diff options
Diffstat (limited to 'com32/modules/poweroff.c')
-rw-r--r-- | com32/modules/poweroff.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/com32/modules/poweroff.c b/com32/modules/poweroff.c new file mode 100644 index 0000000..41e501e --- /dev/null +++ b/com32/modules/poweroff.c @@ -0,0 +1,91 @@ +/* ----------------------------------------------------------------------- * + * + * Copyright 2013 Sebastian Herbszt - All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, + * Boston MA 02110-1301, USA; either version 2 of the License, or + * (at your option) any later version; incorporated herein by reference. + * + * ----------------------------------------------------------------------- */ + +/* + * poweroff.c + * + * APM poweroff module + */ + +#include <stdio.h> +#include <string.h> +#include <com32.h> + +int main(int argc __unused, char *argv[] __unused) +{ + com32sys_t inregs, outregs; + + memset(&inregs, 0, sizeof inregs); + + inregs.eax.l = 0x5300; /* APM Installation Check (00h) */ + inregs.ebx.l = 0; /* APM BIOS (0000h) */ + __intcall(0x15, &inregs, &outregs); + + if (outregs.eflags.l & EFLAGS_CF) { + printf("APM not present.\n"); + return 1; + } + + if ((outregs.ebx.l & 0xffff) != 0x504d) { /* signature 'PM' */ + printf("APM not present.\n"); + return 1; + } + + if ((outregs.eax.l & 0xffff) < 0x101) { /* Need version 1.1+ */ + printf("APM 1.1+ not supported.\n"); + return 1; + } + + if ((outregs.ecx.l & 0x8) == 0x8) { /* bit 3 APM BIOS Power Management disabled */ + printf("Power management disabled.\n"); + return 1; + } + + memset(&inregs, 0, sizeof inregs); + inregs.eax.l = 0x5301; /* APM Real Mode Interface Connect (01h) */ + inregs.ebx.l = 0; /* APM BIOS (0000h) */ + __intcall(0x15, &inregs, &outregs); + + if (outregs.eflags.l & EFLAGS_CF) { + printf("APM RM interface connect failed.\n"); + return 1; + } + + memset(&inregs, 0, sizeof inregs); + inregs.eax.l = 0x530e; /* APM Driver Version (0Eh) */ + inregs.ebx.l = 0; /* APM BIOS (0000h) */ + inregs.ecx.l = 0x101; /* APM Driver version 1.1 */ + __intcall(0x15, &inregs, &outregs); + + if (outregs.eflags.l & EFLAGS_CF) { + printf("APM 1.1+ not supported.\n"); + return 1; + } + + if ((outregs.ecx.l & 0xffff) < 0x101) { /* APM Connection version */ + printf("APM 1.1+ not supported.\n"); + return 1; + } + + memset(&inregs, 0, sizeof inregs); + inregs.eax.l = 0x5307; /* Set Power State (07h) */ + inregs.ebx.l = 1; /* All devices power managed by the APM BIOS */ + inregs.ecx.l = 3; /* Power state off */ + __intcall(0x15, &inregs, &outregs); + + if (outregs.eflags.l & EFLAGS_CF) { + printf("Power off failed.\n"); + return 1; + } + + return 0; +} |