diff options
| author | Ken Brown <kbrown@cornell.edu> | 2018-06-06 18:45:54 +0300 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2018-06-07 10:42:36 +0300 |
| commit | 1ecbb8d7b796b980db120d81f625d206c6a728da (patch) | |
| tree | 005d4df7abd1093a81615a6431cf8b931222a064 /winsup/cygwin/environ.cc | |
| parent | a7c23d109f2e7d7fed5e1453b47ad6b384a726aa (diff) | |
Cygwin: Clarify some code in environ.cc
Diffstat (limited to 'winsup/cygwin/environ.cc')
| -rw-r--r-- | winsup/cygwin/environ.cc | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/winsup/cygwin/environ.cc b/winsup/cygwin/environ.cc index 43225341c..b452d21a5 100644 --- a/winsup/cygwin/environ.cc +++ b/winsup/cygwin/environ.cc @@ -545,6 +545,7 @@ _getenv_r (struct _reent *, const char *name) return findenv_func (name, &offset); } +/* Return size of environment block, including terminating NULL. */ static int __stdcall envsize (const char * const *in_envp) { @@ -582,11 +583,16 @@ _addenv (const char *name, const char *value, int overwrite) else { /* Create new slot. */ int sz = envsize (cur_environ ()); + + /* Allocate space for two new slots even though only one is needed. + According to the commit message for commit ebd645e + (2001-10-03), this is done to "work around problems with some + buggy applications." */ int allocsz = sz + (2 * sizeof (char *)); offset = (sz - 1) / sizeof (char *); - /* Allocate space for additional element plus terminating NULL. */ + /* Allocate space for additional element. */ if (cur_environ () == lastenviron) lastenviron = __cygwin_environ = (char **) realloc (cur_environ (), allocsz); |