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Full Discussion: check if two files exists at the same time in one location
Top Forums UNIX for Dummies Questions & Answers check if two files exists at the same time in one location Post 302593592 by rbatte1 on Friday 27th of January 2012 12:29:02 PM
Old 01-27-2012
I dont think you need the inner [ & ], so:-
Code:
if [ ! -f out1.txt -a ! -f out2.txt ]; then
   echo "both files not found"
fi

.....unless BASH is very different to sh, ksh etc. It is one if statement with an and in it. You might want to carefully consider your logic though. Here, you are saying if out1.txt and out2.txt both do not exist, then display the message. If one exists, you would not get the message. Is that what you want?

If you are checking that both should exist, then you could consider:-
  • If out1.txt does not exist or out2.txt does not exist, then error
  • If out1.txt and out2.txt both exist, continue, else error
These might be better. It just depends what you want to acheive.



I hope that this helps,

Robin
Liverpool/Blackburn
UK
Last edited by rbatte1; 01-27-2012 at 01:30 PM.. Reason: Highlighting
 

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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)
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