Date: Thu, 06 Sep 2001 13:59:41 +0200 From: Sheldon Hearn <sheldonh@starjuice.net> To: audit@FreeBSD.org Subject: mixing -l and -p in split(1) Message-ID: <61597.999777581@axl.seasidesoftware.co.za>
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Hi folks,
I recently ran into a problem that would have been solved perfectly by
split(1) if said utility allowed the -l and -p options to be used in
conjunction.
The specific problem was the need to split a 4GB SMTP transcript into
4 files of approximately 1GB in size, to be passed as input into SMTP
socket connections.
The following patch allows -l and -p to be used together to mean
Split the input into chunks of no fewer than line_count lines
per chunk, but ensure that each chunk begins with a line that
matches pattern. If pattern does not appear regularly in the
input, chunks may be considerably larger than line_count lines.
Obviously, it's pretty easy to shot yourself up the ass with this one,
but if you know what you're doing, it's invaluable.
Ciao,
Sheldon.
Index: split.c
===================================================================
RCS file: /home/ncvs/src/usr.bin/split/split.c,v
retrieving revision 1.7
diff -u -d -r1.7 split.c
--- split.c 19 Nov 2000 01:44:20 -0000 1.7
+++ split.c 6 Sep 2001 11:18:02 -0000
@@ -147,7 +147,7 @@
if (*argv != NULL)
usage();
- if (pflag && (numlines != 0 || bytecnt != 0))
+ if (pflag && bytecnt != 0)
usage();
if (numlines == 0)
@@ -238,14 +238,17 @@
goto writeit;
/* Check if we need to start a new file */
- if (pflag) {
+ lcnt++;
+ if (pflag && lcnt >= numlines) {
regmatch_t pmatch;
pmatch.rm_so = 0;
pmatch.rm_eo = len - 1;
- if (regexec(&rgx, bfr, 0, &pmatch, REG_STARTEND) == 0)
+ if (regexec(&rgx, bfr, 0, &pmatch, REG_STARTEND) == 0) {
newfile();
- } else if (lcnt++ == numlines) {
+ lcnt = 1;
+ }
+ } else if (!pflag && lcnt == numlines) {
newfile();
lcnt = 1;
}
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