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cli: util function to parse command-line arguments

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nmc_parse_args() - parse command-line arguments
This commit is contained in:
Jiří Klimeš 2013-01-16 12:26:45 +01:00 committed by Dan Williams
parent 9ddd7bc2dc
commit e2d8ca7924
2 changed files with 85 additions and 0 deletions
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74
cli/src/utils.c
View file

@ -57,6 +57,80 @@ next_arg (int *argc, char ***argv)
return 0;
}
/*
* Helper function to parse command-line arguments.
* arg_arr: description of arguments to look for
* last: whether these are last expected arguments
* argc: command-line argument array
* argv: command-line argument array size
* error: error set on a failure (when FALSE is returned)
* Returns: TRUE on success, FALSE on an error and sets 'error'
*/
gboolean
nmc_parse_args (nmc_arg_t *arg_arr, gboolean last, int *argc, char ***argv, GError **error)
{
nmc_arg_t *p;
gboolean found;
gboolean have_mandatory;
g_return_val_if_fail (arg_arr != NULL, FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
while (*argc > 0) {
found = FALSE;
for (p = arg_arr; p->name; p++) {
if (strcmp (**argv, p->name) == 0) {
if (p->found) {
/* Don't allow repeated arguments, because the argument of the same
* name could be used later on the line for another purpose. Assume
* that's the case and return.
*/
return TRUE;
}
if (p->has_value) {
if (next_arg (argc, argv) != 0) {
g_set_error (error, NMCLI_ERROR, NMC_RESULT_ERROR_USER_INPUT,
_("Error: value for '%s' argument is required."), *(*argv-1));
return FALSE;
}
*(p->value) = **argv;
}
p->found = TRUE;
found = TRUE;
break;
}
}
if (!found) {
have_mandatory = TRUE;
for (p = arg_arr; p->name; p++) {
if (p->mandatory && !p->found) {
have_mandatory = FALSE;
break;
}
}
if (have_mandatory && !last)
return TRUE;
if (p && p->name)
g_set_error (error, NMCLI_ERROR, NMC_RESULT_ERROR_USER_INPUT,
_("Error: Argument '%s' was expected, but '%s' provided."), p->name, **argv);
else
g_set_error (error, NMCLI_ERROR, NMC_RESULT_ERROR_USER_INPUT,
_("Error: Unexpected argument '%s'"), **argv);
return FALSE;
}
next_arg (argc, argv);
}
return TRUE;
}
/*
* Convert SSID to a printable form.
* If it is an UTF-8 string, enclose it in quotes and return it.

11
cli/src/utils.h
View file

@ -24,9 +24,20 @@
#include "nmcli.h"
/* === Types === */
typedef struct {
const char *name;
gboolean has_value;
const char **value;
gboolean mandatory;
gboolean found;
} nmc_arg_t;
/* === Functions === */
int matches (const char *cmd, const char *pattern);
int next_arg (int *argc, char ***argv);
gboolean nmc_parse_args (nmc_arg_t *arg_arr, gboolean last, int *argc, char ***argv, GError **error);
char *ssid_to_printable (const char *str, gsize len);
char *nmc_ip4_address_as_string (guint32 ip, GError **error);
char *nmc_ip6_address_as_string (const struct in6_addr *ip, GError **error);