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