static char *
nmc_readline_helper (const char *prompt)
{
char *str;
int b;
readline_mark:
/* We are in readline -> Ctrl-C should not quit nmcli */
nmc_set_in_readline (TRUE);
str = readline (prompt);
/* We are outside readline -> Ctrl-C should quit nmcli */
nmc_set_in_readline (FALSE);
/* Check for an I/O error by attempting to peek into the input buffer.
* Readline just inserts newlines when errors occur so we need to check ourselves. */
if (ioctl (0, FIONREAD, &b) == -1) {
g_free (str);
str = NULL;
}
/* Add string to the history */
if (str && *str)
add_history (str);
/*-- React on Ctrl-C and Ctrl-D --*/
/* We quit on Ctrl-D when line is empty */
if (str == NULL) {
/* Send SIGQUIT to itself */
nmc_set_sigquit_internal ();
kill (getpid (), SIGQUIT);
/* Sleep in this thread so that we don't do anything else until exit */
for (;;)
sleep (3);
}
/* Ctrl-C */
if (nmc_seen_sigint ()) {
nmc_clear_sigint ();
if (nm_cli.in_editor || *str) {
/* In editor, or the line is not empty */
/* Call readline again to get new prompt (repeat) */
g_free (str);
goto readline_mark;
} else {
/* Not in editor and line is empty */
/* Send SIGQUIT to itself */
nmc_set_sigquit_internal ();
kill (getpid (), SIGQUIT);
/* Sleep in this thread so that we don't do anything else until exit */
for (;;)
sleep (3);
}
}
/* Return NULL, not empty string */
if (str && *str == '\0') {
g_free (str);
str = NULL;
}
return str;
}
/**
* nmc_readline:
* @prompt_fmt: prompt to print (telling user what to enter). It is standard
* printf() format string
* @...: a list of arguments according to the @prompt_fmt format string
*
* Wrapper around libreadline's readline() function.
* If user pressed Ctrl-C, readline() is called again (if not in editor and
* line is empty, nmcli will quit).
* If user pressed Ctrl-D on empty line, nmcli will quit.
*
* Returns: the user provided string. In case the user entered empty string,
* this function returns NULL.
*/
char *
nmc_readline (const char *prompt_fmt, ...)
{
va_list args;
char *prompt, *str;
va_start (args, prompt_fmt);
prompt = g_strdup_vprintf (prompt_fmt, args);
va_end (args);
readline_mark:
/* We are in readline -> Ctrl-C should not quit nmcli */
nmc_set_in_readline (TRUE);
str = readline (prompt);
/* We are outside readline -> Ctrl-C should quit nmcli */
nmc_set_in_readline (FALSE);
/* Add string to the history */
if (str && *str)
add_history (str);
/*-- React on Ctrl-C and Ctrl-D --*/
/* We quit on Ctrl-D when line is empty */
if (str == NULL) {
/* Send SIGQUIT to itself */
nmc_set_sigquit_internal ();
kill (getpid (), SIGQUIT);
/* Sleep in this thread so that we don't do anything else until exit */
for (;;)
sleep (3);
}
/* Ctrl-C */
if (nmc_seen_sigint ()) {
nmc_clear_sigint ();
if (nm_cli.in_editor || *str) {
/* In editor, or the line is not empty */
/* Call readline again to get new prompt (repeat) */
g_free (str);
goto readline_mark;
} else {
/* Not in editor and line is empty */
/* Send SIGQUIT to itself */
nmc_set_sigquit_internal ();
kill (getpid (), SIGQUIT);
/* Sleep in this thread so that we don't do anything else until exit */
for (;;)
sleep (3);
}
}
g_free (prompt);
/* Return NULL, not empty string */
if (str && *str == '\0') {
g_free (str);
str = NULL;
}
return str;
}
static int
event_hook_for_readline (void)
{
/* Make readline() exit on SIGINT */
if (nmc_seen_sigint ()) {
rl_echo_signal_char (SIGINT);
rl_stuff_char ('\n');
}
return 0;
}
