diff options
Diffstat (limited to 'www/content/posts/c-func-ext.md')
| -rw-r--r-- | www/content/posts/c-func-ext.md | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/www/content/posts/c-func-ext.md b/www/content/posts/c-func-ext.md new file mode 100644 index 0000000..f5ab8fb --- /dev/null +++ b/www/content/posts/c-func-ext.md @@ -0,0 +1,23 @@ +--- +title: "Libc/POSIX Function \"Extensions\"" +date: 2025-03-04T13:40:33+08:00 +lastmod: 2025-03-04T13:40:33+08:00 +categories: coding +tags: + - c + - posix +--- + +Recently, I've been working on porting libraries to GNU/Hurd. The maintainers of GNU/Hurd +have a strong belief that [`*_MAX` macros on POSIX system interfaces](https://pubs.opengroup.org/onlinepubs/9699919799.2008edition/nframe.html) +are very evil things. This is indeed true as a lot of (old) libraries relying on those macros +to determine the buffer size. In modern programming world, it is definitely a bad +idea to use fixed values for buffer sizes without considering possible overflow, unless +you are certain that size is sufficient. + +When you get rid of some old things, you will always meet compatibility problems. In these +case, old source codes using these macros just do not compile now. So here are some + +<!--more--> + + |