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authormarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
committermarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
commit3562e78743202e43aec8727005182a2558117eca (patch)
tree8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /xorg-server/hw/xfree86/os-support/linux/lnx_kmod.c
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Checked in the following released items:
xkeyboard-config-1.4.tar.gz ttf-bitstream-vera-1.10.tar.gz font-alias-1.0.1.tar.gz font-sun-misc-1.0.0.tar.gz font-sun-misc-1.0.0.tar.gz font-sony-misc-1.0.0.tar.gz font-schumacher-misc-1.0.0.tar.gz font-mutt-misc-1.0.0.tar.gz font-misc-misc-1.0.0.tar.gz font-misc-meltho-1.0.0.tar.gz font-micro-misc-1.0.0.tar.gz font-jis-misc-1.0.0.tar.gz font-isas-misc-1.0.0.tar.gz font-dec-misc-1.0.0.tar.gz font-daewoo-misc-1.0.0.tar.gz font-cursor-misc-1.0.0.tar.gz font-arabic-misc-1.0.0.tar.gz font-winitzki-cyrillic-1.0.0.tar.gz font-misc-cyrillic-1.0.0.tar.gz font-cronyx-cyrillic-1.0.0.tar.gz font-screen-cyrillic-1.0.1.tar.gz font-xfree86-type1-1.0.1.tar.gz font-adobe-utopia-type1-1.0.1.tar.gz font-ibm-type1-1.0.0.tar.gz font-bitstream-type1-1.0.0.tar.gz font-bitstream-speedo-1.0.0.tar.gz font-bh-ttf-1.0.0.tar.gz font-bh-type1-1.0.0.tar.gz font-bitstream-100dpi-1.0.0.tar.gz font-bh-lucidatypewriter-100dpi-1.0.0.tar.gz font-bh-100dpi-1.0.0.tar.gz font-adobe-utopia-100dpi-1.0.1.tar.gz font-adobe-100dpi-1.0.0.tar.gz font-util-1.0.1.tar.gz font-bitstream-75dpi-1.0.0.tar.gz font-bh-lucidatypewriter-75dpi-1.0.0.tar.gz font-adobe-utopia-75dpi-1.0.1.tar.gz font-bh-75dpi-1.0.0.tar.gz bdftopcf-1.0.1.tar.gz font-adobe-75dpi-1.0.0.tar.gz mkfontscale-1.0.6.tar.gz openssl-0.9.8k.tar.gz bigreqsproto-1.0.2.tar.gz xtrans-1.2.2.tar.gz resourceproto-1.0.2.tar.gz inputproto-1.4.4.tar.gz compositeproto-0.4.tar.gz damageproto-1.1.0.tar.gz zlib-1.2.3.tar.gz xkbcomp-1.0.5.tar.gz freetype-2.3.9.tar.gz pthreads-w32-2-8-0-release.tar.gz pixman-0.12.0.tar.gz kbproto-1.0.3.tar.gz evieext-1.0.2.tar.gz fixesproto-4.0.tar.gz recordproto-1.13.2.tar.gz randrproto-1.2.2.tar.gz scrnsaverproto-1.1.0.tar.gz renderproto-0.9.3.tar.gz xcmiscproto-1.1.2.tar.gz fontsproto-2.0.2.tar.gz xextproto-7.0.3.tar.gz xproto-7.0.14.tar.gz libXdmcp-1.0.2.tar.gz libxkbfile-1.0.5.tar.gz libfontenc-1.0.4.tar.gz libXfont-1.3.4.tar.gz libX11-1.1.5.tar.gz libXau-1.0.4.tar.gz libxcb-1.1.tar.gz xorg-server-1.5.3.tar.gz
Diffstat (limited to 'xorg-server/hw/xfree86/os-support/linux/lnx_kmod.c')
-rw-r--r--xorg-server/hw/xfree86/os-support/linux/lnx_kmod.c112
1 files changed, 112 insertions, 0 deletions
diff --git a/xorg-server/hw/xfree86/os-support/linux/lnx_kmod.c b/xorg-server/hw/xfree86/os-support/linux/lnx_kmod.c
new file mode 100644
index 000000000..4e6f2d25d
--- /dev/null
+++ b/xorg-server/hw/xfree86/os-support/linux/lnx_kmod.c
@@ -0,0 +1,112 @@
+
+#ifdef HAVE_XORG_CONFIG_H
+#include <xorg-config.h>
+#endif
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/wait.h>
+#include <signal.h>
+#include "xf86_OSlib.h"
+#include "xf86.h"
+
+
+#define MODPROBE_PATH_FILE "/proc/sys/kernel/modprobe"
+#define MAX_PATH 1024
+
+
+#if 0
+/* XFree86 #defines execl to be the xf86execl() function which does
+ * a fork AND exec. We don't want that. We want the regular,
+ * standard execl().
+ */
+#ifdef execl
+#undef execl
+#endif
+#endif
+
+
+/*
+ * Load a Linux kernel module.
+ * This is used by the DRI/DRM to load a DRM kernel module when
+ * the X server starts. It could be used for other purposes in the future.
+ * Input:
+ * modName - name of the kernel module (Ex: "tdfx")
+ * Return:
+ * 0 for failure, 1 for success
+ */
+_X_EXPORT int
+xf86LoadKernelModule(const char *modName)
+{
+ char mpPath[MAX_PATH] = "";
+ int fd = -1, status, n;
+ pid_t pid;
+
+ /* get the path to the modprobe program */
+ fd = open(MODPROBE_PATH_FILE, O_RDONLY);
+ if (fd >= 0) {
+ int count = read(fd, mpPath, MAX_PATH - 1);
+ if (count <= 0) {
+ mpPath[0] = 0;
+ }
+ else if (mpPath[count - 1] == '\n') {
+ mpPath[count - 1] = 0; /* replaces \n with \0 */
+ }
+ close(fd);
+ /* if this worked, mpPath will be "/sbin/modprobe" or similar. */
+ }
+
+ if (mpPath[0] == 0) {
+ /* we failed to get the path from the system, use a default */
+ strcpy(mpPath, "/sbin/modprobe");
+ }
+
+ /* now fork/exec the modprobe command */
+ /*
+ * It would be good to capture stdout/stderr so that it can be directed
+ * to the log file. modprobe errors currently are missing from the log
+ * file.
+ */
+ switch (pid = fork()) {
+ case 0: /* child */
+ /* change real/effective user ID to 0/0 as we need to
+ * preinstall agpgart module for some DRM modules
+ */
+ if (setreuid(0,0)) {
+ xf86Msg(X_WARNING,"LoadKernelModule: "
+ "Setting of real/effective user Id to 0/0 failed");
+ }
+ setenv("PATH","/sbin",1);
+ n = execl(mpPath, "modprobe", modName, NULL);
+ xf86Msg(X_WARNING,"LoadKernelModule %s\n",strerror(errno));
+ exit(EXIT_FAILURE); /* if we get here the child's exec failed */
+ break;
+ case -1: /* fork failed */
+ return 0;
+ default: /* fork worked */
+ {
+ /* XXX we loop over waitpid() because it sometimes fails on
+ * the first attempt. Don't know why!
+ */
+ int count = 0, p;
+ do {
+ p = waitpid(pid, &status, 0);
+ } while (p == -1 && count++ < 4);
+
+ if (p == -1) {
+ return 0;
+ }
+
+ if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
+ return 1; /* success! */
+ }
+ else {
+ return 0;
+ }
+ }
+ }
+
+ /* never get here */
+ return 0;
+}