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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/param.h>
#define DEBUG 0
int main(int argc,char *argv[]) {
int i,j,k,l;
char *s=argv[1];
char *out=malloc(MAXPATHLEN+1);
switch(s[0]) {
case '/':
strcpy(out,"/");
break;
case '~':
strcpy(out,(char *)getenv("HOME"));
break;
default:
getcwd(out,MAXPATHLEN);
strcat(out,"/");
}
strcat(out,s);
#if DEBUG
printf("%s\n",out);
#endif
l=strlen(out)-1;
if(out[l] == '.' && out[l-1] == '/') strcat(out,"/");
if(out[l] == '.' && out[l-1] == '.' && out[l-2] == '/') strcat(out,"/");
for(i=0;out[i];) {
#if DEBUG
printf("%s @ %s\n",out,out+i);
#endif
if(strlen(out+i) >= 4) {
if(out[i] == '/' && out[i+1] == '.' && out[i+2] == '.' && out[i+3] == '/') {
for(j=i-1;j>0 && out[j] != '/';j--) {
}
if(j<0) j=0;
for(k=j;out[k];k++) {
out[k]=out[k+(i-j)+3];
if(!out[k]) break;
}
i=0;
continue;
}
}
if(strlen(out+i) >= 3) {
if(out[i] == '/' && out[i+1] == '.' && out[i+2] == '/') {
for(j=i;out[j];j++) {
out[j]=out[j+2];
if(!out[j]) break;
}
i=0;
continue;
}
}
if(strlen(out+i) >= 2) {
if(out[i] == '/' && out[i+1] == '/') {
//leftshift over it.
for(j=i;out[j];j++) {
out[j]=out[j+1];
if(!out[j]) break;
}
i=0;
continue;
}
}
i++;
}
printf("%s\n",out);
return 0;
}
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