Introduce struct rulepath - smdev - suckless mdev
(HTM) git clone git://git.suckless.org/smdev
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---
(DIR) commit 4e4ade53058e03ca944b5cafbbbe7384eecfea02
(DIR) parent dc0149bbdeb0eebac1636c4afa16906ef76d06b3
(HTM) Author: sin <sin@2f30.org>
Date: Tue, 27 Aug 2013 15:46:45 +0100
Introduce struct rulepath
Diffstat:
M smdev.c | 95 +++++++++++++++----------------
1 file changed, 46 insertions(+), 49 deletions(-)
---
(DIR) diff --git a/smdev.c b/smdev.c
@@ -39,11 +39,17 @@ static struct pregentry {
int cached;
} pregcache[LEN(rules)];
+/* The expanded/parsed path components of a rule */
+struct rulepath {
+ char path[PATH_MAX];
+ char name[PATH_MAX];
+};
+
static int dohotplug(void);
static int matchrule(int ruleidx, char *devname);
static void runrulecmd(struct rule *rule);
-static void parsepath(struct rule *rule, char *devpath,
- size_t devpathsz, char *devname, size_t devnamesz);
+static void parsepath(struct rule *rule, struct rulepath *rpath,
+ const char *devname);
static int removedev(struct event *ev);
static int createdev(struct event *ev);
static int doevent(struct event *ev);
@@ -157,20 +163,20 @@ runrulecmd(struct rule *rule)
system(&rule->cmd[1]);
}
-/*
- * Parse rule->path[] and set `devpath' to the absolute
- * path of the device node. If we have to rename the
- * device node then set `devname' to the new device name.
- *
- * `devname' is a copy of ev->devname.
- */
static void
-parsepath(struct rule *rule, char *devpath, size_t devpathsz,
- char *devname, size_t devnamesz)
+parsepath(struct rule *rule, struct rulepath *rpath,
+ const char *devname)
{
- char buf[BUFSIZ], *path;
+ char buf[PATH_MAX], *path;
char *dirc;
+ if (!rule->path) {
+ strlcpy(rpath->name, devname, sizeof(rpath->name));
+ snprintf(rpath->path, sizeof(rpath->path), "/dev/%s",
+ rpath->name);
+ return;
+ }
+
if (rule->path[0] != '=' && rule->path[0] != '>')
eprintf("Invalid path '%s'\n", rule->path);
@@ -178,8 +184,9 @@ parsepath(struct rule *rule, char *devpath, size_t devpathsz,
/* No need to rename the device node */
if (rule->path[strlen(rule->path) - 1] == '/') {
- snprintf(devpath, devpathsz, "/dev/%s%s",
+ snprintf(rpath->path, sizeof(rpath->path), "/dev/%s%s",
path, devname);
+ strlcpy(rpath->name, devname, sizeof(rpath->name));
return;
}
@@ -187,12 +194,14 @@ parsepath(struct rule *rule, char *devpath, size_t devpathsz,
if (!(dirc = strdup(path)))
eprintf("strdup:");
snprintf(buf, sizeof(buf), "/dev/%s", dirname(dirc));
- strlcpy(devname, basename(path), devnamesz);
- snprintf(devpath, devpathsz, "%s/%s", buf, devname);
+ strlcpy(rpath->name, basename(path), sizeof(rpath->name));
+ snprintf(rpath->path, sizeof(rpath->path), "%s/%s", buf,
+ rpath->name);
free(dirc);
} else {
- strlcpy(devname, path, devnamesz);
- snprintf(devpath, devpathsz, "/dev/%s", devname);
+ strlcpy(rpath->name, path, sizeof(rpath->name));
+ snprintf(rpath->path, sizeof(rpath->path), "/dev/%s",
+ rpath->name);
}
}
@@ -200,19 +209,14 @@ static int
removedev(struct event *ev)
{
struct rule *rule;
+ struct rulepath rpath;
char buf[PATH_MAX];
- char devpath[PATH_MAX];
- char devname[PATH_MAX];
rule = ev->rule;
- strlcpy(devname, ev->devname, sizeof(devname));
- snprintf(devpath, sizeof(devpath), "/dev/%s", devname);
- if (rule->path)
- parsepath(rule, devpath, sizeof(devpath),
- devname, sizeof(devname));
+ parsepath(rule, &rpath, ev->devname);
runrulecmd(rule);
/* Delete device node */
- unlink(devpath);
+ unlink(rpath.path);
/* Delete symlink */
if (rule->path && rule->path[0] == '>') {
snprintf(buf, sizeof(buf), "/dev/%s", ev->devname);
@@ -225,11 +229,10 @@ static int
createdev(struct event *ev)
{
struct rule *rule;
+ struct rulepath rpath;
struct passwd *pw;
struct group *gr;
char *dirc;
- char devpath[PATH_MAX];
- char devname[PATH_MAX];
char buf[BUFSIZ];
int type;
@@ -239,27 +242,21 @@ createdev(struct event *ev)
if ((type = devtype(buf)) < 0)
return -1;
- strlcpy(devname, ev->devname, sizeof(devname));
- snprintf(devpath, sizeof(devpath), "/dev/%s", devname);
-
/* Parse path and create the directory tree */
- if (rule->path) {
- parsepath(rule, devpath, sizeof(devpath),
- devname, sizeof(devname));
- if (!(dirc = strdup(devpath)))
- eprintf("strdup:");
- strlcpy(buf, dirname(dirc), sizeof(buf));
- free(dirc);
- umask(022);
- if (mkpath(buf, 0755) < 0)
- eprintf("mkdir %s:", buf);
- umask(0);
- }
+ parsepath(rule, &rpath, ev->devname);
+ if (!(dirc = strdup(rpath.path)))
+ eprintf("strdup:");
+ strlcpy(buf, dirname(dirc), sizeof(buf));
+ free(dirc);
+ umask(022);
+ if (mkpath(buf, 0755) < 0)
+ eprintf("mkdir %s:", buf);
+ umask(0);
- if (mknod(devpath, rule->mode | type,
+ if (mknod(rpath.path, rule->mode | type,
makedev(ev->major, ev->minor)) < 0 &&
errno != EEXIST)
- eprintf("mknod %s:", devpath);
+ eprintf("mknod %s:", rpath.path);
errno = 0;
pw = getpwnam(rule->user);
@@ -277,18 +274,18 @@ createdev(struct event *ev)
enprintf(1, "getgrnam %s: no such group\n",
rule->group);
- if (chown(devpath, pw->pw_uid, gr->gr_gid) < 0)
- eprintf("chown %s:", devpath);
+ if (chown(rpath.path, pw->pw_uid, gr->gr_gid) < 0)
+ eprintf("chown %s:", rpath.path);
if (rule->path && rule->path[0] == '>') {
/* ev->devname is the original device name */
snprintf(buf, sizeof(buf), "/dev/%s", ev->devname);
- if (symlink(devpath, buf) < 0)
+ if (symlink(rpath.path, buf) < 0)
eprintf("symlink %s -> %s:",
- buf, devpath);
+ buf, rpath.path);
}
- snprintf(buf, sizeof(buf), "SMDEV=%s", devpath);
+ snprintf(buf, sizeof(buf), "SMDEV=%s", rpath.path);
if (putenv(buf) < 0)
eprintf("putenv:");