111 lines
2.9 KiB
Diff
111 lines
2.9 KiB
Diff
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Status: not-sent
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# This supposedly does not need to be sent upstream as there's fbutils,
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# although its development has stagnated.
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---
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con2fbmap.1 | 29 ++++++++++++++++++++++++++
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con2fbmap.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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2 files changed, 95 insertions(+)
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--- /dev/null
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+++ b/con2fbmap.1
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@@ -0,0 +1,29 @@
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+.TH con2fbmap 1 2006-01-18 2.1 "Linux frame buffer utils"
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+.SH NAME
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+con2fbmap \- shows and sets mapping between consoles and framebuffer devices.
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+.SH SYNOPSIS
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+.B con2fbmap
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+.RI console
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+.RI [ framebuffer ]
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+.SH DESCRIPTION
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+.B This documentation is not finished
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+.PP
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+.B con2fbmap
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+is a system utility to show or change the mapping of the consoles to the
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+frame buffer device. The frame buffer device provides a simple and unique
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+interface to access different kinds of graphic displays.
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+.PP
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+Frame buffer devices are accessed via special device nodes located in the
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+/dev directory. The naming scheme for these nodes is always
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+.IR \fBfb < n >,
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+where
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+.I n
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+is the number of the used frame buffer device.
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+.PP
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+.SH OPTIONS
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+The first option must be there, and identify the console on which to work.
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+If the second option is not set, con2fbmap shows the current mapping of
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+identified console. If the second argument is given (as a number) con2fbmap
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+maps the identified console to said framebuffer device.
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+.TP
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+Sven LUTHER <luther@debian.org>
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--- /dev/null
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+++ b/con2fbmap.c
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@@ -0,0 +1,66 @@
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+#include <stdio.h>
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+#include <stdlib.h>
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+#include <unistd.h>
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+#include <fcntl.h>
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+#include <errno.h>
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+#include <string.h>
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+#include <sys/ioctl.h>
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+#include <sys/types.h>
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+#include <sys/stat.h>
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+#include <linux/fb.h>
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+
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+#define DEFAULT_FRAMEBUFFER "/dev/fb0"
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+#define DEFAULT_FRAMEBUFFER_DEVFS "/dev/fb/0"
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+
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+const char *programname;
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+
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+void Usage(void)
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+{
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+ fprintf(stderr, "\nUsage: %s console [framebuffer]\n\n", programname);
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+ exit(1);
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+}
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+
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+int main(int argc, char *argv[])
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+{
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+ int do_write = 0;
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+ char *fbpath; /* any frame buffer will do */
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+ int fd;
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+ struct fb_con2fbmap map;
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+
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+ programname = argv[0];
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+ switch (argc) {
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+ case 3:
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+ do_write = 1;
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+ map.framebuffer = atoi(argv[2]);
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+ case 2:
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+ map.console = atoi(argv[1]);
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+ break;
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+ default:
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+ Usage();
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+ }
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+
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+ if (access("/dev/.devfsd", F_OK) == 0) /* devfs detected */
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+ fbpath = DEFAULT_FRAMEBUFFER_DEVFS;
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+ else
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+ fbpath = DEFAULT_FRAMEBUFFER;
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+
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+ if ((fd = open(fbpath, O_RDONLY)) == -1) {
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+ fprintf(stderr, "open %s: %s\n", fbpath, strerror(errno));
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+ exit(1);
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+ }
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+ if (do_write) {
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+ if (ioctl(fd, FBIOPUT_CON2FBMAP, &map)) {
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+ fprintf(stderr, "ioctl FBIOPUT_CON2FBMAP: %s\n", strerror(errno));
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+ exit(1);
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+ }
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+ } else {
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+ if (ioctl(fd, FBIOGET_CON2FBMAP, &map)) {
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+ fprintf(stderr, "ioctl FBIOGET_CON2FBMAP: %s\n", strerror(errno));
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+ exit(1);
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+ }
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+ printf("console %d is mapped to framebuffer %d\n", map.console,
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+ map.framebuffer);
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+ }
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+ close(fd);
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+ exit(0);
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+}
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