classes/debian: clean up process spawning

This code is old and was of it's time, rewrite it to use modernish (we support
Python 3.4, so can't use subprocess.run()) subprocess and re idioms instead.

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 9 insertions, 10 deletions

diff --git a/meta/classes/debian.bbclass b/meta/classes/debian.bbclass
index edc6da1ba3..989ea8f8d2 100644
--- a/meta/classes/debian.bbclass
+++ b/meta/classes/debian.bbclass
@@ -25,7 +25,7 @@ python () {
 }
 
 python debian_package_name_hook () {
-    import glob, copy, stat, errno, re, pathlib
+    import glob, copy, stat, errno, re, pathlib, subprocess
 
     pkgdest = d.getVar("PKGDEST")
     packages = d.getVar('PACKAGES')
@@ -76,15 +76,14 @@ python debian_package_name_hook () {
             if path in libdirs:
                 has_libs = 1
                 if so_re.match(os.path.basename(f)):
-                    cmd = (d.getVar('TARGET_PREFIX') or "") + "objdump -p " + f + " 2>/dev/null"
-                    fd = os.popen(cmd)
-                    lines = fd.readlines()
-                    fd.close()
-                    for l in lines:
-                        m = re.match("\s+SONAME\s+([^\s]*)", l)
-                        if m and not m.group(1) in sonames:
-                            sonames.append(m.group(1))
-
+                    try:
+                        cmd = [d.expand("${TARGET_PREFIX}objdump"), "-p", f]
+                        output = subprocess.check_output(cmd).decode("utf-8")
+                        for m in re.finditer("\s+SONAME\s+([^\s]+)", output):
+                            if m.group(1) not in sonames:
+                                sonames.append(m.group(1))
+                    except subprocess.CalledProcessError:
+                        pass
         bb.debug(1, 'LIBNAMES: pkg %s libs %d bins %d sonames %s' % (orig_pkg, has_libs, has_bins, sonames))
         soname = None
         if len(sonames) == 1: