unsquashfs: add argument processing, file listing parameter

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 90 insertions, 0 deletions

diff --git a/unpack/list_files.c b/unpack/list_files.c
new file mode 100644
index 0000000..aaf0652
--- /dev/null
+++ b/unpack/list_files.c
@@ -0,0 +1,90 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+#include "unsquashfs.h"
+
+static void mode_to_str(uint16_t mode, char *p)
+{
+	switch (mode & S_IFMT) {
+	case S_IFDIR:  *(p++) = 'd'; break;
+	case S_IFCHR:  *(p++) = 'c'; break;
+	case S_IFBLK:  *(p++) = 'b'; break;
+	case S_IFREG:  *(p++) = '-'; break;
+	case S_IFLNK:  *(p++) = 'l'; break;
+	case S_IFSOCK: *(p++) = 's'; break;
+	case S_IFIFO:  *(p++) = 'p'; break;
+	default:       *(p++) = '?'; break;
+	}
+
+	*(p++) = (mode & S_IRUSR) ? 'r' : '-';
+	*(p++) = (mode & S_IWUSR) ? 'w' : '-';
+
+	switch (mode & (S_IXUSR | S_ISUID)) {
+	case S_IXUSR | S_ISUID: *(p++) = 's'; break;
+	case S_IXUSR:           *(p++) = 'x'; break;
+	case S_ISUID:           *(p++) = 'S'; break;
+	default:                *(p++) = '-'; break;
+	}
+
+	*(p++) = (mode & S_IRGRP) ? 'r' : '-';
+	*(p++) = (mode & S_IWGRP) ? 'w' : '-';
+
+	switch (mode & (S_IXGRP | S_ISGID)) {
+	case S_IXGRP | S_ISGID: *(p++) = 's'; break;
+	case S_IXGRP:           *(p++) = 'x'; break;
+	case S_ISGID:           *(p++) = 'S'; break;
+	case 0:                 *(p++) = '-'; break;
+	}
+
+	*(p++) = (mode & S_IROTH) ? 'r' : '-';
+	*(p++) = (mode & S_IWOTH) ? 'w' : '-';
+
+	switch (mode & (S_IXOTH | S_ISVTX)) {
+	case S_IXOTH | S_ISVTX: *(p++) = 't'; break;
+	case S_IXOTH:           *(p++) = 'x'; break;
+	case S_ISVTX:           *(p++) = 'T'; break;
+	case 0:                 *(p++) = '-'; break;
+	}
+
+	*p = '\0';
+}
+
+static int count_int_chars(unsigned int i)
+{
+	int count = 1;
+
+	while (i > 10) {
+		++count;
+		i /= 10;
+	}
+
+	return count;
+}
+
+void list_files(tree_node_t *node)
+{
+	int i, max_uid_chars = 0, max_gid_chars = 0;
+	char modestr[12];
+	tree_node_t *n;
+
+	if (S_ISDIR(node->mode)) {
+		for (n = node->data.dir->children; n != NULL; n = n->next) {
+			i = count_int_chars(n->uid);
+			max_uid_chars = i > max_uid_chars ? i : max_uid_chars;
+
+			i = count_int_chars(n->gid);
+			max_gid_chars = i > max_gid_chars ? i : max_gid_chars;
+		}
+
+		for (n = node->data.dir->children; n != NULL; n = n->next) {
+			mode_to_str(n->mode, modestr);
+
+			printf("%s %*u/%-*u %s\n", modestr,
+			       max_uid_chars, n->uid,
+			       max_gid_chars, n->gid, n->name);
+		}
+	} else {
+		mode_to_str(node->mode, modestr);
+
+		printf("%s %u/%u %s\n", modestr,
+		       node->uid, node->gid, node->name);
+	}
+}