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/* modinfo.c - Display module info
*
* Copyright 2012 Andre Renaud <andre@bluewatersys.com>
*
* TODO: cleanup
USE_MODINFO(NEWTOY(modinfo, "<1b:k:F:0", TOYFLAG_SBIN))
config MODINFO
bool "modinfo"
default y
help
usage: modinfo [-0] [-b basedir] [-k kernel] [-F field] [module|file...]
Display module fields for modules specified by name or .ko path.
-F Only show the given field
-0 Separate fields with NUL rather than newline
-b Use <basedir> as root for /lib/modules/
-k Look in given directory under /lib/modules/
*/
#define FOR_modinfo
#include "toys.h"
GLOBALS(
char *F, *k, *b;
long mod;
int count;
)
static void output_field(char *field, char *value)
{
if (!TT.F) xprintf("%s:%*c", field, 15-(int)strlen(field), ' ');
else if (strcmp(TT.F, field)) return;
xprintf("%s", value);
xputc(FLAG(0) ? 0 : '\n');
}
static void modinfo_file(char *full_name)
{
int fd, flen, i;
char *buf = 0, *end, *modinfo_tags[] = {
"license", "author", "description", "firmware", "alias", "srcversion",
"depends", "retpoline", "intree", "name", "vermagic", "parm", "parmtype",
};
if (-1 != (fd = open(full_name, O_RDONLY))) {
flen = fdlength(fd);
buf = xmmap(0, flen, PROT_READ, MAP_SHARED, fd, 0);
end = buf + flen;
close(fd);
}
if (!buf) {
perror_msg_raw(full_name);
return;
}
TT.count++;
output_field("filename", full_name);
for (i=0; i<ARRAY_LEN(modinfo_tags); i++) {
char *field = modinfo_tags[i], *p = buf;
int slen = sprintf(toybuf, "%s=", field);
while (p && p < end) {
p = memmem(p, end-p, toybuf, slen);
if (p) output_field(field, p += slen);
}
}
munmap(buf, flen);
}
static int check_module(struct dirtree *new)
{
char *s;
int len;
if (!dirtree_notdotdot(new)) return 0;
if (!S_ISREG(new->st.st_mode)) return DIRTREE_RECURSE;
s = toys.optargs[TT.mod];
// The kernel treats - and _ the same, so we should too.
for (len = 0; s[len]; len++) {
if (s[len] == '-' && new->name[len] == '_') continue;
if (s[len] == '_' && new->name[len] == '-') continue;
if (s[len] != new->name[len]) break;
}
if (s[len] || strcmp(new->name+len, ".ko")) return DIRTREE_RECURSE;
modinfo_file(s = dirtree_path(new, 0));
free(s);
return DIRTREE_ABORT;
}
void modinfo_main(void)
{
struct utsname uts;
// Android (as shipped by Google) currently only has modules on /vendor.
// Android does not support multiple sets of modules for different kernels.
if (CFG_TOYBOX_ON_ANDROID) {
if (!TT.b) TT.b = "/vendor";
if (!TT.k) TT.k = "";
} else {
uname(&uts);
if (!TT.b) TT.b = "";
if (!TT.k) TT.k = uts.release;
}
for (TT.mod = 0; TT.mod<toys.optc; TT.mod++) {
if (strend(toys.optargs[TT.mod], ".ko")) modinfo_file(toys.optargs[TT.mod]);
else {
char *path = xmprintf("%s/lib/modules/%s", TT.b, TT.k);
TT.count = 0;
dirtree_read(path, check_module);
if (!TT.count) error_msg("%s: not found", toys.optargs[TT.mod]);
free(path);
}
}
}
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