udevtest: import uevent variables if possible

[elogind.git] / udevtest.c

diff --git a/udevtest.c b/udevtest.c
index 9d73996bcf19c95fa946caddf9de4eaaed73a43c..9868c9bcd3b4bb571023fda27a4f8b562c183d2d 100644 (file)
--- a/udevtest.c
+++ b/udevtest.c
@@ -24,6 +24,7 @@
 #include <unistd.h>
 #include <errno.h>
 #include <ctype.h>
+#include <fcntl.h>
 #include <signal.h>
 #include <syslog.h>
 #include <getopt.h>
@@ -48,6 +49,45 @@ void log_message (int priority, const char *format, ...)
 }
 #endif
 
+static int import_uevent_var(const char *devpath)
+{
+       char path[PATH_SIZE];
+       static char value[4096]; /* must stay, used with putenv */
+       ssize_t size;
+       int fd;
+       char *key;
+       char *next;
+       int rc = -1;
+
+       /* read uevent file */
+       strlcpy(path, sysfs_path, sizeof(path));
+       strlcat(path, devpath, sizeof(path));
+       strlcat(path, "/uevent", sizeof(path));
+       fd = open(path, O_RDONLY);
+       if (fd < 0)
+               goto out;
+       size = read(fd, value, sizeof(value));
+       close(fd);
+       if (size < 0)
+               goto out;
+       value[size] = '\0';
+
+       /* import keys into environment */
+       key = value;
+       while (key[0] != '\0') {
+               next = strchr(key, '\n');
+               if (next == NULL)
+                       goto out;
+               next[0] = '\0';
+               info("import into environment: '%s'", key);
+               putenv(key);
+               key = &next[1];
+       }
+       rc = 0;
+out:
+       return rc;
+}
+
 int main(int argc, char *argv[], char *envp[])
 {
        int force = 0;
@@ -142,10 +182,11 @@ int main(int argc, char *argv[], char *envp[])
        setenv("DEVPATH", udev->dev->devpath, 1);
        setenv("SUBSYSTEM", udev->dev->subsystem, 1);
        setenv("ACTION", udev->action, 1);
+       import_uevent_var(udev->dev->devpath);
 
        printf("This program is for debugging only, it does not run any program,\n"
-              "specified by a RUN key. It may show incorrect results, if rules\n"
-              "match against subsystem specfic kernel event variables.\n"
+              "specified by a RUN key. It may show incorrect results, because\n"
+              "some values may be different, or not available at a simulation run.\n"
               "\n");
 
        info("looking at device '%s' from subsystem '%s'", udev->dev->devpath, udev->dev->subsystem);