Commit Graph

87 Commits

Author SHA1 Message Date
FRIGN
01de5df8e6 Audit du(1) and refactor recurse()
While auditing du(1) I realized that there's no way the over 100 lines
of procedures in du() would pass the audit.
Instead, I decided to rewrite this section using recurse() from libutil.
However, the issue was that you'd need some kind of payload to count
the number of bytes in the subdirectories and use them in the higher
hierarchies.
The solution is to add a "void *data" data pointer to each recurse-
function-prototype, which we might also be able to use in other
recurse-applications.
recurse() itself had to be augmented with a recurse_samedev-flag, which
basically prevents recurse from leaving the current device.

Now, let's take a closer look at the audit:
1) Removing the now unnecessary util-functions push, pop, xrealpath,
   rename print() to printpath(), localize some global variables.
2) Only pass the block count to nblks instead of the entire stat-
   pointer.
3) Fix estrtonum to use the minimum of LLONG_MAX and SIZE_MAX.
4) Use idiomatic argv+argc-loop
5) Report proper exit-status.
2015-03-11 23:21:52 +01:00
Hiltjo Posthuma
066a0306a1 fork: no need to _exit() on the error case 2015-03-10 20:05:18 +01:00
FRIGN
a8bd21c0ab Use switch with fork()
Allows dropping a local variable if the explicit PID is not needed
and it makes it clearer what happens.
Also, one should always strive for consistency for cases like these.
2015-03-09 15:01:29 +01:00
FRIGN
6f207dac5f Don't return but _exit after failed exec*() and fork()
Quoting POSIX[0]:
"Care should be taken, also, to call _exit() rather than exit() if exec cannot be used, since
exit() flushes and closes standard I/O channels, thereby damaging the parent process' standard
I/O data structures. (Even with fork(), it is wrong to call exit(), since buffered data would
then be flushed twice.)"

[0]: http://pubs.opengroup.org/onlinepubs/009695399/functions/vfork.html
2015-03-09 01:12:59 +01:00
FRIGN
c8f2b068f6 Fix segmentation fault in tar(1) 2015-03-03 11:26:59 +01:00
FRIGN
8dc92fbd6c Refactor enmasse() and recurse() to reflect depth
The HLP-changes to sbase have been a great addition of functionality,
but they kind of "polluted" the enmasse() and recurse() prototypes.
As this will come in handy in the future, knowing at which "depth"
you are inside a recursing function is an important functionality.

Instead of having a special HLP-flag passed to enmasse, each sub-
function needs to provide it on its own and can calculate results
based on the current depth (for instance, 'H' implies 'P' at
depth > 0).
A special case is recurse(), because it actually depends on the
follow-type. A new flag "recurse_follow" brings consistency into
what used to be spread across different naming conventions (fflag,
HLP_flag, ...).

This also fixes numerous bugs with the behaviour of HLP in the
tools using it.
2015-03-02 22:50:38 +01:00
sin
29be7a3f23 tar: Style fix 2015-02-17 09:13:15 +00:00
FRIGN
8e016fad91 Make the tar(1)-header fixed again
This is clearer.
2015-02-16 20:01:33 +01:00
FRIGN
eb17f2cc9c Refactor tar(1) 2015-02-16 19:47:36 +01:00
sin
8f068589fb Fix recurse() prototype and convert char to int flags 2015-02-16 16:23:12 +00:00
Tai Chi Minh Ralph Eastwood
82bc92da51 recurse: add symlink derefencing flags -H and -L 2015-02-16 15:53:55 +00:00
FRIGN
31572c8b0e Clean up #includes 2015-02-14 21:12:23 +01:00
sin
2f6ffc9ec9 No need to specify "rb" and "wb" in fopen, use "r" and "w" 2015-02-01 15:55:30 +00:00
sin
63d7f29bd9 Fix build 2015-01-26 16:14:45 +00:00
sin
2334c04952 tar: Remove support for old syntax (we now require '-' to parse flags) 2015-01-26 16:14:05 +00:00
sin
1412d07b7d tar: No need to use -f for gzip 2015-01-26 16:03:46 +00:00
sin
7fbb858bcd tar: Add support for -z and -j by invoking external programs
Only extraction is supported at the moment.
2015-01-26 15:59:47 +00:00
FRIGN
ec8246bbc6 Un-boolify sbase
It actually makes the binaries smaller, the code easier to read
(gems like "val == true", "val == false" are gone) and actually
predictable in the sense of that we actually know what we're
working with (one bitwise operator was quite adventurous and
should now be fixed).

