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Homework and Emergencies Homework & Coursework Questions Unix find and head command help Post 302627975 by methyl on Sunday 22nd of April 2012 04:23:55 PM
Old 04-22-2012
This an interesting puzzle because I for one cannot come up with a simple solution which works on all modern unix and Linux O/S (the O/S was not stated) ... and which uses "find .... -exec".

In the commercial world we would use a construct which lets us do a sequence of commands within a do-done loop:
Code:
find /home/yourname/UnixCourse/ -type f -name "*.txt" -print | while read filename
do
     echo "${filename}"
     head -1 "${filename}"
done

I realise that this does not match you requirement because there is no "-exec" on the "find".

Ignoring those versions of the "find" command which support more than one command with "-exec", one must look at what "-exec" could run.
Hmm it could run a simple Shell script which displayed the filename and then displayed the first line of the file in question.
Just an idea, other posters may have better ideas.

Last edited by methyl; 04-22-2012 at 05:30 PM.. Reason: typos
 

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FIND(1) 						      General Commands Manual							   FIND(1)

NAME
find - find files meeting a given condition SYNOPSIS
find directory expression EXAMPLES
find / -name a.out -print # Print all a.out paths find /usr/ast ! -newer f -ok rm {} ; # Ask before removing find /usr -size +20 -exec mv {} /big ; # move files > 20 blks find / -name a.out -o -name '*.o' -exec rm {}; # 2 conds DESCRIPTION
Find descends the file tree starting at the given directory checking each file in that directory and its subdirectories against a predi- cate. If the predicate is true, an action is taken. The predicates may be connected by -a (Boolean and), -o (Boolean or) and ! (Boolean negation). Each predicate is true under the conditions specified below. The integer n may also be +n to mean any value greater than n, -n to mean any value less than n, or just n for exactly n. -name s true if current filename is s (include shell wild cards) -size n true if file size is n blocks -inum n true if the current file's i-node number is n -mtime ntrue if modification time relative to today (in days) is n -links ntrue if the number of links to the file is n -newer ftrue if the file is newer than f -perm n true if the file's permission bits = n (n is in octal) -user u true if the uid = u (a numerical value, not a login name) -group gtrue if the gid = g (a numerical value, not a group name) -type x where x is bcdfug (block, char, dir, regular file, setuid, setgid) -xdev do not cross devices to search mounted file systems Following the expression can be one of the following, telling what to do when a file is found: -print print the file name on standard output -exec execute a MINIX command, {} stands for the file name -ok prompts before executing the command SEE ALSO
test(1), xargs(1). FIND(1)
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