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VISO: Fix segfault if a directory fails to be enumerated

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This commit is contained in:
RichardG867
2022-11-21 15:36:20 -03:00
parent 2cf20cb7b3
commit dadc6ee2a7
1 changed files with 76 additions and 72 deletions
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10
src/cdrom/cdrom_image_viso.c
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@@ -812,17 +812,17 @@ viso_init(const char *dirname, int *error)
while (dir) {
/* Open directory for listing. */
DIR *dirp = opendir(dir->path);
if (!dirp)
goto next_dir;
/* Iterate through this directory's children to determine the entry array size. */
size_t children_count = 3; /* include terminator, . and .. */
if (dirp) { /* create empty directory if opendir failed */
while ((readdir_entry = readdir(dirp))) {
/* Ignore . and .. pseudo-directories. */
if ((readdir_entry->d_name[0] == '.') && ((readdir_entry->d_name[1] == '\0') || (*((uint16_t *) &readdir_entry->d_name[1]) == '.')))
continue;
children_count++;
}
}
/* Grow array if needed. */
if (children_count > dir_entries_len) {
@@ -858,6 +858,7 @@ viso_init(const char *dirname, int *error)
}
/* Iterate through this directory's children again, making the entries. */
if (dirp) {
rewinddir(dirp);
while ((readdir_entry = readdir(dirp))) {
/* Ignore . and .. pseudo-directories. */
@@ -895,7 +896,7 @@ viso_init(const char *dirname, int *error)
if (dir == eltorito_dir) {
if (!stricmp(readdir_entry->d_name, "Boot-NoEmul.img")) {
eltorito_type = 0x00;
have_eltorito_entry:
have_eltorito_entry:
if (eltorito_entry)
eltorito_others_present = 1; /* flag that the boot code directory contains other files */
eltorito_entry = entry;
@@ -930,6 +931,9 @@ have_eltorito_entry:
cdrom_image_viso_log("[%08X] %s => [%-12s] %s\n", entry, dir->path, entry->name_short, entry->basename);
}
} else {
cdrom_image_viso_log("VISO: Failed to enumerate [%s], will be empty\n", dir->path);
}
/* Add terminator. */
dir_entries[children_count] = NULL;