We can't rely on sizeof(struct zip_*) returning the sum of
all struct members. At least on ARM padding is added at the
end, as Gerrit Pape reported. This fixes the problem but
still lets the compiler do the summing by introducing
explicit padding at the end of the structs and then taking
its offset as the combined size of the preceding members.
As Junio correctly notes, the _end[] marker array's size
must be greater than zero for compatibility with compilers
other than gcc. The space wasted by the markers can safely
be neglected because we only have one instance of each
struct, i.e. in sum 3 wasted bytes on i386, and 0 on ARM. :)
We still rely on the compiler to not add padding between the
struct members, but that's reasonable given that all of them
are unsigned char arrays.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Z_NULL is defined as 0, use a proper NULL pointer in its stead.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Add symlink support to ZIP file creation, and a few tests.
This implementation sets the "version made by" field
(creator_version) to Unix for symlinks, only; regular files and
directories are still marked as originating from FAT/VFAT/NTFS.
Also set "external file attributes" (attr2) to 0 for regular
files and 16 for directories (FAT attribute), and to the file
mode for symlinks.
We could always set the creator_version to Unix and include the
mode, but then Info-ZIP unzip would set the mode of the extracted
files to *exactly* the value stored in attr2. The FAT trick
makes it apply the umask instead. Note: FAT has no executable
bit, so this information is not stored in the ZIP file.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Use 10 for the "version needed to extract" field. This is the
default value, and we want to use it because we don't do anything
special. Info-ZIP's zip uses it, too.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <junkio@cox.net>
