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f3.c
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f3.c
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#include "main.h"
/**
* _getpath - Find the full path of a command
* @cmd: Command name for which to find the full path
* Return: The full path of the command if found, or NULL if not found
*/
char *_getpath(char *cmd)
{
char *epath, *ccmd, *dr;
int i;
struct stat sts;
for (i = 0; cmd[i]; i++)
{
if (cmd[i] == '/')
{
if (stat(cmd, &sts) == 0)
return (_dup(cmd));
return (NULL);
}
}
epath = _getenv("PATH");
if (!epath)
return (NULL);
dr = strtok(epath, ":");
while (dr)
{
ccmd = malloc(_len(dr) + _len(cmd) + 2);
if (ccmd)
{
_cpy(ccmd, dr);
_cat(ccmd, "/");
_cat(ccmd, cmd);
if (stat(ccmd, &sts) == 0)
{
free(epath);
return (ccmd);
}
free(ccmd), ccmd = NULL;
dr = strtok(NULL, ":");
}
}
free(epath);
return (NULL);
}
/**
* _getenv - Get the value of an environment variable
* @var: Name of the environment variable
* Return: The value of the environment variable if found, or NULL
*/
char *_getenv(char *var)
{
char *tmp, *key, *val, *env;
int i;
for (i = 0; environ[i]; i++)
{
tmp = _dup(environ[i]);
key = strtok(tmp, "=");
if (_cmp(key, var) == 0)
{
val = strtok(NULL, "\n");
env = _dup(val);
free(tmp);
return (env);
}
free(tmp), tmp = NULL;
}
return (NULL);
}
/**
* _rline - Read a line of input from the standard input
* Return: A dynamically allocated string containing the read line or NULL
*/
char *_rline(void)
{
char *l = NULL;
size_t len = 0;
ssize_t n;
if (isatty(STDIN_FILENO))
write(STDOUT_FILENO, "$ ", 2);
n = getline(&l, &len, stdin);
if (n == -1)
{
free(l);
return (NULL);
}
return (l);
}