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#1
May 14th, 2003, 07:35 AM
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Command to find a string in files
does somebody knows a command to find a string in all the files under a directory (and subdirectories)?
Perhaps a pipe ? With grep mystring filename and find . -name "*.conf" I tried it, but it is not working Thanks for any help JdV
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#2
May 14th, 2003, 12:54 PM
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I can't seem to think in shell, but the following Perl lines should work:
Code:
@files = `ls`;
foreach $file (@files) {
system "grep $string $file";
}
__________________
Two things have come out of Berkeley, Unix and LSD. It is uncertain which caused the other.
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#3
May 14th, 2003, 01:08 PM
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grep knows the parameter "-r" which is "recursive". Another interesting parameter for searching strings is "-i" which is "case insensitive".
i.e. Code:
# grep -ir "ftp" /var/log searches for the word "ftp" in all logfiles, and reports "ftp", "FTP", "Ftp", ...
__________________
-- Manuel Hirsch - Linux, FreeBSD, programming, administration articles, tutorials and more.
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#4
May 14th, 2003, 01:50 PM
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Jose:
There seems to be a little confusion over whether you are looking for a command-line command or a way to do the grep within a program. M.Hirsch's "grep -r" is the way from the command line. From within a program, you could use a pipe: Code:
FILE *fp;
char command[] = "grep -ir \"ftp\" /var/log";
char buffer[PIPE_BUF]; /* PIPE_BUF defined by system */
/* open the pipe to read */
fp = popen(command,"r");
/* read each line output by the command */
while ((fgets(buffer,PIPE_BUF,fp)) != NULL)
{
/* process the line of output */
}
pclose(fp);
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