www.pudn.com > SimpleShell.zip > myshell.c

 
#include  
#include "myshell.h" 
 
#define MAX_COM 100 
#define MAX_ARG 256 
 
main(int commingArgc, char *commingArgv[]) { 
	 
	char command[MAX_COM];			 
	char commandForCheck[MAX_COM];	 
	char bCommand[MAX_COM];			 
	int i;							 
	int outSignIndex;				 
	int inSignIndex;				 
	int pIndex;						 
	char *bToken;					 
	char *bArg[MAX_ARG];		 
	int bArgv;						 
	char source[MAX_COM];			 
	char desti[MAX_COM];			 
	char dDesti[MAX_COM];			 
	int cError;					 
 
	char curDic[MAX];				 
	int background;					 
	 
	 
	char *pwdForCh;					 
 
	 
	FILE *fp;					 
 
	 
	getcwd(curDic, MAX);							 
 
 
	pwdForCh = (char *)malloc( 6 + strlen(curDic) + 2);	 
 
	strcat(pwdForCh, "SHELL=");							 
	strcat(pwdForCh, curDic);							 
	putenv(pwdForCh);							 
	while(1) { 
 
		 
		cError = FALSE;		 
		outSignIndex = -1;	 
		inSignIndex = -1;	 
		pIndex = -1;		 
		for(i=0; i ", curDic); 
			 
			fgets(command, MAX_COM, stdin);   
			 
			strcpy(commandForCheck, command);			 
			 
			 
			for(i = 0; i < MAX_COM; i++) {												 
				if(commandForCheck[i] == '>') { 
					outSignIndex = i; 
					break; 
				} 
			}		 
			 
			 
			for(i = 0; i < MAX_COM; i++) {								 
				if(commandForCheck[i] == '<') { 
					inSignIndex = i; 
					break; 
				} 
			} 
 
			 
			if( outSignIndex == -1 && inSignIndex == -1) {				 
				excuteCommand(command, desti, dDesti, source); 
				continue; 
			} 
			 
			 
			else if ( outSignIndex > inSignIndex && (inSignIndex>=0) ) { 
				pIndex = inSignIndex; 
			}			 
			else if ( inSignIndex > outSignIndex && (outSignIndex>=0) ) { 
				pIndex = outSignIndex; 
			} 
			else if ( inSignIndex < 0 ) { 
				pIndex = outSignIndex; 
			} 
			else if ( outSignIndex < 0 ) { 
				pIndex = inSignIndex; 
			}			 
 
			 
			for(i=pIndex; i") ) {	 
 
						if ( desti[0] == (char)NULL && dDesti[0] == (char)NULL) { 
							strcpy(desti, bArg[++i]); 
						} 
						else { 
							cError = TRUE; 
							break; 
						} 
						 
					} 
 
					 
					else if( !strcmp(bArg[i],">>") ) {	 
						if ((dDesti[0] == (char)NULL) && (desti[0] == (char)NULL)) { 
							strcpy(dDesti, bArg[++i]); 
						} 
						else { 
							cError = TRUE; 
							break; 
						}						 
					} 
 
					 
					else if( !strcmp(bArg[i],"<") ) {  
						if(source[0] == (char)NULL) { 
							strcpy(source, bArg[++i]); 
						} 
						else { 
							cError = TRUE; 
							break; 
						}						 
					} 
				}			 
			} 
			 
			 
			if( !strcmp(source, ">") | !strcmp(source, ">>") | !strcmp(source, "<") ) { 
				cError = TRUE; 
			} 
			else if ( !strcmp(desti, ">") | !strcmp(desti, ">>") | !strcmp(desti, "<") ) { 
				cError = TRUE; 
			} 
			else if ( !strcmp(desti, ">") | !strcmp(desti, ">>") | !strcmp(desti, "<") ) { 
				cError = TRUE; 
			} 
 
			 
			if(cError) { 
				printf(FIND_ERROR_MSG); 
				continue; 
			} 
			 
			 
			else {			 
				excuteCommand(command,desti,dDesti, source); 
			} 
		} 
			 
	} 
}