118 lines
2.8 KiB
C
118 lines
2.8 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_BIN))
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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 kernrelease] [-F field] [modulename...]
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Display module fields for all specified modules, looking in
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<basedir>/lib/modules/<kernrelease>/ (kernrelease defaults to uname -r).
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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 *field;
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char *knam;
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char *base;
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long mod;
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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.field) xprintf("%s:%*c", field, 15-(int)strlen(field), ' ');
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else if (strcmp(TT.field, field)) return;
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xprintf("%s", value);
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xputc((toys.optflags & 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, len, i;
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char *buf = 0, *pos, *modinfo_tags[] = {
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"alias", "license", "description", "author", "firmware",
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"vermagic", "srcversion", "intree", "depends", "parm",
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"parmtype",
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};
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if (-1 != (fd = open(full_name, O_RDONLY))) {
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len = fdlength(fd);
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if (!(buf = mmap(0, len, PROT_READ, MAP_SHARED, fd, 0))) 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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output_field("filename", full_name);
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for (pos = buf; pos < buf+len; pos++) {
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if (*pos) continue;
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for (i = 0; i < sizeof(modinfo_tags) / sizeof(*modinfo_tags); i++) {
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char *str = modinfo_tags[i];
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int len = strlen(str);
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if (!strncmp(pos+1, str, len) && pos[len+1] == '=')
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output_field(str, pos+len+2);
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}
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}
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munmap(buf, len);
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close(fd);
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}
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static int check_module(struct dirtree *new)
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{
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if (S_ISREG(new->st.st_mode)) {
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char *s;
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for (s = toys.optargs[TT.mod]; *s; s++) {
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int len = 0;
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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")) break;
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modinfo_file(s = dirtree_path(new, NULL));
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free(s);
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return DIRTREE_ABORT;
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}
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}
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return dirtree_notdotdot(new);
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}
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void modinfo_main(void)
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{
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for(TT.mod = 0; TT.mod<toys.optc; TT.mod++) {
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char *s = strstr(toys.optargs[TT.mod], ".ko");
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if (s && !s[3]) modinfo_file(toys.optargs[TT.mod]);
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else {
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struct utsname uts;
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if (uname(&uts) < 0) perror_exit("bad uname");
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if (snprintf(toybuf, sizeof(toybuf), "%s/lib/modules/%s",
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(toys.optflags & FLAG_b) ? TT.base : "",
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(toys.optflags & FLAG_k) ? TT.knam : uts.release) >= sizeof(toybuf))
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perror_exit("basedir/kernrelease too long");
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dirtree_read(toybuf, check_module);
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}
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}
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}
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