add open_read_close() and similar stuff

archival/libunarchive/get_header_ar.c

@@ -79,7 +79,7 @@ char get_header_ar(archive_handle_t *archive_handle)
 			(saved in variable long_name) that conatains the real filename */
 			const unsigned int long_offset = atoi(&ar.formatted.name[1]);
 			if (long_offset >= ar_long_name_size) {
-				bb_error_msg_and_die("Cant resolve long filename");
+				bb_error_msg_and_die("can't resolve long filename");
 			}
 			typed->name = xstrdup(ar_long_names + long_offset);
 		}

archival/libunarchive/open_transformer.c

@@ -18,23 +18,23 @@ int open_transformer(int src_fd,
 	int pid;
 
 	if (pipe(fd_pipe) != 0) {
-		bb_perror_msg_and_die("Can't create pipe");
+		bb_perror_msg_and_die("can't create pipe");
 	}
 
 	pid = fork();
 	if (pid == -1) {
-		bb_perror_msg_and_die("Fork failed");
+		bb_perror_msg_and_die("fork failed");
 	}
 
 	if (pid == 0) {
 		/* child process */
-	    close(fd_pipe[0]); /* We don't wan't to read from the parent */
-	    // FIXME: error check?
-	    transformer(src_fd, fd_pipe[1]);
-	    close(fd_pipe[1]); /* Send EOF */
+		close(fd_pipe[0]); /* We don't wan't to read from the parent */
+		// FIXME: error check?
+		transformer(src_fd, fd_pipe[1]);
+		close(fd_pipe[1]); /* Send EOF */
 		close(src_fd);
-	    exit(0);
-	    /* notreached */
+		exit(0);
+		/* notreached */
 	}
 
 	/* parent process */

archival/tar.c

@@ -457,7 +457,7 @@ static int writeTarFile(const int tar_fd, const int verboseFlag,
 
 				if (n == 0 && vfork_exec_errno != 0) {
 					errno = vfork_exec_errno;
-					bb_perror_msg_and_die("Could not exec %s", zip_exec);
+					bb_perror_msg_and_die("cannot exec %s", zip_exec);
 				} else if ((n < 0) && (errno == EAGAIN || errno == EINTR))
 					continue;	/* try it again */
 				break;