SETENV(3) Linux Programmer's Manual SETENV(3)
NAME
setenv - change or add an environment variableSYNOPSIS
#include <stdlib.h> int setenv(const char *name, const char *value, int overwrite); void unsetenv(const char *name);DESCRIPTION
The setenv() function adds the variable name to the envi- ronment with the value value, if name does not already exist. If name does exist in the environment, then its value is changed to value if overwrite is non-zero; if overwrite is zero, then the value of name is not changed. The unsetenv() function deletes the variable name from the environment.RETURN VALUE
The setenv() function returns zero on success, or -1 if there was insufficient space in the environment.CONFORMING TO
BSD 4.3
BSD April 4, 1993 1
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