This is also more consistent with the other suckless projects
around which don't use boolean types.
2014-11-14 10:54:20 +00:00
FRIGN
7d2683ddf2 Sort includes and more cleanup and fixes in util/ 2014-11-14 10:54:10 +00:00
FRIGN
eee98ed3a4 Fix coding style
It was about damn time. Consistency is very important in such a
big codebase.
2014-11-13 18:08:43 +00:00
sin
9750071b97 Fix stupid GCC warning
tar.c:239:9: warning: missing braces around initializer [-Wmissing-braces]

I believe this is an unresolved bug in GCC.
2014-11-03 10:21:05 +00:00
Michael Forney
7ed4866556 tar: Implement -m flag
This changes the default behavior to adjust mtimes to what is present in
the file header.
2014-11-01 22:34:29 +00:00
Michael Forney
e1f87da43e tar: Handle archives with the prefix field
Also, handle names and prefixes that fill the entire field (and have no
NUL byte) by using a precision specifier.
2014-11-01 22:34:19 +00:00
Michael Forney
0e8a8c9426 tar: Support typeflag '\0' when extracting
POSIX recommends that "For backwards-compatibility, a typeflag value of
binary zero ( '\0' ) should be recognized as meaning a regular file when
extracting files from the archive".
2014-11-01 22:34:08 +00:00
Michael Forney
453ce96d44 tar: Don't crash when get{pw,gr}uid fails 2014-11-01 22:33:55 +00:00
sin
0c5b7b9155 Stop using EXIT_{SUCCESS,FAILURE} 2014-10-02 23:46:59 +01:00
Hiltjo Posthuma
953ebf3573 code style
Signed-off-by: Hiltjo Posthuma <hiltjo@codemadness.org>
2014-06-01 18:02:30 +01:00
sin
e37e2782a9 Only use major()/minor() if they are available in tar(1)
Otherwise silently ignore them in the archive case.  This is the
same in principle as what we do in the unarchive case.
2014-01-30 16:17:25 +00:00
sin
0a7791a25c Use recurse() in tar(1) instead of ftw(3) 2014-01-30 14:55:38 +00:00
sin
c83aef2cda Use preprocessor conditionals to check if makedev() is present
makedev() is not portable and is typically implemented as a
macro.  If it exists use it, otherwise silently ignore character
and block devices.
2014-01-28 17:22:48 +00:00
sin
b5a511dacf Exit with EXIT_SUCCESS/EXIT_FAILURE instead of 0 and 1
Fixed for consistency purposes.
2013-10-07 16:44:22 +01:00
David Galos
b5b7db4009 tar: Check inode AND dev before ignoring a file. Thanks, Lars Lindqvist! 2013-07-28 12:12:03 -04:00
Roberto E. Vargas Caballero
f636ac791b Avoid infinite loop in tar
When the tar file is written in one directory archived by tar
the function archive enters in an infinite loop due to de
tar file written. This patch avoid this case checking the
inode of the tar file before of adding it to the archive.
2013-07-20 13:18:39 -04:00
David Galos
9f8deb4b23 Tar compiles on BSD, thanks Roberto E. Vargas Caballero. Also remove tons of trailing whitespace. 2013-07-20 01:27:42 -04:00
sin
43c4213631 Remove trailing whitespace 2013-07-20 00:56:04 -04:00
David Galos
c5f10c4b06 Fixing idiotic mistake in tar 2013-07-18 11:52:01 -04:00
David Galos
2c75eb98d9 Adding tar. 2013-07-18 11:15:35 -04:00