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interface-file: add and use report_error()

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This commit is contained in:
Ariadne Conill 2020-08-20 03:34:59 -06:00
parent a7dc005b8d
commit d36a522470
1 changed files with 53 additions and 12 deletions
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65
libifupdown/interface-file.c
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@ -14,6 +14,7 @@
*/
#include <ctype.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include "libifupdown/libifupdown.h"
@ -57,6 +58,37 @@ maybe_remap_token(const char *token)
return tokbuf;
}
/* map keywords to parser functions */
struct parser_keyword {
const char *token;
bool (*handle)(struct lif_dict *collection, struct lif_interface *cur_iface, const char *filename, size_t lineno, char *token, char *bufp);
};
static const struct parser_keyword keywords[] = {
};
static int
keyword_cmp(const void *a, const void *b)
{
const char *key = a;
const struct parser_keyword *token = b;
return strcmp(key, token->token);
}
static void
report_error(const char *filename, size_t lineno, const char *errfmt, ...)
{
char errbuf[4096];
va_list va;
va_start(va, errfmt);
vsnprintf(errbuf, sizeof errbuf, errfmt, va);
va_end(va);
fprintf(stderr, "%s:%zu: %s\n", filename, lineno, errbuf);
}
bool
lif_interface_file_parse(struct lif_dict *collection, const char *filename)
{
@ -68,15 +100,26 @@ lif_interface_file_parse(struct lif_dict *collection, const char *filename)
return false;
char linebuf[4096];
size_t lineno = 0;
while (lif_fgetline(linebuf, sizeof linebuf, f) != NULL)
{
lineno++;
char *bufp = linebuf;
char *token = lif_next_token(&bufp);
if (!*token || !isalpha(*token))
continue;
if (!strcmp(token, "source"))
const struct parser_keyword *parserkw =
bsearch(token, keywords, ARRAY_SIZE(keywords), sizeof(*keywords), keyword_cmp);
if (parserkw != NULL)
{
if (!parserkw->handle(collection, cur_iface, filename, lineno, token, bufp))
goto parse_error;
}
else if (!strcmp(token, "source"))
{
char *source_filename = lif_next_token(&bufp);
if (!*source_filename)
@ -84,8 +127,8 @@ lif_interface_file_parse(struct lif_dict *collection, const char *filename)
if (!strcmp(filename, source_filename))
{
fprintf(stderr, "%s: attempt to source %s would create infinite loop\n",
filename, source_filename);
report_error(filename, lineno, "attempt to source %s would create infinite loop",
source_filename);
goto parse_error;
}
@ -132,13 +175,13 @@ lif_interface_file_parse(struct lif_dict *collection, const char *filename)
if (!*token)
{
fprintf(stderr, "%s: inherits without interface\n", filename);
report_error(filename, lineno, "inherits without interface");
goto parse_error;
}
if (!lif_interface_collection_inherit(cur_iface, collection, token))
{
fprintf(stderr, "%s: could not inherit %s\n", filename, token);
report_error(filename, lineno, "could not inherit %s", token);
goto parse_error;
}
}
@ -152,7 +195,7 @@ lif_interface_file_parse(struct lif_dict *collection, const char *filename)
if (cur_iface == NULL)
{
fprintf(stderr, "%s: use '%s' without interface\n", filename, executor);
report_error(filename, lineno, "use '%s' without interface", executor);
goto parse_error;
}
@ -170,13 +213,13 @@ lif_interface_file_parse(struct lif_dict *collection, const char *filename)
if (!*token)
{
fprintf(stderr, "%s: inherits without interface\n", filename);
report_error(filename, lineno, "inherits without interface");
goto parse_error;
}
if (!lif_interface_collection_inherit(cur_iface, collection, token))
{
fprintf(stderr, "%s: could not inherit %s\n", filename, token);
report_error(filename, lineno, "could not inherit %s", token);
goto parse_error;
}
}
@ -186,7 +229,7 @@ lif_interface_file_parse(struct lif_dict *collection, const char *filename)
if (cur_iface == NULL)
{
fprintf(stderr, "%s: address '%s' without interface\n", filename, addr);
report_error(filename, lineno, "%s: address '%s' without interface", filename, addr);
goto parse_error;
}
@ -198,7 +241,7 @@ lif_interface_file_parse(struct lif_dict *collection, const char *filename)
if (cur_iface == NULL)
{
fprintf(stderr, "%s: gateway '%s' without interface\n", filename, addr);
report_error(filename, lineno, "%s: gateway '%s' without interface", filename, addr);
goto parse_error;
}
@ -233,8 +276,6 @@ lif_interface_file_parse(struct lif_dict *collection, const char *filename)
return true;
parse_error:
fprintf(stderr, "libifupdown: %s: failed to parse line \"%s\"\n",
filename, linebuf);
fclose(f);
return false;
}