meta: replace os.popen with subprocess.Popen

Replace os.popen with subprocess.Popen since the older function would
fail (more or less) silently if the executed program cannot be found

There are both bb.process.run() and bb.process.Popen() which wraps the
subprocess module, use it for simplifying the code.

Note: We don't need the "2>/dev/null" or "2>&1" since bb.process.run()
can handle it, it will raise exception when error occurs, we should
handle the exception ourselves if we want to ignore the error.

More info:
http://docs.python.org/library/subprocess.html#subprocess-replacements

[YOCTO #2454]

(From OE-Core rev: e83d8e58a6b107eea87df0ec233a1bc932b2c6ea)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 10 insertions, 6 deletions

diff --git a/meta/classes/package.bbclass b/meta/classes/package.bbclass
index 41139ef921..bc83bfbf4e 100644
--- a/meta/classes/package.bbclass
+++ b/meta/classes/package.bbclass
@@ -1061,7 +1061,7 @@ python emit_pkgdata() {
 
         def get_directory_size(dir):
                 if os.listdir(dir):
-                        size = int(os.popen('du -sk %s' % dir).readlines()[0].split('\t')[0])
+                        size = int(bb.process.run('du -sk %s' % dir)[0].split('\t')[0])
                 else:
                         size = 0
                 return size
@@ -1221,7 +1221,7 @@ python package_do_filedeps() {
                                 rpfiles.append(os.path.join(root, file))
 
                 for files in chunks(rpfiles, 100):
-                        dep_pipe = os.popen(rpmdeps + " " + " ".join(files))
+                        dep_pipe = bb.process.Popen(rpmdeps + " " + " ".join(files), shell=True).stdout
 
                         process_deps(dep_pipe, pkg, provides_files, requires_files)
 
@@ -1263,11 +1263,15 @@ python package_do_shlibs() {
 
         def linux_so(root, path, file):
                 needs_ldconfig = False
-                cmd = d.getVar('OBJDUMP', True) + " -p " + pipes.quote(os.path.join(root, file)) + " 2>/dev/null"
+                cmd = d.getVar('OBJDUMP', True) + " -p " + pipes.quote(os.path.join(root, file))
                 cmd = "PATH=\"%s\" %s" % (d.getVar('PATH', True), cmd)
-                fd = os.popen(cmd)
-                lines = fd.readlines()
-                fd.close()
+                try:
+                        lines = ""
+                        lines = bb.process.run(cmd)[0]
+                # Some ".so" maybe ascii text, e.g: /usr/lib64/libpthread.so,
+                # ingore those errors.
+                except Exception:
+                        sys.exc_clear()
                 for l in lines:
                         m = re.match("\s+NEEDED\s+([^\s]*)", l)
                         if m: