Add rc.conf.d support

This makes it possible to override settings in rc.conf by adding a
directory @SYSCONFDIR@/rc.conf.d and putting files in this directory.
The files will be processed in lexical order, and the last setting in
these files will be used.
This commit is contained in:
William Hubbs 2015-10-30 12:32:32 -05:00
parent 4cf6b0ecf7
commit c09eeca491
3 changed files with 110 additions and 0 deletions

View File

@ -184,6 +184,12 @@ unset _conf_d
# Load any system overrides
sourcex -e "@SYSCONFDIR@/rc.conf"
if [ -d "@SYSCONFDIR@/rc.conf.d" ]; then
for _f in "@SYSCONFDIR@"/rc.conf.d/*.conf; do
sourcex -e "$_f"
done
fi
# load service supervisor functions
sourcex "@LIBEXECDIR@/sh/s6.sh"

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@ -28,6 +28,8 @@
* SUCH DAMAGE.
*/
#include <fnmatch.h>
#include "queue.h"
#include "librc.h"
@ -214,6 +216,69 @@ rc_config_list(const char *file)
}
librc_hidden_def(rc_config_list)
static void rc_config_set_value(RC_STRINGLIST *config, char *value)
{
RC_STRING *cline;
char *entry;
size_t i = 0;
char *newline;
char *p = value;
bool replaced;
char *token;
if (! p)
return;
if (strncmp(p, "export ", 7) == 0)
p += 7;
if (! (token = strsep(&p, "=")))
return;
entry = xstrdup(token);
/* Preserve shell coloring */
if (*p == '$')
token = value;
else
do {
/* Bash variables are usually quoted */
token = strsep(&p, "\"\'");
} while (token && *token == '\0');
/* Drop a newline if that's all we have */
if (token) {
i = strlen(token) - 1;
if (token[i] == '\n')
token[i] = 0;
i = strlen(entry) + strlen(token) + 2;
newline = xmalloc(sizeof(char) * i);
snprintf(newline, i, "%s=%s", entry, token);
} else {
i = strlen(entry) + 2;
newline = xmalloc(sizeof(char) * i);
snprintf(newline, i, "%s=", entry);
}
replaced = false;
/* In shells the last item takes precedence, so we need to remove
any prior values we may already have */
TAILQ_FOREACH(cline, config, entries) {
i = strlen(entry);
if (strncmp(entry, cline->value, i) == 0 && cline->value[i] == '=') {
/* We have a match now - to save time we directly replace it */
free(cline->value);
cline->value = newline;
replaced = true;
break;
}
}
if (!replaced) {
rc_stringlist_add(config, newline);
free(newline);
}
free(entry);
}
/*
* Override some specific rc.conf options on the kernel command line
*/
@ -272,6 +337,42 @@ static RC_STRINGLIST *rc_config_override(RC_STRINGLIST *config)
}
#endif
static RC_STRINGLIST * rc_config_directory(RC_STRINGLIST *config)
{
DIR *dp;
struct dirent *d;
RC_STRINGLIST *rc_conf_d_files = rc_stringlist_new();
RC_STRING *fname;
RC_STRINGLIST *rc_conf_d_list;
char path[PATH_MAX];
RC_STRING *line;
if ((dp = opendir(RC_CONF_D)) != NULL) {
while ((d = readdir(dp)) != NULL) {
if (fnmatch("*.conf", d->d_name, FNM_PATHNAME) == 0) {
rc_stringlist_addu(rc_conf_d_files, d->d_name);
}
}
closedir(dp);
if (rc_conf_d_files) {
rc_stringlist_sort(&rc_conf_d_files);
TAILQ_FOREACH(fname, rc_conf_d_files, entries) {
if (! fname->value)
continue;
sprintf(path, "%s/%s", RC_CONF_D, fname->value);
rc_conf_d_list = rc_config_list(path);
TAILQ_FOREACH(line, rc_conf_d_list, entries)
if (line->value)
rc_config_set_value(config, line->value);
rc_stringlist_free(rc_conf_d_list);
}
rc_stringlist_free(rc_conf_d_files);
}
}
return config;
}
RC_STRINGLIST *
rc_config_load(const char *file)
{
@ -401,6 +502,8 @@ rc_conf_value(const char *setting)
#endif
}
rc_conf = rc_config_directory(rc_conf);
/* Convert old uppercase to lowercase */
TAILQ_FOREACH(s, rc_conf, entries) {
p = s->value;

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@ -56,6 +56,7 @@ extern "C" {
#define RC_SYS_WHITELIST RC_LIBEXECDIR "/conf.d/env_whitelist"
#define RC_USR_WHITELIST RC_SYSCONFDIR "/conf.d/env_whitelist"
#define RC_CONF RC_SYSCONFDIR "/rc.conf"
#define RC_CONF_D RC_SYSCONFDIR "/rc.conf.d"
#define RC_CONF_OLD RC_SYSCONFDIR "/conf.d/rc"
#define RC_PATH_PREFIX RC_LIBEXECDIR "/bin:/bin:/sbin:/usr/bin:/usr/sbin"