dedup

commit 9ff8b1f2c9ac45e6b1f3184278a1faa1c0362e9f
parent bf294b1ffe58f2412d592f2e099b73ce0c7daa83
Author: sin <sin@2f30.org>
Date:   Wed, 21 Mar 2018 14:04:43 +0000

Parse input/output file from command line as well

Diffstat:
M
dedup.c
 | 
19
++++++++++++++-----

1 file changed, 14 insertions(+), 5 deletions(-)
diff --git a/dedup.c b/dedup.c
@@ -343,7 +343,7 @@ extract(char *id, int fd)
 				if (ent->blks[j] > nblks)
 					errx(1, "index is corrupted");
 				read_blk(&blk, ent->blks[j]);
-				xwrite(1, blk.data, blk.sz);
+				xwrite(fd, blk.data, blk.sz);
 			}
 			break;
 		}
@@ -494,7 +494,7 @@ list(void)
 void
 usage(void)
 {
-	fprintf(stderr, "usage: %s [-clv] [-e id]\n", argv0);
+	fprintf(stderr, "usage: %s [-clv] [-e id] [file]\n", argv0);
 	exit(1);
 }
 
@@ -502,7 +502,7 @@ int
 main(int argc, char *argv[])
 {
 	char *id = NULL;
-	int lflag = 0, cflag = 0;
+	int fd = -1, lflag = 0, cflag = 0;
 
 	ARGBEGIN {
 	case 'c':
@@ -521,6 +521,9 @@ main(int argc, char *argv[])
 		usage();
 	} ARGEND
 
+	if (argc > 1)
+		usage();
+
 	init();
 
 	if (cflag) {
@@ -533,10 +536,16 @@ main(int argc, char *argv[])
 		return 0;
 	}
 
+	if (argc == 1) {
+		fd = open(argv[0], O_RDWR | O_CREAT, 0600);
+		if (fd == -1)
+			err(1, "open %s", argv[0]);
+	}
+
 	if (id)
-		extract(id, 0);
+		extract(id, fd == -1 ? 0 : fd);
 	else
-		dedup(0);
+		dedup(fd == -1 ? 0 : fd);
 
 	term();
 }