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March 4, 2017 10:16
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Quick and easy script created to be able to get the MD5 digest of a file on either Linux or SunOS
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| #!/bin/bash | |
| sysname=`uname -s` | |
| if [ "$sysname" = "SunOS" ]; then | |
| r=`which md5sum | grep '/md5sum'` | |
| if [ $r ]; then HAS_MD5SUM="1"; else HAS_MD5SUM="0"; fi | |
| r=`which digest | grep '/digest'` | |
| if [ $r ]; then HAS_DIGEST="1"; else HAS_DIGEST="0"; fi | |
| else | |
| r=`which md5sum &>/dev/null`; if [ "$?" = "0" ]; then HAS_MD5SUM="1"; else HAS_MD5SUM="0"; fi | |
| r=`which digest &>/dev/null`; if [ "$?" = "0" ]; then HAS_DIGEST="1"; else HAS_DIGEST="0"; fi | |
| fi | |
| if [ "$HAS_MD5SUM" = "1" ]; then | |
| md5sum $1 | cut -d ' ' -f1 | |
| elif [ "$HAS_DIGEST" = "1" ]; then | |
| digest -a md5 $1 | |
| else | |
| echo "Unable to generate file signature as no digest command could be found" | |
| exit 1 | |
| fi |
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If your wondering why the different code paths between Linux and SunOS was mainly due to the fact that under SunOS, the pipe out to
/dev/nulldid not work. Hence the usage of grep under SunOS.