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From: Jonas Genannt <jonas.genannt@capi2name.de>
Subject: setserial pcmcia.c patch
diff -Naurp setserial-2.17.orig/pcmcia.c setserial-2.17/pcmcia.c
--- setserial-2.17.orig/pcmcia.c 1970-01-01 00:00:00.000000000 +0000
+++ setserial-2.17/pcmcia.c 2008-09-26 21:59:26.000000000 +0000
@@ -0,0 +1,159 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+/* This file contains the modifications needed to check for pcmcia conflicts
+ * between a normal port and a pcmcia serial-based port. Setserial should never
+ * be permitted to control a pcmcia-based device... leave it to pcmcia-cs.
+ *
+ * Note that the checking is a bit of an overkill, in that I suspect that
+ * checking stab is probably enough. However, far too many bugs have been
+ * reported on this topic for me to cut corners, so all checks are in...
+ *
+ * - Gordon Russell <gor@debian.org>
+ */
+
+/* ...but I don't have a pcmcia system. I use some routines in a sub-directory
+ * in the build directory to allow me to do some testing...
+ */
+
+extern char *progname;
+
+#undef DEBUGPCMCIA
+/* #define DEBUGPCMCIA */
+
+#ifdef DEBUGPCMCIA
+#define STABFILE {"pcmcia/var_run_stab",NULL}
+#define CARDCTL "./pcmcia/cardctl"
+#else
+#define STABFILE {"/var/run/stab","/var/state/pcmcia/stab","/var/lib/pcmcia/stab",NULL}
+#define CARDCTL "/sbin/cardctl"
+#endif
+
+/*
+ * Just a check to make sure the device exists
+ */
+int safety_check(char *devname)
+{
+ if (access(devname,F_OK)) {
+ fprintf(stderr," %s: device is not found\n",devname);
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * check if the i/o address supplied for the port currently belongs to a
+ * pcmcia i/o window using cardctl
+ */
+int pcmcia_check_cardctl(char *devname,int devport)
+{
+int filedes[2],pid; /* [0] is reading, [1] writing */
+char *buffer;
+char *i;
+ssize_t sz;
+int w,f,t,status;
+int willreturn;
+ willreturn=1;
+ if (access(CARDCTL,F_OK)) return 1;
+ if (pipe(filedes)==0) {
+ switch(pid = fork()) {
+ case -1 : fprintf(stderr," setserial: unable to check cardctl (fork)\n");
+ return 1;
+ case 0 : /* child */
+ close(0); close(1); close(2);
+ close(filedes[0]);
+ dup2(filedes[1],1);
+ dup2(filedes[1],2);
+ execl(CARDCTL,CARDCTL,"config",NULL);
+ /* printf("unable to execute %s\n",CARDCTL); */
+ exit(127);
+ default : /* parent */
+ close(filedes[1]);
+ /* I need a buffer, but how big? Lets play safe... */
+ buffer = malloc(sizeof(char)*50000);
+ while ((sz = read(filedes[0],buffer,50000))) {
+ i = buffer;
+ while (i = strstr(i,"I/O window ")) {
+ if (sscanf(i,"I/O window %d: %x to %x,",&w,&f,&t)!=0) {
+ /* printf("%d 0x0%x 0x0%x\n",w,f,t); */
+ if ((devport>=f)&&(devport<=t)) {
+ fprintf(stderr," %s: port 0x0%x lies in pcmcia i/o window\n",devname,devport);
+ willreturn=0;
+ }
+ }
+ i++;
+ }
+ }
+ free(buffer);
+ close(filedes[0]);
+ }
+ if (waitpid(pid, &status, 0) == -1) {
+ if (status != 0) {
+ fprintf(stderr," setserial: strange response during cardctl command\n");
+ }
+ }
+ return willreturn;
+ } else {
+ fprintf(stderr," setserial: unable to check cardctl (pipe)\n");
+ return 1;
+ }
+}
+
+/*
+ * check that the device name specified is not being controlled by a
+ * pcmcia manager as specified in the stab file
+ */
+int pcmcia_check_stab(char *devname)
+{
+char *i,**s,buffer[1024],dev[128];
+int j;
+FILE *stab;
+char *stabs[] = STABFILE;
+
+ for (s = stabs; *s; s++) {
+ /* printf("Scanning %s\n",*s); */
+ if (!access(*s,F_OK))
+ if ((stab = fopen(*s,"r"))!=NULL) {
+ while (!feof(stab))
+ if(fgets(buffer,1023,stab)) {
+ i = strtok(buffer,"\t");
+ for (j=0; (j<4)&&i; j++) i = strtok(NULL,"\t");
+ if (i) {
+ strcpy(dev,"/dev/");
+ strcat(dev,i);
+ /* Not perfect, since devname may not I suppose begin with a /dev */
+ if (strcmp(dev,devname)==0) {
+ fprintf(stderr," %s: pcmcia controlled device (%s)\n",
+ devname,*s);
+ return 0;
+ }
+ }
+ }
+ fclose(stab);
+ }
+ }
+ return 1;
+}
+
+const char *pcmcia_check(char *devname, int devport)
+{
+int len;
+char *cname;
+ if (safety_check(devname)) {
+ if (pcmcia_check_stab(devname))
+ if (pcmcia_check_cardctl(devname,devport))
+ return "";
+ return " pcmcia";
+ }
+ return "";
+}
+
+/*
+main()
+{
+ pcmcia_check("/dev/ttyS0",0xa1f);
+}
+*/
|
