File less-429-shell.patch of Package less.34274

Index: less-643/filename.c
===================================================================
--- less-643.orig/filename.c
+++ less-643/filename.c
@@ -550,7 +550,7 @@ static FILE * shellcmd(char *cmd)
 #if HAVE_SHELL
 	char *shell;
 
-	shell = lgetenv("SHELL");
+	shell = lgetenv("LESSSHELL");
 	if (!isnullenv(shell))
 	{
 		char *scmd;
Index: less-643/less.hlp
===================================================================
--- less-643.orig/less.hlp
+++ less-643/less.hlp
@@ -104,7 +104,7 @@
   ___<_n_a_m_e_>             Display the setting of an option, by name.
   +_c_m_d                 Execute the less cmd each time a new file is examined.
 
-  !_c_o_m_m_a_n_d             Execute the shell command with $SHELL.
+  !_c_o_m_m_a_n_d             Execute the shell command with $LESSSHELL.
   #_c_o_m_m_a_n_d             Execute the shell command, expanded like a prompt.
   |XX_c_o_m_m_a_n_d            Pipe file between current pos & mark XX to shell command.
   s _f_i_l_e               Save input to a file.
Index: less-643/less.nro
===================================================================
--- less-643.orig/less.nro
+++ less-643/less.nro
@@ -459,7 +459,7 @@ current file.
 A pound sign (#) is replaced by the name of the previously examined file.
 "!!" repeats the last shell command.
 "!" with no shell command simply invokes a shell.
-On Unix systems, the shell is taken from the environment variable SHELL,
+On Unix systems, the shell is taken from the environment variable LESSSHELL,
 or defaults to "sh".
 On MS-DOS and OS/2 systems, the shell is the normal command processor.
 .IP "# shell-command"
@@ -2281,7 +2281,7 @@ automatically when running in
 .IP PATH
 User's search path (used to find a lesskey file
 on MS-DOS and OS/2 systems).
-.IP SHELL
+.IP LESSSHELL
 The shell used to execute the !\& command, as well as to expand filenames.
 .IP TERM
 The type of terminal on which
Index: less-643/lsystem.c
===================================================================
--- less-643.orig/lsystem.c
+++ less-643/lsystem.c
@@ -121,13 +121,13 @@ public void lsystem(char *cmd, char *don
 
 	/*
 	 * Pass the command to the system to be executed.
-	 * If we have a SHELL environment variable, use
+	 * If we have a LESSSHELL environment variable, use
 	 * <$SHELL -c "command"> instead of just <command>.
 	 * If the command is empty, just invoke a shell.
 	 */
 #if HAVE_SHELL
 	p = NULL;
-	if ((shell = lgetenv("SHELL")) != NULL && *shell != '\0')
+	if ((shell = lgetenv("LESSSHELL")) != NULL && *shell != '\0')
 	{
 		if (*cmd == '\0')
 			p = save(shell);