Width given in format string is larger than the destination buffer.
Type mismatch between scanf format specifier (unsigned long long) and the variable type (long long).
str*cpy / strlen performance fix.

Calculating length of a string two times is unnecessary, and using strncpy width known string length can be replaced with memcpy.
Variable type fix for fgetc.

Reading a single character is fine with fgetc. But if you want to check for EOF, then you have to use 'int' as type,
and if the return value is not EOF, then it can be cast to 'char'.

Example for fail scenario before the fix: if the file contains 0xff character, then the code will interpret it as EOF.
0xff can be banned, but this should be checked in a proper way and not in the reading code.
Preventing use-after-freed possibility.

Probably the original intention was to prevent the possibility of a use-after-freed bug.
But the last strs = NULL statement has no effect, because it's just a local copy.
However, it makes sense to put a similar solution inside the loop right after the memory release.
This way if some codes try to use a previously freed array, then the array will seem to be empty.
String lib performance fix: using memcpy when the length is known.

Using strncpy(target, string, strlen(string)) equals with memcpy(target, string, strlen(string).
Both of them remove the \0 from the end. But for longer string memcpy is definitely more efficient,
because it does not have to search for string termination.

Usually the performance difference is small, and this kind of code rarely used elsewhere,
but a string handling lib should be efficient.
Type fix: 'char*' should be used for string storing instead of 'char'.
Fix for an unlikely memory leak in a unit test.

1 or 2 hosts work fine, otherwise the reserved memory should be released.
(However, using not 1 or 2 is quite hypothetical.)
strncpy fixes: wrong buffer size, lack of termination and similar errors are fixed.

There are lot of fixes here, but they are in a few main category:
1, strncpy(target, source, TARGETSIZE-1)  -> strlcpy(target, source, TARGETSIZE)
   If the target's last byte is not \0, then the string will not be terminated.
2, strncpy(target, source, TARGETSIZE) -> strlcpy(target, source, TARGETSIZE)
   If the source is longer than the target, then the string will not get NUL termination
3, combination of memset + strncpy or strncpy + buffer[last_byte]=0 -> strlcpy
   It's ugly and inefficient but at least gives correct result.

Remark: the usual string length (e.g. variable name, path) is much shorter than the buffer size (1k or 4k)
Using strncpy is quite inefficient because it always fills the rest of the array with 0s.
If you definitely need this feature, then rather use a memset + strlcpy + comment.
(E.g. // I want to fill this whole buffer with 0s, because it contained a private key previously.)
strncpy / strncat inefficiencies.

strncpy with known length can be replace with memcpy.
manual \0 + strncat is ugly, and strlcpy just does the job well.
strncpy + manual termination -> strlcpy
A few more strncpy fixes: buffer size limit, termination, etc.
Memory leak fix in 'ConfigurationDestroy'.
Redmine#4913: file_hash function
pass the exact lenght of release_id in to xstrndup to avoid memory corruption on aix
Merge pull request #1724 from McAtte/loading-aix-xstrndup

pass the exact length of release_id to xstrndup
Merge pull request #1725 from kacfengine/suse_group_setting_bug

Redmine #5864: Users promises: Work around group setting bug on SUSE.
Make help string for --show-vars accurate.

The output includes variables discovered by the agent, and those
defined in policy that do not have a dependency to user-defined
classes (as those are evaluated after variables).
Remove redundant test. It is 100% identical to 101.cf.
Add: Example for users promise type, used in docs
Merge pull request #1726 from nickanderson/redmine/5872

Add: Example for users promise type, used in docs