explain_setenv_or_die − change or add an environment variable and report errors
#include <libexplain/setenv.h>
void explain_setenv_or_die(const char *name, const char *value, int overwrite);
int explain_setenv_on_error(const char *name, const char *value, int overwrite);
The explain_setenv_or_die function is used to call the setenv(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_setenv(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_setenv_on_error function is used to call the setenv(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_setenv(3) function, but still returns to the caller.
name |
The name, exactly as to be passed to the setenv(3) system call. |
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value |
The value, exactly as to be passed to the setenv(3) system call. |
overwrite
The overwrite, exactly as to be passed to the setenv(3) system call.
The explain_setenv_or_die function only returns on success, see setenv(3) for more information. On failure, prints an explanation and exits, it does not return.
The explain_setenv_on_error function always returns the value return by the wrapped setenv(3) system call.
The explain_setenv_or_die function is intended to be used in a fashion similar to the following example:
explain_setenv_or_die(name, value, overwrite);
change or add an environment variable
explain setenv(3) errors
terminate the calling process |
libexplain version 1.4
Copyright (C) 2010 Peter Miller