diff options
| author | Ian Darwin <ian@darwinsys.com> | 1987-09-16 10:07:36 +0000 |
|---|---|---|
| committer | Ian Darwin <ian@darwinsys.com> | 1987-09-16 10:07:36 +0000 |
| commit | b874ac974476e125e8001255d295b21ca7b327b7 (patch) | |
| tree | e008cb25e9dd3f7632915e004955b9b3f1907ed2 /src/is_tar.c | |
| parent | 171fcd62b2fed7a748f1d4066e350fbec65f375f (diff) | |
| download | file-git-b874ac974476e125e8001255d295b21ca7b327b7.tar.gz | |
Minor reformatting and commentary changes.
Diffstat (limited to 'src/is_tar.c')
| -rw-r--r-- | src/is_tar.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/src/is_tar.c b/src/is_tar.c index 31b94999..e0c32d7f 100644 --- a/src/is_tar.c +++ b/src/is_tar.c @@ -2,10 +2,14 @@ * is_tar() -- figure out whether file is a tar archive. * * Stolen (by the author!) from the public domain tar program: - * Pubic Domain version written 26 Aug 1985 by John Gilmore (ihnp4!hoptoad!gnu). + * Pubic Domain version written 26 Aug 1985 John Gilmore (ihnp4!hoptoad!gnu). * * @(#)list.c 1.18 9/23/86 Public Domain - gnu + * + * Comments changed and some code/comments reformatted + * for file command by Ian Darwin. */ + #include <ctype.h> #include <sys/types.h> #include "tar.h" @@ -15,7 +19,10 @@ long from_oct(); /* Decode octal number */ /* - * Return 1 for old tar file, 0 if the checksum is bad, 2 for Unix Std tar file. + * Return + * 0 if the checksum is bad (i.e., probably not a tar archive), + * 1 for old UNIX tar file, + * 2 for Unix Std (POSIX) tar file. */ int is_tar(header) @@ -42,7 +49,8 @@ is_tar(header) sum -= 0xFF & header->header.chksum[i]; sum += ' '* sizeof header->header.chksum; - if (sum != recsum) return 0; /* Not a tar archive */ + if (sum != recsum) + return 0; /* Not a tar archive */ if (0==strcmp(header->header.magic, TMAGIC)) return 2; /* Unix Standard tar archive */ |