brad/backly
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compare: brad:67906a920a8283cb0d6ff835da5cecbfd822587a
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brad:v1.40
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brad:v1.20
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3 changed files with 60 additions and 66 deletions
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4
Makefile
View File

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

35
README.md → README
View File

@ -1,8 +1,5 @@
# backly
A simple directory cloner
## About backly
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
@ -11,25 +8,31 @@ 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
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`.
Installation
============
## How to report bugs?
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'.
Open an issue on the issue tracker.
How to report bugs?
===================
Bugs should be reported to L. Bradley LaBoon <me@bradleylaboon.com>
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).

87
backly.c
View File

@ -37,12 +37,11 @@ void printHelp()
{
printUsage(stdout);
printf("Turn destdir into a clone of srcdir.\n\n");
printf("Options:\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(" --test\tRun in test mode.\n");
printf(" --help\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");
}
@ -54,13 +53,13 @@ void removeMissing(char *src, int srcPrefix, char *dest, int destPrefix, int tes
srcLen++;
while (dest[destLen])
destLen++;
DIR *destDir = opendir(dest);
if (destDir == NULL) {
fprintf(stderr, "Could not open %s: %s\n", dest, strerror(errno));
return;
}
// If the entire directory doesn't exist in src, remove it from dest
DIR *srcDir = opendir(src);
if (srcDir == NULL) {
@ -89,24 +88,24 @@ void removeMissing(char *src, int srcPrefix, char *dest, int destPrefix, int tes
}
}
closedir(srcDir);
// Look at each item in the folder
struct dirent *item;
while ((item = readdir(destDir)) != NULL) {
// Ignore . and .. references
if (strcmp(item->d_name, ".") == 0 || strcmp(item->d_name, "..") == 0)
continue;
int itemLen = 0;
while (item->d_name[itemLen])
itemLen++;
// +2 because a trailing slash might be added
char itemSrc[srcLen + itemLen + 2];
char itemDest[destLen + itemLen + 2];
sprintf(itemSrc, "%s%s", src, item->d_name);
sprintf(itemDest, "%s%s", dest, item->d_name);
// Test if item is a directory
int itemIsDir = 1;
DIR *testDir = opendir(itemDest);
@ -114,7 +113,7 @@ void removeMissing(char *src, int srcPrefix, char *dest, int destPrefix, int tes
itemIsDir = 0;
else if (testDir != NULL)
closedir(testDir);
if (itemIsDir == 1) {
// If it's a directory, append trailing slashes and recurse
itemSrc[srcLen + itemLen] = '/';
@ -151,7 +150,7 @@ void removeMissing(char *src, int srcPrefix, char *dest, int destPrefix, int tes
}
}
}
closedir(destDir);
return;
}
@ -163,13 +162,13 @@ void copyNew(char *src, int srcPrefix, char *dest, int destPrefix, int testMode)
srcLen++;
while(dest[destLen])
destLen++;
DIR *srcDir = opendir(src);
if (srcDir == NULL) {
fprintf(stderr, "Could not open %s: %s\n", src, strerror(errno));
return;
}
// If the dest directory doesn't exist, create it
DIR *destDir = opendir(dest);
if (destDir == NULL) {
@ -196,22 +195,22 @@ void copyNew(char *src, int srcPrefix, char *dest, int destPrefix, int testMode)
}
}
closedir(destDir);
// Look at each item in the folder
struct dirent *item;
while ((item = readdir(srcDir)) != NULL) {
if (strcmp(item->d_name, ".") == 0 || strcmp(item->d_name, "..") == 0)
continue;
int itemLen = 0;
while (item->d_name[itemLen])
itemLen++;
char itemSrc[srcLen + itemLen + 2];
char itemDest[destLen + itemLen + 2];
sprintf(itemSrc, "%s%s", src, item->d_name);
sprintf(itemDest, "%s%s", dest, item->d_name);
// Test if item is a directory
int itemIsDir = 1;
DIR *testDir = opendir(itemSrc);
@ -219,7 +218,7 @@ void copyNew(char *src, int srcPrefix, char *dest, int destPrefix, int testMode)
itemIsDir = 0;
else if (testDir != NULL)
closedir(testDir);
if (itemIsDir == 1) {
// If it's a directory, recurse
itemSrc[srcLen + itemLen] = '/';
@ -240,7 +239,7 @@ void copyNew(char *src, int srcPrefix, char *dest, int destPrefix, int testMode)
}
} else {
fclose(destFile);
// Check if file size or modified time is different
struct stat srcStat, destStat;
if (stat(itemSrc, &srcStat) == -1) {
@ -251,13 +250,13 @@ void copyNew(char *src, int srcPrefix, char *dest, int destPrefix, int testMode)
fprintf(stderr, "Could not stat %s\n", itemDest);
continue;
}
if (srcStat.st_size != destStat.st_size)
needToCopy = 1;
else if (srcStat.st_mtime > destStat.st_mtime)
needToCopy = 1;
}
// Only copy file if it doesn't exist or has changed
if (needToCopy == 1) {
printf("+ %s ", itemSrc + srcPrefix);
@ -268,7 +267,7 @@ 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", "-f", "-P", "--preserve=timestamps,links", itemSrc, itemDest, (char *) NULL);
execlp("cp", "cp", "-fp", itemSrc, itemDest, (char *) NULL);
} else {
struct stat srcStat, destStat;
double pDone = 0;
@ -277,27 +276,22 @@ void copyNew(char *src, int srcPrefix, char *dest, int destPrefix, int testMode)
while (waitpid(pid, NULL, WNOHANG) == 0) {
if (stat(itemDest, &destStat) == -1)
continue;
pDone = (double)destStat.st_size / (double)srcStat.st_size;
for (int i = 0; i < numPrinted; i++)
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");
}
}
}
closedir(srcDir);
return;
}
@ -305,8 +299,8 @@ 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, remove = 1;
int testMode = 0;
// Parse arguments
for (int i = 1; i < argc; i++) {
if (strcmp(argv[i], "--help") == 0) {
@ -315,41 +309,39 @@ 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 {
destArg = i;
}
}
if (srcArg == 0 || destArg == 0) {
printUsage(stderr);
fprintf(stderr, "Run 'backly --help' for more information.\n");
exit(1);
}
// Determine argument lengths
int srcLen = 0, destLen = 0;
while (argv[srcArg][srcLen])
srcLen++;
while (argv[destArg][destLen])
destLen++;
// Add trailing slashes to directory arguments if necessary
char srcDir[srcLen + 2], destDir[destLen + 2];
if (argv[srcArg][srcLen - 1] == '/')
sprintf(srcDir, "%s", argv[srcArg]);
else
sprintf(srcDir, "%s/", argv[srcArg]);
if (argv[destArg][destLen - 1] == '/')
sprintf(destDir, "%s", argv[destArg]);
else
sprintf(destDir, "%s/", argv[destArg]);
// Check if directories exist and can be accessed
DIR *dir = opendir(srcDir);
if (dir == NULL) {
@ -357,20 +349,19 @@ int main(int argc, char **argv)
exit(1);
}
closedir(dir);
dir = opendir(destDir);
if (dir == NULL) {
fprintf(stderr, "Could not open destination: %s\n", strerror(errno));
exit(1);
}
closedir(dir);
// Remove files from the destination that don't exist in the source
if (remove)
removeMissing(srcDir, strlen(srcDir), destDir, strlen(destDir), testMode);
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);
return 0;
}