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/* 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...]
*/
#define FOR_modinfo
#include "toys.h"
GLOBALS(
char *field;
)
static char *modinfo_tags[] = {
"alias", "license", "description", "author", "firmware",
"vermagic", "srcversion", "intree", "parm", "depends",
};
static void output_field(char *field, char *value)
{
int len;
if (TT.field && strcmp(TT.field, field)) return;
len = strlen(field);
if (TT.field) xprintf("%s", value);
else xprintf("%s:%*s%s", field, 15 - len, "", value);
xputc((toys.optflags & FLAG_0) ? 0 : '\n');
}
static void modinfo_file(struct dirtree *dir)
{
int fd, len, i;
char *buf, *pos, *full_name;
full_name = dirtree_path(dir, NULL);
output_field("filename", full_name);
fd = xopen(full_name, O_RDONLY);
free(full_name);
len = fdlength(fd);
if (!(buf = mmap(0, len, PROT_READ, MAP_SHARED, fd, 0)))
perror_exit("mmap %s", 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 **ss;
for (ss = toys.optargs; *ss; ss++) {
char *s = *ss;
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(new);
}
}
return dirtree_notdotdot(new);
}
void modinfo_main(void)
{
struct utsname uts;
if (uname(&uts) < 0) perror_exit("bad uname");
sprintf(toybuf, "/lib/modules/%s", uts.release);
dirtree_read(toybuf, check_module);
}
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