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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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