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Fix setenv and unsetenv corner cases.

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* environ.cc (setenv): Detect invalid argument.
(unsetenv): Distinguish EFAULT from EINVAL.
This commit is contained in:
Eric Blake
2009-11-16 20:05:49 +00:00
parent 5074489a49
commit d01a44977f
2 changed files with 13 additions and 5 deletions
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13
winsup/cygwin/environ.cc
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@ -413,10 +413,11 @@ setenv (const char *name, const char *value, int overwrite)
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (!*name)
return 0;
if (*value == '=')
value++;
if (!name || !*name || strchr (name, '='))
{
set_errno (EINVAL);
return -1;
}
return _addenv (name, value, !!overwrite);
}
@ -427,7 +428,9 @@ unsetenv (const char *name)
register char **e;
int offset;
myfault efault;
if (efault.faulted () || *name == '\0' || strchr (name, '='))
if (efault.faulted (EFAULT))
return -1;
if (!name || *name == '\0' || strchr (name, '='))
{
set_errno (EINVAL);
return -1;