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-rw-r--r--toys/modinfo.c105
1 files changed, 105 insertions, 0 deletions
diff --git a/toys/modinfo.c b/toys/modinfo.c
new file mode 100644
index 00000000..0e32fc66
--- /dev/null
+++ b/toys/modinfo.c
@@ -0,0 +1,105 @@
+/* vi: set sw=4 ts=4:
+ *
+ * modinfo.c - Display module info
+ *
+ * Copyright 2012 Andre Renaud <andre@bluewatersys.com>
+ *
+
+USE_MODINFO(NEWTOY(modinfo, "<1F:0", TOYFLAG_BIN))
+
+config MODINFO
+ bool "modinfo"
+ default y
+ help
+ usage: modinfo [-0] [-F field] [modulename...]
+*/
+
+#include "toys.h"
+
+#define FLAG_0 (1 << 0)
+
+DEFINE_GLOBALS(
+ char *field;
+)
+#define TT this.modinfo
+
+static const char *modinfo_tags[] = {
+ "alias", "license", "description", "author", "vermagic",
+ "srcversion", "intree", "parm", "depends",
+};
+
+static void output_field(const char *field, const char *value)
+{
+ int len;
+
+ if (TT.field && strcmp(TT.field, field) != 0)
+ return;
+
+ len = strlen(field);
+
+ if (TT.field)
+ xprintf("%s", value);
+ else
+ xprintf("%s:%*s%s",
+ field, 15 - len, "", value);
+ if (toys.optflags & FLAG_0)
+ xwrite(fileno(stdout), "\0", 1);
+ else
+ xputs("");
+}
+
+
+static void modinfo_file(struct dirtree *dir)
+{
+ int fd, len, i;
+ char *buf, *pos;
+ char *full_name;
+
+ full_name = dirtree_path(dir, NULL);
+
+ output_field("filename", full_name);
+ fd = xopen(full_name, O_RDONLY);
+ len = fdlength(fd);
+ buf = xmalloc(len);
+ xreadall(fd, buf, len);
+
+ for (pos = buf; pos < buf + len + 10; pos++) {
+ if (*pos)
+ continue;
+
+ for (i = 0; i < sizeof(modinfo_tags) / sizeof(modinfo_tags[0]); i++) {
+ const char *str = modinfo_tags[i];
+ int len = strlen(str);
+ if (strncmp(pos + 1, str, len) == 0 && pos[len + 1] == '=')
+ output_field(str, &pos[len + 2]);
+ }
+ }
+
+ free(full_name);
+ free(buf);
+ close(fd);
+}
+
+static int check_module(struct dirtree *new)
+{
+ if (S_ISREG(new->st.st_mode)) {
+ char **s;
+ for (s = toys.optargs; *s; s++) {
+ int len = strlen(*s);
+ if (strncmp(*s, new->name, len) == 0 &&
+ strcmp(&new->name[len], ".ko") == 0)
+ modinfo_file(new);
+ }
+ }
+
+ return dirtree_notdotdot(new);
+}
+
+void modinfo_main(void)
+{
+ struct utsname uts;
+ if (uname(&uts) < 0)
+ perror_exit("unable to determine uname");
+ sprintf(toybuf, "/lib/modules/%s", uts.release);
+ dirtree_read(toybuf, check_module);
+}