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ui/keymaps: Fix handling of erroneous include files 

While errors in the keyboard layout named with -k are fatal, errors in
included files are reported, but otherwise ignored:

    $ cat worst
    include bad
    include worse
    $ ls -l bad worse
    ls: cannot access 'bad': No such file or directory
    ls: cannot access 'worse': No such file or directory
    $ qemu-system-x86_64 -nodefaults -S -monitor stdio -display vnc=:0 -k bad
    QEMU 3.0.50 monitor - type 'help' for more information
    (qemu) Could not read keymap file: 'bad'
    $ qemu-system-x86_64 -nodefaults -S -monitor stdio -display vnc=:0 -k worst
    QEMU 3.0.50 monitor - type 'help' for more information
    (qemu) Could not read keymap file: 'bad'
    Could not read keymap file: 'worse'

Fix that.

Note that parse_keyboard_layout() allocates the keymap, except when
it's parsing an include file.  To keep error handling simple, move the
memory management to its caller init_keyboard_layout().

Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20181017082702.5581-26-armbru@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Markus Armbruster 2018-10-17 10:26:49 +02:00
parent cd65f34991
commit f7b9e299a4
1 changed files with 23 additions and 12 deletions
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35
ui/keymaps.c
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@ -79,10 +79,11 @@ static void add_keysym(char *line, int keysym, int keycode, kbd_layout_t *k)
trace_keymap_add(keysym, keycode, line); trace_keymap_add(keysym, keycode, line);
} }
static kbd_layout_t *parse_keyboard_layout(const name2keysym_t *table, static int parse_keyboard_layout(kbd_layout_t *k,
const char *language, const name2keysym_t *table,
kbd_layout_t *k) const char *language)
{ {
int ret;
FILE *f; FILE *f;
char * filename; char * filename;
char line[1024]; char line[1024];
@ -95,12 +96,7 @@ static kbd_layout_t *parse_keyboard_layout(const name2keysym_t *table,
g_free(filename); g_free(filename);
if (!f) { if (!f) {
fprintf(stderr, "Could not read keymap file: '%s'\n", language); fprintf(stderr, "Could not read keymap file: '%s'\n", language);
return NULL; return -1;
}
if (!k) {
k = g_new0(kbd_layout_t, 1);
k->hash = g_hash_table_new(NULL, NULL);
} }
for(;;) { for(;;) {
@ -118,7 +114,10 @@ static kbd_layout_t *parse_keyboard_layout(const name2keysym_t *table,
continue; continue;
} }
if (!strncmp(line, "include ", 8)) { if (!strncmp(line, "include ", 8)) {
parse_keyboard_layout(table, line + 8, k); if (parse_keyboard_layout(k, table, line + 8) < 0) {
ret = -1;
goto out;
}
} else { } else {
int offset = 0; int offset = 0;
while (line[offset] != 0 && while (line[offset] != 0 &&
@ -164,15 +163,27 @@ static kbd_layout_t *parse_keyboard_layout(const name2keysym_t *table,
} }
} }
} }
ret = 0;
out:
fclose(f); fclose(f);
return k; return ret;
} }
kbd_layout_t *init_keyboard_layout(const name2keysym_t *table, kbd_layout_t *init_keyboard_layout(const name2keysym_t *table,
const char *language) const char *language)
{ {
return parse_keyboard_layout(table, language, NULL); kbd_layout_t *k;
k = g_new0(kbd_layout_t, 1);
k->hash = g_hash_table_new(NULL, NULL);
if (parse_keyboard_layout(k, table, language) < 0) {
g_hash_table_unref(k->hash);
g_free(k);
return NULL;
}
return k;
} }