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Top Forums Shell Programming and Scripting Blog-Thread: Creating a Shell Wrapper and Runtime Modifier (SWARM) Post 303046071 by sea on Wednesday 22nd of April 2020 09:16:18 PM
Old 04-22-2020
Since preparing 'translatable' strings for functions is boring, I thought I'd implement some more functions from TUI.

What does one need, when one wants cross-platform-compatible scripts?
A way to reckognize and differ them of course!
Code:
	swarm.os.desktop() { #
	# Returns the name of the DE/WM or terminal application name
	# Assigned to: $DESKTOP
		$PRINTF '%s\n' "${XDG_CURRENT_DESKTOP:-${DESKTOP_SESSION:-${TERM:-TTY}}}"
	}
	swarm.os.distro() { #
	# Returns the name of the distro
	# Assigned to: $DISTRO
        	# This /etc is not as dynamic as I'd like
        	# but its THE absolute standard - as far as I'm aware
        	if [[ ! -f "/etc/os-release" ]] || ! $GREP -E  ^NAME= "/etc/os-release"  | $SED s,"NAME=","",g >&1 
		then	local e=/etc
			local SF="release version"    # Search For

			local results=$(for a in $SF;do \ls "$e"|"$GREP" "$a";done)
			local resultsFiles=$(for each in $results;do [[ -f "$e/$each" ]] && $PRINTF "$each ";done)

			for each in $resultsFiles
			do      strcat="$($GREP -i ^NAME= $e/$each)"
				[[ -n "$strcat" ]] && break
				strcat="$($GREP -i ^id= $e/$each)"
				[[ -n "$strcat" ]] && break
			done
			$PRINTF "${strcat/*=}"|$SED s,'\"','',g
		fi
	}
	swarm.os.based() { #
	# Returns arch, debian, redhat or unknown
	# Assigned to: $BASED
    		out=""
		if [[ -f /etc/redhat-release ]]
		then	out=redhat
		elif [[ -f /etc/arch-release ]]
		then	out=arch
		elif [[ -f /etc/debian_version ]]
		then	out=debian
		else	out=unknown
			# Do further checking
			# Changes according to: https://github.com/icy/pacapt/blob/ng/pacapt (153-180)
			swarm.util.which cave   1>/dev/null 2>/dev/null && out=exherbo
			swarm.util.which emerge 1>/dev/null 2>/dev/null && out=gentoo
			swarm.util.which port   1>/dev/null 2>/dev/null && out=mac
			swarm.util.which brew   1>/dev/null 2>/dev/null && out=mac
			swarm.util.which zypper 1>/dev/null 2>/dev/null && out=opensuse
			# Not sure if i handle these 2 properly
			swarm.util.which pkg 1>/dev/null 2>/dev/null && out=openbsd
			swarm.util.which pkgng 1>/dev/null 2>/dev/null && out=freebsd
		fi
		builtin echo "$out"
	}
	DISTRO="$(swarm.os.distro)"
	DESKTOP="$(swarm.os.desktop)"
	BASED="$(swarm.os.based)"

If you happen to have any recomended additions or changes, please, let me know so.
Have fun! Smilie

Last edited by sea; 04-23-2020 at 11:50 AM.. Reason: code fix for swarm.os.distro
 

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OPENPTY(3)						   BSD Library Functions Manual 						OPENPTY(3)

NAME
openpty, login_tty, forkpty -- tty utility functions SYNOPSIS
#include <util.h> int openpty(int *amaster, int *aslave, char *name, struct termios *termp, struct winsize *winp); int login_tty(int fd); pid_t forkpty(int *amaster, char *name, struct termios *termp, struct winsize *winp); DESCRIPTION
The openpty(), login_tty(), and forkpty() functions perform manipulations on ttys and pseudo-ttys. The openpty() function allocates a pseudo-tty and returns file descriptors for the master and slave in amaster and aslave. If name is non- null, the filename of the slave is returned in name. If termp is non-null, the terminal parameters of the slave will be set to the values in termp. If winp is non-null, the window size of the slave will be set to the values in winp. The login_tty() function prepares for a login on the tty fd (which may be a real tty device, or the slave of a pseudo-tty as returned by openpty()) by creating a new session, making fd the controlling terminal for the current process, setting fd to be the standard input, out- put, and error streams of the current process, and closing fd. The forkpty() function combines openpty(), fork(), and login_tty() to creates a new process operating in a pseudo-tty. The file descriptor of the master side of the pseudo-tty is returned in amaster, and the filename of the slave in name if it is non-null. The termp and winp parameters, if non-null, will determine the terminal attributes and window size of the slave side of the pseudo-tty. RETURN VALUES
If a call to openpty(), login_tty(), or forkpty() is not successful, -1 is returned and errno is set to indicate the error. Otherwise, openpty(), login_tty(), and the child process of forkpty() return 0, and the parent process of forkpty() returns the process ID of the child process. ERRORS
openpty() will fail if: [EAGAIN] There are no available pseudo-ttys. login_tty() will fail if ioctl() fails to set fd to the controlling terminal of the current process. forkpty() will fail if either openpty() or fork() fails. FILES
/dev/ptmx cloning pseudo-tty device /dev/ttys[0-9][0-9][0-9] slave pseudo-tty devices SEE ALSO
fork(2) BSD
April 5, 2008 BSD
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