Am 28.09.2009 21:07, schrieb Sharpe, Sam J:
2009/9/28 Kanwar Ranbir Sandhu<m3freak@xxxxxxxxxxxxxxxxxx>:
On Mon, 2009-09-28 at 19:33 +0100, Sharpe, Sam J wrote:
Yes, but it involves reading the man page for sed - I'm not totally
sure you are capable of doing that.
I suggest looking at the output of "man sed", finding the section
about the command "r" and then reading the next few lines.
Oh my word. I can't believe I missed that. So, I've solved my little
problem with this:
sed '/BB/R file2' file1
Sweet!
That alone doesn't fit your original specification:
[sam@samlap Desktop]$ sed -e '/BB/R file2' file1
AA
BB
BBBB1
CC
DD
AA
BB
BBBB2
CC
DD
You specified that BB was to be /replaced/ with BBBB1, so you will
need to do this:
[sam@samlap Desktop]$ sed -e '/BB/R file2' -e '/BB/d' file1
AA
BBBB1
CC
DD
AA
BBBB2
CC
DD
This code may fail in case file 2 contains a line with BB only,
in that case the replacement will be removed too. Enclosed
you will find my suggestion for a C program (still unchecked).
Joerg
#include <stdlib.h>
#define GNU_SOURCE
#include <stdio.h>
#include <string.h>
#define gettext(file)\
getline(&line,0,file);\
if(i=strlen(line)-1,line[i]=='\n')line[i]=(char)0;
int main(int argc,char **argv){
FILE *file1,*file2,*tempfile;
char *line=NULL;
int i;
if(argc<3)printf("usage: replace file1 file2\n");
file1=fopen(argv[1],"r");
file2=fopen(argv[2],"r");
tempfile=fopen("tempfile","w");
while(!feof(file1)){
gettext(file1);
if(!strcmp(line,"BB")){
free(line);line=NULL;
if(feof(file2)){
printf("unexpexted EOF in %s\n",argv[2]);
return 2;
}
gettext(file2);
}
fputs(line,tempfile);
putc('\n',tempfile);
free(line);line=NULL;
}
fclose(file1);
fclose(file2);
fclose(tempfile);
remove(argv[1]);
rename("tempfile",argv[1]);
return 0;
}
--
fedora-list mailing list
fedora-list@xxxxxxxxxx
To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
