int main(void)
{
int res,ret;
char cmd[MAXCMD];
struct cmdlist cmds;
struct rlimit r;
r.rlim_cur = 50;
r.rlim_max = 10000;
setrlimit(RLIMIT_FSIZE,&r);
/* setting up the initial values of the structure */
/* this should be done every time when new object is created */
setupnewcommand(&cmds);
/* Setting up file size limit for this process and for the child processes */
/* main loop of the shell */
/* this loop proceses command wirtten by user in the following steps: */
/* 1. Displaying command prompt
2. Reading command from the std input
3. Parsing this command
4. Executing parsed commands
5. Dealocating used memory
*/
while(1){
printprompt();
if(readcmd(cmd, MAXCMD) == RESERROR) continue;
res = parsecmd(cmd, MAXCMD, &cmds);
printparsedcmds(&cmds);
ret = executecmds(&cmds);
dealocate(&cmds);
}
return 0;
}
/* --- execute a shell command --- */
int executeshellcmd(Shellcmd *shellcmd)
{
printshellcmd(shellcmd);
Cmd *cmds;
char **cmd0;
cmds = shellcmd->the_cmds;
cmd0 = cmds->cmd;
if(strcmp(*cmd0,"exit") == 0)
{
return 1;
}
int i = executecmds(cmds, shellcmd->rd_stdin, shellcmd->rd_stdout, shellcmd->background);
if(i == -1)
{
printf("Command not found\n");
}
return 0;
}
int main(int argc,char *argv[])
{
int i,j,len,p1=0,p2=0,flag=0;
char *filename = argv[1];
FILE *fp;
fp = fopen(filename,"r");
fscanf(fp,"%d",&len);
char **A,**B;
A = (char **)malloc(len*sizeof(char *));
B = (char **)malloc(len*sizeof(char *));
for(i=0;i<len;i++)
{
A[i] = (char *)malloc(80*sizeof(char));
B[i] = (char *)malloc(80*sizeof(char));
}
char command[50],depend[50],env[50],option[50],fullcom[80],tmp[50];
for(i=0;i<len;i++)
{
flag = 0;
fscanf(fp,"%s",command);
fscanf(fp,"%s",depend);
fscanf(fp,"%s",env);
fscanf(fp,"\t%[^\n]s",option);
if(strcmp(option,"-") == 0)
{
strcpy(option,"");
}
int dep = strcmp(depend,"-");
strcpy(fullcom,command);
strcat(fullcom,"\t");
strcat(fullcom,env);
strcat(fullcom,"\t");
strcat(fullcom,option);
if( dep == 0)
{
if(p1<=p2)
{
strcpy(A[p1],fullcom);
p1++;
}
else
{
strcpy(B[p2], fullcom);
p2++;
}
}
else
{
for(j=0;j<p1;j++)
{
sscanf(A[j],"%s",tmp);
if( strcmp(tmp,depend) == 0 )
{
flag = 1;
strcpy(A[p1],fullcom);
p1++;
break;
}
}
if(!flag)
{
strcpy(B[p2],fullcom);
p2++;
}
}
}
fclose(fp);
executecmds(A,B,p1,p2);
return 0;
}
