diff options
Diffstat (limited to 'modutils/modprobe.c')
| -rw-r--r-- | modutils/modprobe.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/modutils/modprobe.c b/modutils/modprobe.c index 292f2df22..0cfb365b6 100644 --- a/modutils/modprobe.c +++ b/modutils/modprobe.c @@ -228,6 +228,39 @@ static const char *humanly_readable_name(struct module_entry *m) return m->probed_name ? m->probed_name : m->modname; } +static char *parse_and_add_kcmdline_module_options(char *options, const char *modulename) +{ + /* defined in arch/<architecture>/include/asm/setup.h + * (maximum is 2048 for IA64 and SPARC) */ + char kcmdline_buf[2048]; + char *kcmdline; + char *kptr; + int len; + + len = open_read_close("/proc/cmdline", kcmdline_buf, 2047); + if (len <= 0) + return options; + kcmdline_buf[len] = '\0'; + + len = strlen(modulename); + kcmdline = kcmdline_buf; + while ((kptr = strsep(&kcmdline, "\n\t ")) != NULL) { + if (strncmp(modulename, kptr, len) != 0) + continue; + kptr += len; + if (*kptr != '.') + continue; + /* It is "modulename.xxxx" */ + kptr++; + if (strchr(kptr, '=') != NULL) { + /* It is "modulename.opt=[val]" */ + options = gather_options_str(options, kptr); + } + } + + return options; +} + /* Return: similar to bb_init_module: * 0 on success, * -errno on open/read error, @@ -288,6 +321,7 @@ static int do_modprobe(struct module_entry *m) options = m2->options; m2->options = NULL; + options = parse_and_add_kcmdline_module_options(options, m2->modname); if (m == m2) options = gather_options_str(options, G.cmdline_mopts); rc = bb_init_module(fn, options); |