Unable To Get Result From Stdout With Subprocess

I need to get the result being displayed in the console after issuing a command. e.g.: H:/path/to/openssl.exe x509 -in H:/path/to/cert.pem -noout -subject This command produces val

Solution 1:

i am not used to use python on windows, but try the following. Don't use shell=True, instead try with this cmd:

cmd = ["H:/path/to/openssl.exe", "x509", "-in", "H:/path/to/cert.pem", "-noout", "-subject"]

Solution 2:

Have you tried storing the entire command as raw string and passing it with shell=True

cmd = r'H:/path/to/openssl.exe x509 -in H:/path/to/cert.pem -noout -subject' p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) out = p.communicate() print(out[0]) #for std out print(out[1]) # for std err

Edit: This worked for me with stderr,

print p.communicate()[1]

b'unable to load certificate\r\n3636:error:0D07209B:asn1 encoding routines:ASN1_ get_object:too long:./crypto/asn1/asn1_lib.c:142:\r\n3636:error:0D068066:asn1 en coding routines:ASN1_CHECK_TLEN:bad object header:./crypto/asn1/tasn_dec.c:1281: \r\n3636:error:0D07803A:asn1 encoding routines:ASN1_ITEM_EX_D2I:nested asn1 erro r:./crypto/asn1/tasn_dec.c:380:Type=X509\r\n3636:error:0906700D:PEM routines:PEM _ASN1_read_bio:ASN1 lib:./crypto/pem/pem_oth.c:83:\r\n'