[GitHub] [celix] PengZheng opened a new issue, #491: Check return value of `vasprintf` and `asprintf`

["PengZheng (via GitHub)" <gi...@apache.org>]

PengZheng opened a new issue, #491:
URL: https://github.com/apache/celix/issues/491

   According to `man asprintf`, leaving these return value unchecked is various dangerous: 
   
   > If memory allocation wasn't possible, or some other error occurs, these functions will return -1, and the contents of strp are undefined.
   
   ```C
   #define _GNU_SOURCE         /* See feature_test_macros(7)*/
   #include <stdio.h>
   
   int asprintf(char **strp, const char *fmt, ...);
   int vasprintf(char **strp, const char *fmt, va_list ap);
   
   ```
   It does fail for various reasons, e.g. EILSEQ ( A wide-character code that does not correspond to a valid character has been detected.)
   https://pubs.opengroup.org/onlinepubs/9699919799/functions/fprintf.html
   
   `asprintf` is used extensively in various modules, we need to check its usage carefully.


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