...
| Wiki Markup |
|---|
According to C99 \[[ISO/IEC 9899:1999|AA. References#ISOBibliography#ISO/IEC 9899-1999]\] |
Wiki Markup In a hosted environment, the main function receives a third argument, {{char \*envp\[\]}}, that points to a null-terminated array of pointers to {{char}}, each of which points to a string that provides information about the environment for this execution of the program.
...
| Wiki Markup |
|---|
After a call to the POSIX {{setenv()}} function, or another function that modifies the environment, the {{envp}} pointer may no longer reference the environment. POSIX states that \[[Open Group 04|AA. References#OpenBibliography#Open Group 04]\] |
Unanticipated results may occur if
setenv()changes the external variableenviron. In particular, if the optionalenvpargument tomain()is present, it is not changed, and as a result may point to an obsolete copy of the environment (as may any other copy ofenviron).
...
| Wiki Markup |
|---|
According to the Visual C++ reference \[[MSDN|AA. References#MSDNBibliography#MSDN]\] |
The environment block passed to
mainandwmainis a "frozen" copy of the current environment. If you subsequently change the environment via a call toputenvor_wputenv, the current environment (as returned bygetenv/_wgetenvand the_environ/_wenvironvariable) will change, but the block pointed to byenvpwill not change.
...
| Wiki Markup |
|---|
\[[ISO/IEC 9899:1999|AA. References#ISOBibliography#ISO/IEC 9899-1999]\] Section J.5.1, "Environment Arguments" \[[MSDN|AA. References#MSDNBibliography#MSDN]\] [{{getenv, _wgetenv}}|http://msdn.microsoft.com/en-us/library/tehxacec.aspx], [{{_environ, _wenviron}}|http://msdn.microsoft.com/en-us/library/stxk41x1.aspx], [{{_putenv_s, _wputenv_s}}|http://msdn.microsoft.com/en-us/library/eyw7eyfw.aspx] \[[Open Group 04|AA. References#OpenBibliography#Open Group 04]\] [{{setenv()}}|http://www.opengroup.org/onlinepubs/009695399/functions/setenv.html] |
...