Refactor rule/event/path handling - smdev - suckless mdev
(HTM) git clone git://git.suckless.org/smdev
(DIR) Log
(DIR) Files
(DIR) Refs
(DIR) README
(DIR) LICENSE
---
(DIR) commit dd397daae5b0314ad124195a67d02f0bf5cad009
(DIR) parent 4edeed89d479ba3a582913a577fbe315d53464fc
(HTM) Author: sin <sin@2f30.org>
Date: Fri, 23 Aug 2013 11:40:57 +0100
Refactor rule/event/path handling
Diffstat:
M smdev.c | 187 ++++++++++++++++---------------
1 file changed, 95 insertions(+), 92 deletions(-)
---
(DIR) diff --git a/smdev.c b/smdev.c
@@ -30,6 +30,7 @@ struct Event {
enum action action;
char *devpath;
char *devname;
+ struct Rule *Rule;
};
static struct pregentry {
@@ -39,10 +40,13 @@ static struct pregentry {
static int dohotplug(void);
static int matchrule(int ruleidx, char *devname);
-static void runrule(struct Event *ev, struct Rule *Rule);
+static void runrule(struct Rule *Rule);
static void parsepath(struct Rule *Rule, char *devpath, size_t sz,
char *devname);
static int createdev(struct Event *ev);
+static int doevent(struct Event *ev);
+static int craftev(struct Event *ev, enum action action,
+ char *sysfspath);
static void populatedev(const char *path);
static void
@@ -109,15 +113,7 @@ dohotplug(void)
ev.maj = estrtol(maj, 10);
ev.action = mapaction(action);
- switch (ev.action) {
- case ADD_ACTION:
- return createdev(&ev);
- default:
- eprintf("Unsupported action '%s'\n",
- ev.action);
- }
-
- return 0;
+ return doevent(&ev);
}
static int
@@ -144,30 +140,12 @@ matchrule(int ruleidx, char *devname)
}
static void
-runrule(struct Event *ev, struct Rule *Rule)
+runrule(struct Rule *Rule)
{
if (!Rule->cmd)
return;
- switch (Rule->cmd[0]) {
- case '*':
- switch (ev->action) {
- case ADD_ACTION:
- system(&Rule->cmd[1]);
- break;
- default:
- eprintf("Unsupported action '%s'\n",
- ev->action);
- }
- break;
- case '@':
- system(&Rule->cmd[1]);
- break;
- case '$':
- eprintf("Unsupported action '%s'\n", ev->action);
- default:
- eprintf("Invalid command '%s'\n", Rule->cmd);
- }
+ system(&Rule->cmd[1]);
}
static void
@@ -183,8 +161,6 @@ parsepath(struct Rule *Rule, char *devpath, size_t sz,
p = strchr(&Rule->path[1], '/');
if (p) {
if (Rule->path[strlen(Rule->path) - 1] == '/') {
- snprintf(buf, sizeof(buf), "/dev/%s",
- &Rule->path[1]);
snprintf(devpath, sz, "/dev/%s%s",
&Rule->path[1], devname);
} else {
@@ -193,20 +169,14 @@ parsepath(struct Rule *Rule, char *devpath, size_t sz,
eprintf("strdup:");
snprintf(buf, sizeof(buf), "/dev/%s", dirname(dirc));
free(dirc);
-
basec = strdup(&Rule->path[1]);
if (!basec)
eprintf("strdup:");
strlcpy(devname, basename(basec), sizeof(devname));
free(basec);
-
snprintf(devpath, sz, "%s/%s",
buf, devname);
}
- umask(022);
- if (mkpath(buf, 0755) < 0)
- eprintf("mkdir %s:", buf);
- umask(0);
} else {
strlcpy(devname, &Rule->path[1], sizeof(devname));
snprintf(devpath, sz, "/dev/%s", devname);
@@ -219,11 +189,13 @@ createdev(struct Event *ev)
struct Rule *Rule;
struct passwd *pw;
struct group *gr;
+ char *dirc;
char devpath[PATH_MAX];
char devname[PATH_MAX];
char buf[BUFSIZ];
int type;
- int i;
+
+ Rule = ev->Rule;
snprintf(buf, sizeof(buf), "%d:%d", ev->maj, ev->min);
type = devtype(buf);
@@ -232,78 +204,109 @@ createdev(struct Event *ev)
strlcpy(devname, ev->devname, sizeof(devname));
snprintf(devpath, sizeof(devpath), "/dev/%s", devname);
- for (i = 0; i < LEN(Rules); i++) {
- Rule = &Rules[i];
