getargs.c

一个基于linux的TCP/IP协议栈的实现

/* getargs.c
 * [e-mail]
 * 2006-11-05
 */

#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "net-support.h"
#include "pathnames.h"

int getargs(char *string, char *arguments[])
{
	int len = strlen(string); 
	char temp[len+1];
	char *sp, *ptr;
	int i, argc;
	char want;

	sp = string;
	i = 0;
	strcpy(temp, string);
	ptr = temp;

	while (*ptr != '\0' && i < 31) {
		while (*ptr == ' ' || *ptr == '\t')
			ptr++;
		arguments[i++] = sp;
		if( *ptr == '"' || *ptr == '\'' ){
			want = *ptr++;
			while( *ptr != '\0' ){
				if( *ptr == want && *(ptr - 1) != '\\' ){
					ptr++;
					break;
				}
				*sp++ = *ptr++;
			}
		}else{
			while( *ptr != '\0' && *ptr != ' ' && *ptr != '\t')
				*sp++ = *ptr++;
		}
		*sp++ = '\0';

		if( *ptr != '\0' ){
			while( *ptr == ' ' || *ptr == '\t' )
				ptr++;
		}
	}
	argc = i;
	while( i < 32 )
		arguments[i++] = (char *) NULL;
	return (argc);
}