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get_path.c
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get_path.c
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#include "shell.h"
/**
* find_path - finds path
* @filename: file name
* @tmp: saves the PATH string
* @er: an error message
* Return: Success - path/filename, failure - er
*/
char *find_path(char *filename, char *tmp, char *er)
{
DIR *dir;
struct dirent *sd;
char *file_path, *path, *ret;
int len = 0;
while (filename[len])
len++;
path = _getenv("PATH");
tmp = save_path(tmp, path);
file_path = strtok(tmp, ":");
while (file_path){
dir = opendir(file_path);
if (!dir){
printf("Error! Unable to open directory.\n");
exit(0);
}
}
while ((sd = readdir(dir))){
ret = read_dir(er, sd, filename, len, file_path, tmp);
if (ret != er){
closedir(dir);
if (!(access(ret, X_OK)))
return (ret);
}
}
closedir(dir);
file_path = strtok(NULL, ":");
}
path = NULL;
free(tmp);
return (er);
}
/**
*read_dir - opens and reads directory file names in search of fil
*@er: error message
*@s: struct containing info about a files in a directory
*@fil: name of file being searched for
*@fp: directory being searched through
*@t: string containing the PATH variable's value
*@l: length of filename
*Return: success - path of fil/fil, else er
*/
char *read_dir(char *er, struct dirent *s, char *fil, int l, char *fp, char *t)
{
int i = 0;
char *ret;
for (i = 0; s->d_name[i] && fil[i]; i++){
if (s->d_name[i] != fil[i])
break;
if (i == (l - 1) && !(s->d_name[i + 1]))
{
ret = strcat(fp, "/");
ret = strcat(ret, fil);
free(t);
return (ret);
}
}
return (er);
}
/**
*save_path - saves a copy of the PATH string
*@tmp: copy to be made of PATH
*@path: string containing original PATH value
*
*Return: success - tmp first time, path every other time, else error
*/
char *save_path(char *tmp, char *path)
{
int i = 0;
if (!tmp){
tmp = malloc(sizeof(char) * 100);
while (path[i]){
tmp[i] = path[i];
i++;
tmp[i] = '\0';
}
i = 0;
return (tmp);
}
else
{
while (tmp[i])
{
path[i] = tmp[i];
i++;
path[i] = '\0';
}
i = 0;
return (path);
}
return ("error");
}