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Full Discussion: Simply Bash Script to Confirm that there are 2 Files in Same Folder
Top Forums Shell Programming and Scripting Simply Bash Script to Confirm that there are 2 Files in Same Folder Post 303027637 by RudiC on Thursday 20th of December 2018 04:12:09 PM
Old 12-20-2018
Quote:
Originally Posted by gull04
...
Code:
 ... 

 /-> find / -name a.txt -o -name A.txt -printf '%h\n'
/home/e434069
/->

As you can see there are implications for how you configure the find with the or option.
...
The reason for above single item output is "operator precedence". man find:
Quote:
Operators
Operators join together the other items within the expression. They include for example -o (meaning logical OR) and -a (meaning logical AND). Where an operator is missing, -a is assumed.
.
.
.
Please note that -a when specified implicitly (for example by two tests appearing without an explicit operator between them) or explicitly has higher precedence than -o. This means that find . -name afile -o -name bfile -print will never print afile.
So above command reads find / -name a.txt -o \(-name A.txt -printf '%h\n' \) as (implied) -a precedes -o. Run
Code:
$ find  \( -name a.txt -o -name A.txt \) -printf '%f\n'
A.txt
a.txt

to overcome the problem.
 

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LEARN ABOUT DEBIAN

x2sys_merge

X2SYS_MERGE(1gmt)					       Generic Mapping Tools						 X2SYS_MERGE(1gmt)

NAME

       x2sys_merge - Merge an updated COEs tables

SYNOPSIS

       x2sys_merge -Amain_COElist.d -Mnew_COElist.d

DESCRIPTION

       x2sys_merge  will read two crossovers data base and output the contents of the main one updated with the COEs in the second one. The second
       file should only contain updated COEs relatively to the first one.  That is, it MUST NOT contain any new  two  tracks  intersections  (This
       point  is  NOT checked in the code). This program is useful when, for any good reason like file editing NAV correction or whatever, one had
       to recompute only the COEs between the edited files and the rest of the database.

       -A     Specify the file main_COElist.d with the main crossover error data base.

       -M     Specify the file new_COElist.d with the newly computed crossover error data base.

OPTIONS

       No space between the option flag and the associated arguments.

       EXAMPLES
	      To update the main COE_data.txt with the new COEs estimations saved in the smaller COE_fresh.txt, try

	      x2sys_merge -ACOE_data.txt -MCOE_fresh.txt > COE_updated.txt

SEE ALSO

       x2sys_binlist(1), x2sys_cross(1), x2sys_datalist(1), x2sys_get(1), x2sys_init(1), x2sys_list(1), x2sys_put(1), x2sys_report(1)

GMT 4.5.7							    15 Jul 2011 						 X2SYS_MERGE(1gmt)
All times are GMT -4. The time now is 12:46 AM.
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