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Full Discussion: Fdisk and grep command not working in udev trigger
Top Forums Shell Programming and Scripting Fdisk and grep command not working in udev trigger Post 303023202 by Scott on Wednesday 12th of September 2018 09:26:52 PM
Old 09-12-2018
OK, well apologies for the slight tangent I sent us off on, but again it comes back to this "DEVNAME" thing.

Before, or after, when you call fdisk..

Code:
DEVNAME=$(fdisk -l |grep FAT16 |awk '{print $1}')

can you add some debug to the log file?

Code:
fdisk -l |grep FAT16 |awk '{print $1}' 2>&1 >> $LOG_FILE

It seems that's not doing what you think it should be. Again, as previously suggested, you should fully qualify the commands (/usr/bin/grep, etc.) - shouldn't make any assumptions about the environment udev is using when it does stuff.

If you change all of the ">> $LOG_FILE" to "&>> $LOG_FILE", you'll also log all the errors, if there are any.
 

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LEARN ABOUT MINIX

zgrep

ZGREP(1)                                                      General Commands Manual                                                     ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep  options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

                                                                                                                                          ZGREP(1)
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