On Wed, Jun 11, 2014 at 04:28:08PM +0200, Stefano Zacchiroli wrote:
> However, implementing the above in ledger would require either
> launching tput an external command (which is not particularly nice) or
> linking to ncurses.
Or not :)
Plain old ioctl can actually query terminal width without requiring any
additional library --- example attached.
I think it would be a much more useful default for --columns than
getenv(COLUMNS), as the latter is almost always gonna be empty.
HTH,
Cheers.
--
Stefano Zacchiroli . . . . . . . [email protected] . . . . o . . . o . o
Maître de conférences . . . . . http://upsilon.cc/zack . . . o . . . o o
Former Debian Project Leader . . @zack on identi.ca . . o o o . . . o .
« the first rule of tautology club is the first rule of tautology club »
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#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <unistd.h>
int main(void) {
struct winsize ws;
if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) {
perror("can't query terminal size");
exit(EXIT_FAILURE);
}
printf("columns=%d\n", ws.ws_col);
exit(EXIT_SUCCESS);
}
