getcwd+chdir.c

#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
int main(void){
        char cwd[PATH_MAX];
        if(!getcwd(cwd,sizeof(cwd))) {
                fprintf(stderr,"Errorgetcwd(): %s",strerror(errno));
                exit(EXIT_FAILURE);
        }
        printf("cwd=%s\n",cwd);
        char new_dir[PATH_MAX];
        snprintf(new_dir,sizeof(new_dir),"/tmp/");
        if(chdir(new_dir)==-1){
                fprintf(stderr,"Can'tchdirto'%s':%s\n",
                                new_dir,strerror(errno));
                exit(1);
        }
        return 0;
}