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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 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) && !strcmp(new->name+len, ".ko"))
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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