[dev] [PATCH] Check for presence of SHELL environment variable

[Eric Pruitt]

- POSIX states the SHELL environment variable "... shall represent a
  pathname of the user's preferred command language interpreter." As
  such, st should check for its presence when deciding what shell to
  use; just as HOME can be defined to override one's passwd-defined home
  directory, a user should also be able to override their passwd-defined
  shell using the SHELL environment variable.
---
 st.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)


diff --git a/st.c b/st.c
index 23dd7f1..cec0d07 100644
--- a/st.c
+++ b/st.c
@@ -1158,7 +1158,10 @@ execsh(void) {
 			die("who are you?\n");
 	}
 
-	sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
+	if (!(sh = getenv("SHELL"))) {
+		sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
+	}
+	
 	if(opt_cmd)
 		prog = opt_cmd[0];
 	else if(utmp)