Date: Mon, 8 May 2017 08:58:51 +0000 (UTC) From: Edward Tomasz Napierala <trasz@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r317934 - head/usr.bin/resizewin Message-ID: <201705080858.v488wpCF035057@repo.freebsd.org>
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Author: trasz Date: Mon May 8 08:58:51 2017 New Revision: 317934 URL: https://svnweb.freebsd.org/changeset/base/317934 Log: Add resizewin -z. It makes resizewin not do anything if the terminal size is already set to something other than zero. It's supposed to be called from eg /etc/profile - it's not neccessary to query terminal size when logging in over the network, because the protocol used already takes care of this, but it's neccessary when logging over a serial line. Reviewed by: cem, Daniel O'Connor <darius@dons.net.au> MFC after: 2 weeks Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D10637 Modified: head/usr.bin/resizewin/resizewin.1 head/usr.bin/resizewin/resizewin.c Modified: head/usr.bin/resizewin/resizewin.1 ============================================================================== --- head/usr.bin/resizewin/resizewin.1 Mon May 8 08:34:50 2017 (r317933) +++ head/usr.bin/resizewin/resizewin.1 Mon May 8 08:58:51 2017 (r317934) @@ -27,17 +27,27 @@ .\" .\" $FreeBSD$ .\" -.Dd July 9, 2016 +.Dd May 8, 2017 .Dt RESIZEWIN 1 .Os .Sh NAME .Nm resizewin .Nd update the kernel window size for the current TTY +.Sh SYNOPSIS +.Nm +.Op Fl z .Sh DESCRIPTION Query the terminal emulator window size with the .Dv TIOCSWINSZ ioctl and set the window size known by the kernel to the new values. The terminal is assumed to be VT100/ANSI compatible. +.Pp +The following options are available: +.Bl -tag -width ".Fl z" +.It Fl z +Do nothing unless the current kernel terminal size is zero. +.El +.Pp .Nm is functionally similar to .Xr resize 1 , Modified: head/usr.bin/resizewin/resizewin.c ============================================================================== --- head/usr.bin/resizewin/resizewin.c Mon May 8 08:34:50 2017 (r317933) +++ head/usr.bin/resizewin/resizewin.c Mon May 8 08:58:51 2017 (r317934) @@ -47,20 +47,50 @@ static const char query[] = "\033[999;999H" /* Move cursor */ "\033[6n" /* Get cursor position */ "\0338"; /* Restore cursor position */ + +static void +usage(void) +{ + + fprintf(stderr, "usage: resizewin [-z]\n"); + exit(1); +} + int -main(__unused int argc, __unused char **argv) +main(int argc, char **argv) { struct termios old, new; struct winsize w; - int ret, fd, cnt, error; + int ret, fd, ch, cnt, error, zflag; char data[20]; struct timeval then, now; error = 0; + zflag = 0; + while ((ch = getopt(argc, argv, "z")) != -1) { + switch (ch) { + case 'z': + zflag = 1; + break; + case '?': + default: + usage(); + } + } + argc -= optind; + if (argc != 0) + usage(); if ((fd = open("/dev/tty", O_RDWR | O_NONBLOCK)) == -1) exit(1); + if (zflag) { + if (ioctl(fd, TIOCGWINSZ, &w) == -1) + exit(1); + if (w.ws_row != 0 && w.ws_col != 0) + exit(0); + } + /* Disable echo */ if (tcgetattr(fd, &old) == -1) exit(1);
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