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/*
* $Id: cmdf2argv.c,v 1.1 2005/04/13 17:00:29 baud Exp $
*/
/*
* Copyright (C) 1997 by CERN/IT/PDP/DM
* All rights reserved
*/
#ifndef lint
static char sccsid[] = "@(#)$RCSfile: cmdf2argv.c,v $ $Revision: 1.1 $ $Date: 2005/04/13 17:00:29 $ CERN/IT/PDP/DM Jean-Philippe Baud";
#endif /* not lint */
/* cmdf2argv - build argv array from a command file */
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <string.h>
cmdf2argv(cmdfil, argvp)
char *cmdfil;
char ***argvp;
{
char **argv;
char *buf;
int c;
int cmdfd;
int n;
int nargs;
char *p;
int parm;
struct stat st;
if ((cmdfd = open (cmdfil, O_RDONLY)) < 0) {
fprintf (stderr, "Command file open error: %s\n", strerror(errno));
return (-1);
}
fstat (cmdfd, &st);
if (st.st_size == 0) return (0);
buf = (char *) malloc (st.st_size + 1);
n = read (cmdfd, buf, st.st_size);
close (cmdfd);
*(buf+n) = '\0';
/* 1st pass: count number of args */
nargs = 0;
p = buf;
parm = 0;
while (c = *p++) {
if (c == ' ' || c == '\t' || c == '\n') {
parm = 0;
} else if (!parm) {
parm = 1;
nargs++;
}
}
if (nargs == 0) return (0);
argv = (char **) malloc ((nargs + 1) * sizeof(char *));
/* 2nd pass: build argv */
nargs = 0;
p = buf;
parm = 0;
while (c = *p++) {
if (c == ' ' || c == '\t' || c == '\n') {
if (parm) {
parm = 0;
*(p - 1) = '\0';
}
} else if (!parm) {
parm = 1;
argv[nargs++] = p - 1;
}
}
argv[nargs] = NULL;
*argvp = argv;
return (nargs);
}
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