Warning: main(/www/www/htdocs/style/globals.php) [function.main]: failed to open stream: No such file or directory in /www/www/docs/6.4.1/neutrino/lib_ref/u/unsetenv.html on line 1
Warning: main() [function.include]: Failed opening '/www/www/htdocs/style/globals.php' for inclusion (include_path='.:/www/www/common:/www/www/php/lib/php') in /www/www/docs/6.4.1/neutrino/lib_ref/u/unsetenv.html on line 1
Warning: main(/www/www/htdocs/style/header.php) [function.main]: failed to open stream: No such file or directory in /www/www/docs/6.4.1/neutrino/lib_ref/u/unsetenv.html on line 8
Warning: main() [function.include]: Failed opening '/www/www/htdocs/style/header.php' for inclusion (include_path='.:/www/www/common:/www/www/php/lib/php') in /www/www/docs/6.4.1/neutrino/lib_ref/u/unsetenv.html on line 8
Remove an environment variable
#include <stdlib.h>
void unsetenv( const char* name );
- name
- The name of the environment variable that you want to delete.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
The unsetenv() function removes the environment variable
named name from the process's environment.
POSIX 1003.1
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
Yes |
Thread |
Yes |
The unsetenv() function
manipulates the environment pointed to by the global
environ variable.
clearenv(),
getenv(),
putenv(),
setenv()
Warning: main(/www/www/htdocs/style/footer.php) [function.main]: failed to open stream: No such file or directory in /www/www/docs/6.4.1/neutrino/lib_ref/u/unsetenv.html on line 112
Warning: main() [function.include]: Failed opening '/www/www/htdocs/style/footer.php' for inclusion (include_path='.:/www/www/common:/www/www/php/lib/php') in /www/www/docs/6.4.1/neutrino/lib_ref/u/unsetenv.html on line 112