- if (matchrule(i, devname) < 0)
- continue;
+ if (Rule->path) {
+ parsepath(Rule, devpath, sizeof(devpath),
+ devname);
+ dirc = strdup(devpath);
+ if (!dirc)
+ eprintf("strdup:");
+ strlcpy(buf, dirname(dirc), sizeof(buf));
+ free(dirc);
+ umask(022);
+ if (mkpath(buf, 0755) < 0)
+ eprintf("mkdir %s:", buf);
+ umask(0);
+ }
- if (Rule->path)
- parsepath(Rule, devpath, sizeof(devpath),
- devname);
-
- /* Create the actual dev nodes */
- if (mknod(devpath, Rules[i].mode | type,
- makedev(ev->maj, ev->min)) < 0 &&
- errno != EEXIST)
- eprintf("mknod %s:", devpath);
-
- errno = 0;
- pw = getpwnam(Rules[i].user);
- if (errno)
- eprintf("getpwnam %s:", Rules[i].user);
- else if (!pw)
- enprintf(1, "getpwnam %s: no such user\n",
- Rules[i].user);
-
- errno = 0;
- gr = getgrnam(Rules[i].group);
- if (errno)
- eprintf("getgrnam %s:", Rules[i].group);
- else if (!gr)
- enprintf(1, "getgrnam %s: no such group\n",
- Rules[i].group);
-
- if (chown(devpath, pw->pw_uid, gr->gr_gid) < 0)
- eprintf("chown %s:", devpath);
-
- /* Create symlinks */
- if (Rule->path && Rule->path[0] == '>') {
- snprintf(buf, sizeof(buf), "/dev/%s", ev->devname);
- if (symlink(devpath, buf))
- eprintf("symlink %s -> %s:",
- ev->devname, devpath);
- }
+ /* Create the actual dev nodes */
+ if (mknod(devpath, Rule->mode | type,
+ makedev(ev->maj, ev->min)) < 0 &&
+ errno != EEXIST)
+ eprintf("mknod %s:", devpath);
+
+ errno = 0;
+ pw = getpwnam(Rule->user);
+ if (errno)
+ eprintf("getpwnam %s:", Rule->user);
+ else if (!pw)
+ enprintf(1, "getpwnam %s: no such user\n",
+ Rule->user);
+
+ errno = 0;
+ gr = getgrnam(Rule->group);
+ if (errno)
+ eprintf("getgrnam %s:", Rule->group);
+ else if (!gr)
+ enprintf(1, "getgrnam %s: no such group\n",
+ Rule->group);
+
+ if (chown(devpath, pw->pw_uid, gr->gr_gid) < 0)
+ eprintf("chown %s:", devpath);
+
+ /* Create symlinks */
+ if (Rule->path && Rule->path[0] == '>') {
+ snprintf(buf, sizeof(buf), "/dev/%s", ev->devname);
+ if (symlink(devpath, buf))
+ eprintf("symlink %s -> %s:",
+ ev->devname, devpath);
+ }
+
+ snprintf(buf, sizeof(buf), "SMDEV=%s", devpath);
+ if (putenv(buf) < 0)
+ eprintf("putenv:");
+
+ runrule(Rule);
- snprintf(buf, sizeof(buf), "SMDEV=%s", devpath);
- if (putenv(buf) < 0)
- eprintf("putenv:");
+ return 0;
+}
+
+static int
+doevent(struct Event *ev)
+{
+ int i;
- runrule(ev, Rule);
+ for (i = 0; i < LEN(Rules); i++) {
+ if (matchrule(i, ev->devname) < 0)
+ continue;
+ ev->Rule = &Rules[i];
+ switch (ev->action) {
+ case ADD_ACTION:
+ return createdev(ev);
+ default:
+ break;
+ }
break;
}
+ return 0;
+}
+static int
+craftev(struct Event *ev, enum action action, char *sysfspath)
+{
+ char path[PATH_MAX];
+
+ ev->action = action;
+ ev->devpath = sysfspath + strlen("/sys");
+ ev->devname = basename(sysfspath);
+ snprintf(path, sizeof(path), "/sys%s/dev",
+ ev->devpath);
+ if (devtomajmin(path, &ev->maj, &ev->min) < 0)
+ return -1;
return 0;
}
static void
populatedev(const char *path)
{
- char tmppath[PATH_MAX];
char *cwd;
struct Event ev;
recurse(path, populatedev);
if (!strcmp(path, "dev")) {
cwd = agetcwd();
- ev.action = ADD_ACTION;
- ev.devpath = cwd + strlen("/sys");
- ev.devname = basename(cwd);
- snprintf(tmppath, sizeof(tmppath), "/sys%s/dev",
- ev.devpath);
- if (devtomajmin(tmppath, &ev.maj, &ev.min) < 0)
- return;
- createdev(&ev);
+ if (!craftev(&ev, ADD_ACTION, cwd))
+ doevent(&ev);
free(cwd);
}
}