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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-10-07 14:44:17 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-10-07 14:46:40 +0200
commit267d5318e1cbf69a071b5188dda50310af2f2f8b (patch)
tree9b17035763ab4c69458f28fe37258713c45920a5 /lib/tar
parent3a7d758d1d5a9b6499bdc3f75077932ba66f89d7 (diff)
Cleanup: Move padd_file function to libtar
It's only ever used for padding tarballs. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/tar')
-rw-r--r--lib/tar/Makemodule.am2
-rw-r--r--lib/tar/padd_file.c40
-rw-r--r--lib/tar/write_header.c4
3 files changed, 43 insertions, 3 deletions
diff --git a/lib/tar/Makemodule.am b/lib/tar/Makemodule.am
index 42f11ae..129d66f 100644
--- a/lib/tar/Makemodule.am
+++ b/lib/tar/Makemodule.am
@@ -2,7 +2,7 @@ libtar_a_SOURCES = lib/tar/read_header.c lib/tar/write_header.c lib/tar/skip.c
libtar_a_SOURCES += lib/tar/number.c lib/tar/checksum.c lib/tar/cleanup.c
libtar_a_SOURCES += lib/tar/read_sparse_map.c lib/tar/read_sparse_map_old.c
libtar_a_SOURCES += lib/tar/base64.c lib/tar/urldecode.c lib/tar/internal.h
-libtar_a_SOURCES += include/tar.h
+libtar_a_SOURCES += lib/tar/padd_file.c include/tar.h
libtar_a_CFLAGS = $(AM_CFLAGS)
libtar_a_CPPFLAGS = $(AM_CPPFLAGS)
diff --git a/lib/tar/padd_file.c b/lib/tar/padd_file.c
new file mode 100644
index 0000000..471370d
--- /dev/null
+++ b/lib/tar/padd_file.c
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * padd_file.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "config.h"
+#include "tar.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+
+int padd_file(int outfd, sqfs_u64 size)
+{
+ size_t padd_sz = size % TAR_RECORD_SIZE;
+ int status = -1;
+ sqfs_u8 *buffer;
+
+ if (padd_sz == 0)
+ return 0;
+
+ padd_sz = TAR_RECORD_SIZE - padd_sz;
+
+ buffer = calloc(1, padd_sz);
+ if (buffer == NULL)
+ goto fail_errno;
+
+ if (write_data("padding output file to block size",
+ outfd, buffer, padd_sz)) {
+ goto out;
+ }
+
+ status = 0;
+out:
+ free(buffer);
+ return status;
+fail_errno:
+ perror("padding output file to block size");
+ goto out;
+}
diff --git a/lib/tar/write_header.c b/lib/tar/write_header.c
index 4c8caa2..14802c0 100644
--- a/lib/tar/write_header.c
+++ b/lib/tar/write_header.c
@@ -109,7 +109,7 @@ static int write_gnu_header(int fd, const struct stat *orig,
return -1;
}
- return padd_file(fd, payload_len, 512);
+ return padd_file(fd, payload_len);
}
static size_t num_digits(size_t num)
@@ -152,7 +152,7 @@ static int write_schily_xattr(int fd, const struct stat *orig,
dprintf(fd, "%zu %s%s=%s\n", len, prefix, it->key, it->value);
}
- return padd_file(fd, total_size, 512);
+ return padd_file(fd, total_size);
}
int write_tar_header(int fd, const struct stat *sb, const char *name,