroying any files that you care about).

backly.c

@@ -39,8 +39,9 @@ void printHelp()
 	printf("Turn destdir into a clone of srcdir.\n\n");
 
 	printf("Options:\n");
-	printf(" --test\tRun in test mode.\n");
-	printf(" --help\tPrint this help and quit.\n\n");
+	printf(" --test\t\tRun in test mode\n");
+	printf(" --noremove\tDon't remove any files in destdir\n");
+	printf(" --help\t\tPrint this help and quit\n\n");
 
 	printf("Report bugs to L. Bradley LaBoon <me@bradleylaboon.com>\n");
 	printf("backly home page: <http://git.bradleylaboon.com/backly.git>\n");
@@ -267,7 +268,7 @@ void copyNew(char *src, int srcPrefix, char *dest, int destPrefix, int testMode)
 						fprintf(stderr, "Could not fork: %s\n", strerror(errno));
 						continue;
 					} else if (pid == 0) {
-						execlp("cp", "cp", "-fp", itemSrc, itemDest, (char *) NULL);
+						execlp("cp", "cp", "-f", "-P", "--preserve=timestamps,links", itemSrc, itemDest, (char *) NULL);
 					} else {
 						struct stat srcStat, destStat;
 						double pDone = 0;
@@ -283,8 +284,13 @@ void copyNew(char *src, int srcPrefix, char *dest, int destPrefix, int testMode)
 									printf("\b \b");
 								numPrinted = printf("%.2lf%%", pDone * 100);
 								fflush(stdout);
+								usleep(50000);
 							}
 						}
+						for (int i = 0; i < numPrinted; i++)
+							printf("\b \b");
+						printf("100.00%%");
+						fflush(stdout);
 					}
 				}
 				printf("\n");
@@ -299,7 +305,7 @@ void copyNew(char *src, int srcPrefix, char *dest, int destPrefix, int testMode)
 int main(int argc, char **argv)
 {
 	int srcArg = 0, destArg = 0;
-	int testMode = 0;
+	int testMode = 0, remove = 1;
 
 	// Parse arguments
 	for (int i = 1; i < argc; i++) {
@@ -309,6 +315,8 @@ int main(int argc, char **argv)
 		} else if (strcmp(argv[i], "--test") == 0) {
 			testMode = 1;
 			printf("***Operating in test mode.***\n");
+		} else if (strcmp(argv[i], "--noremove") == 0) {
+			remove = 0;
 		} else if (srcArg == 0) {
 			srcArg = i;
 		} else {
@@ -358,7 +366,8 @@ int main(int argc, char **argv)
 	closedir(dir);
 
 	// Remove files from the destination that don't exist in the source
-	removeMissing(srcDir, strlen(srcDir), destDir, strlen(destDir), testMode);
+	if (remove)
+		removeMissing(srcDir, strlen(srcDir), destDir, strlen(destDir), testMode);
 
 	// Copy new files and overwrite existing files if different
 	copyNew(srcDir, strlen(srcDir), destDir, strlen(destDir), testMode);