blob: a7e6b4bc745f7b5b8bea496e2a67776d5f820bbf [file] [log] [blame]
/* modinfo.c - Display module info
*
* Copyright 2012 Andre Renaud <andre@bluewatersys.com>
USE_MODINFO(NEWTOY(modinfo, "<1b:k:F:0", TOYFLAG_BIN))
config MODINFO
bool "modinfo"
default y
help
usage: modinfo [-0] [-b basedir] [-k kernrelease] [-F field] [modulename...]
Display module fields for all specified modules, looking in
<basedir>/lib/modules/<kernrelease>/ (kernrelease defaults to uname -r).
*/
#define FOR_modinfo
#include "toys.h"
GLOBALS(
char *field;
char *knam;
char *base;
long mod;
)
static void output_field(char *field, char *value)
{
if (!TT.field) xprintf("%s:%*c", field, 15-(int)strlen(field), ' ');
else if (strcmp(TT.field, field)) return;
xprintf("%s", value);
xputc((toys.optflags & FLAG_0) ? 0 : '\n');
}
static void modinfo_file(char *full_name)
{
int fd, len, i;
char *buf = 0, *pos, *modinfo_tags[] = {
"alias", "license", "description", "author", "firmware",
"vermagic", "srcversion", "intree", "depends", "parm",
"parmtype",
};
if (-1 != (fd = open(full_name, O_RDONLY))) {
len = fdlength(fd);
if (!(buf = mmap(0, len, PROT_READ, MAP_SHARED, fd, 0))) close(fd);
}
if (!buf) {
perror_msg("%s", full_name);
return;
}
output_field("filename", full_name);
for (pos = buf; pos < buf+len; pos++) {
if (*pos) continue;
for (i = 0; i < sizeof(modinfo_tags) / sizeof(*modinfo_tags); i++) {
char *str = modinfo_tags[i];
int len = strlen(str);
if (!strncmp(pos+1, str, len) && pos[len+1] == '=')
output_field(str, pos+len+2);
}
}
munmap(buf, len);
close(fd);
}
static int check_module(struct dirtree *new)
{
if (S_ISREG(new->st.st_mode)) {
char *s;
for (s = toys.optargs[TT.mod]; *s; s++) {
int len = 0;
// 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")) break;
modinfo_file(s = dirtree_path(new, NULL));
free(s);
return DIRTREE_ABORT;
}
}
return dirtree_notdotdot(new);
}
void modinfo_main(void)
{
for(TT.mod = 0; TT.mod<toys.optc; TT.mod++) {
char *s = strstr(toys.optargs[TT.mod], ".ko");
if (s && !s[3]) modinfo_file(toys.optargs[TT.mod]);
else {
struct utsname uts;
if (uname(&uts) < 0) perror_exit("bad uname");
if (snprintf(toybuf, sizeof(toybuf), "%s/lib/modules/%s",
(toys.optflags & FLAG_b) ? TT.base : "",
(toys.optflags & FLAG_k) ? TT.knam : uts.release) >= sizeof(toybuf))
perror_exit("basedir/kernrelease too long");
dirtree_read(toybuf, check_module);
}
}
}