eal: load only shared libs from driver plugin directories

When we pass a "-d" flag to EAL pointing to a directory, we attempt to load
all files in that directory as driver plugins, irrespective of file type.
This procludes using e.g. the build/drivers directory, as a driver source
since it contains static libs and other files as well as the shared
objects.

By filtering out any files whose filename does not end in ".so", we can
improve usability by allowing other non-driver files to be present in the
driver directory.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>

diff --git a/lib/librte_eal/common/eal_common_options.c b/lib/librte_eal/common/eal_common_options.c
index 75e8839..176a985 100644 (file)
--- a/lib/librte_eal/common/eal_common_options.c
+++ b/lib/librte_eal/common/eal_common_options.c
@@ -378,9 +378,15 @@ eal_plugindir_init(const char *path)
 
        while ((dent = readdir(d)) != NULL) {
                struct stat sb;
+               int nlen = strnlen(dent->d_name, sizeof(dent->d_name));
+
+               /* check if name ends in .so */
+               if (strcmp(&dent->d_name[nlen - 3], ".so") != 0)
+                       continue;
 
                snprintf(sopath, sizeof(sopath), "%s/%s", path, dent->d_name);
 
+               /* if a regular file, add to list to load */
                if (!(stat(sopath, &sb) == 0 && S_ISREG(sb.st_mode)))
                        continue;