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#define _RESEARCH_SOURCE
#define _LOCK_EXTENSION
#define _QLOCK_EXTENSION
#define _BSD_EXTENSION
#define _POSIX_EXTENSION
#define _POSIX_SOURCE
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <u.h>
#include <fmt.h>
#include <lock.h>
#include <qlock.h>
#include <draw.h>
/* PROTO */
int
getwidth(void)
{
int linewidth, charwidth, fd, num;
char buf[128], *fn;
Font *font;
if ((fn = getenv("font")) == NULL)
return -1;
if ((font = openfont(NULL, fn)) == NULL)
return -1;
if ((fd = open("/dev/window", O_RDONLY)) < 0) {
font = NULL;
return -1;
}
num = read(fd, buf, 60);
close(fd);
if (num < 60) {
font = NULL;
return -1;
}
buf[num] = 0;
linewidth = atoi(buf + 36) - atoi(buf + 12) - 25;
charwidth = stringwidth(font, "0");
return linewidth / charwidth;
}
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