findbin.c

findbin.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

char* findbin(char* s);

char* findbin(char* s)
{
    char* p = getenv("PATH");
    char* a = "/";
    char* t = strtok(p, ":");
    while(t != NULL){
        char* e;
        e = malloc(strlen(t) + strlen(a) + strlen(s) + 1);
        sprintf(e, "%s%s%s", t, a, s);
        if(access(e, X_OK) != -1){
            return(e);
        }
        free(e);
        t = strtok(NULL, ":");
    }
    return(NULL);
}