dedup

deduplicating backup program
git clone git://git.2f30.org/dedup.git
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dup-keygen.c (918B)


      1 #include <sys/types.h>
      2 #include <sys/stat.h>
      3 
      4 #include <err.h>
      5 #include <fcntl.h>
      6 #include <stdint.h>
      7 #include <stdio.h>
      8 #include <stdlib.h>
      9 #include <unistd.h>
     10 
     11 #include "arg.h"
     12 #include "config.h"
     13 #include "key.h"
     14 #include "misc.h"
     15 #include "state.h"
     16 
     17 struct param param;	/* unused but needed for linking */
     18 int verbose;
     19 char *argv0;
     20 
     21 static void
     22 usage(void)
     23 {
     24 	fprintf(stderr, "usage: %s [-v] keyfile\n", argv0);
     25 	exit(1);
     26 }
     27 
     28 int
     29 main(int argc, char *argv[])
     30 {
     31 	unsigned char key[KEYSIZE];
     32 	int fd;
     33 
     34 	ARGBEGIN {
     35 	case 'v':
     36 		verbose++;
     37 		break;
     38 	default:
     39 		usage();
     40 	} ARGEND
     41 
     42 	if (argc != 1)
     43 		usage();
     44 
     45 	fd = open(argv[0], O_RDWR | O_CREAT | O_EXCL, 0600);
     46 	if (fd < 0)
     47 		err(1, "open: %s", argv[0]);
     48 	if (keygen(key, sizeof(key)) < 0)
     49 		printerr("keygen");
     50 	if (writekey(fd, key, sizeof(key)) < 0)
     51 		printerr("writekey: %s", argv[0]);
     52 	fsync(fd);
     53 	if (close(fd) < 0)
     54 		err(1, "close: %s", argv[0]);
     55 	return 0;
     56 }