SET_ENVIRONMENT(4)

✨ Set_Environment (special file) ✨

bestie, welcome to the Set_Environment special file page — the one that sets a tool's environment and honestly slays.

🎀 NAME 🎀

Set_Environment — set a tool's environment. That's the whole assignment: this request is how a tool's environment gets updated.

🌸 SYNOPSIS 🌸

The call shape is literally:

       Set_Environment(in string variable,
               in string value
               [...]);

🦋 DESCRIPTION 🦋

The Set_Environment request replaces the value of the environment variable(s) you indicate. No extra ceremony, just a swap.

• variable — the name of the environment variable to set. That's the key, bestie.
• value — the value of the environment variable. If this argument is unset (in other words, it has the value (char *)0), then the variable should be removed from the environment. And if the variable didn't exist in the first place? Not an error. It's giving "cleanup is clean."

🫶 APPLICATION USAGE 🫶

The ttdt_session_join(3) function can be used to register for, and transparently process, the Set_Environment request. So if you want the app-side bestie to handle this for you, that's the function.

💅 EXAMPLES 💅

The Set_Environment request can be sent as in the following example:

       Tt_message msg = tttk_message_create(0, TT_REQUEST, TT_SESSION,
                               the_recipient_procid, TTDT_SET_ENVIRONMENT,
                               my_callback);
       tt_message_arg_add(msg, TT_IN, Tttk_string, "PATH");
       tt_message_arg_add(msg, TT_IN, Tttk_string, "/bin:/usr/ucb");
       tt_message_send(msg);

⚠️ WARNINGS ⚠️

Set_Environment can also be sent as a multicast notice, as an edict to all tools in the scope of the message. The consequences of doing so can be severe and unexpected. So like… don't casually blast the whole scope unless you are ready for chaos, no cap.

🔥 SEE ALSO 🔥

• tt_message_arg_add(3)
• tt_message_send(3)
• ttdt_session_join(3)
• Get_Environment request. Yes, the other environment request — she's referenced here too.

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That's the page, periodt 💖 The footer just repeats Set_Environment(special file) — no separate source/version/date line is included — so consider this your cute sign-off, bestie. 🦋💜