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xargs: implement -n 

Signed-off-by: Hiltjo Posthuma <hiltjo@codemadness.org>
This commit is contained in:
Hiltjo Posthuma 2014-04-09 17:35:29 +02:00 committed by sin
parent 6dd138613e
commit 1be58188ad
1 changed files with 19 additions and 5 deletions
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24
xargs.c
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@ -26,14 +26,15 @@ static char *cmd[NARGS];
static char *argb;
static size_t argbsz;
static size_t argbpos;
static long maxargs = 0;
static int nerrors = 0;
static char *eofstr;
static int rflag = 0;
static int rflag = 0, nflag = 0;
static void
usage(void)
{
eprintf("usage: %s [-r] [-E eofstr] [cmd [arg...]]\n", argv0);
eprintf("usage: %s [n maxargs] [-r] [-E eofstr] [cmd [arg...]]\n", argv0);
}
int
@ -42,9 +43,14 @@ main(int argc, char *argv[])
int leftover;
long argsz, argmaxsz;
char *arg;
int i;
int i, a;
ARGBEGIN {
case 'n':
nflag = 1;
if((maxargs = strtol(EARGF(usage()), NULL, 10)) <= 0)
eprintf("%s: value for -n option should be >= 1\n", argv0);
break;
case 'r':
rflag = 1;
break;
@ -63,7 +69,7 @@ main(int argc, char *argv[])
leftover = 0;
do {
argsz = 0; i = 0;
argsz = 0; i = 0; a = 0;
if (argc > 0) {
for (; i < argc; i++) {
cmd[i] = strdup(argv[i]);
@ -85,10 +91,18 @@ main(int argc, char *argv[])
cmd[i] = strdup(arg);
argsz += strlen(cmd[i]) + 1;
i++;
a++;
leftover = 0;
if(nflag == 1 && a >= maxargs)
break;
}
cmd[i] = NULL;
if (i == 1 && rflag == 1); else spawn();
if(a >= maxargs && nflag == 1)
spawn();
else if(!a || (i == 1 && rflag == 1))
;
else
spawn();
for (; i >= 0; i--)
free(cmd[i]);
} while (arg);