Re: [PATCH] Do not rely on hardcoded path to systemd-ask-password.

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On Tue, 30 Jul 2013 10:00:26 +0200
Michał Górny <mgorny@xxxxxxxxxx> wrote:

> Relying on hardcoded /bin/systemd-ask-password path breaks systemd that
> install systemd-ask-password in /usr/bin. Since both paths are supposed
> to be in ${PATH} and popen() passes the command to shell, just pass
> 'systemd-ask-password' and let the shell find it.
> 
> Fixes: https://bugzilla.samba.org/show_bug.cgi?id=10054
> Signed-off-by: Michał Górny <mgorny@xxxxxxxxxx>
> ---
>  mount.cifs.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/mount.cifs.c b/mount.cifs.c
> index e76beee..7206dcb 100644
> --- a/mount.cifs.c
> +++ b/mount.cifs.c
> @@ -1626,7 +1626,7 @@ drop_child_privs(void)
>  }
>  
>  /*
> - * If systemd is running and /bin/systemd-ask-password --
> + * If systemd is running and systemd-ask-password --
>   * is available, then use that else fallback on getpass(..)
>   *
>   * Returns: @input or NULL on error
> @@ -1649,7 +1649,7 @@ get_password(const char *prompt, char *input, int capacity)
>  		FILE *ask_pass_fp = NULL;
>  
>  		cmd = ret = NULL;
> -		if (asprintf(&cmd, "/bin/systemd-ask-password \"%s\"", prompt) >= 0) {
> +		if (asprintf(&cmd, "systemd-ask-password \"%s\"", prompt) >= 0) {
>  			ask_pass_fp = popen (cmd, "re");
>  			free (cmd);
>  		}

Looks good, thanks. Will apply in a few days assuming no one objects.
I'll probably also throw in a comment mentioning that this relies on the
binary being in $PATH.

It might also be nice to consider adding an autoconf switch to set
this, but I think that relying on $PATH is probably reasonable in most
cases.

-- 
Jeff Layton <jlayton@xxxxxxxxx>
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