I loads the following code into kerenel as a module. The system hangs. I
dont know what's wrong. I guess the segmentation fault exists and array of
characters cause memory crash. Anyone has an idea? Thanks
Here is the code of the program
//RCFCOMM
static char RFCOMM[]="/usr/csm/log/rfcomm.log";
static char RFCOMM_sys[]="/usr/csm/log/rfcomm/sys.log";
static char RFCOMM_err[]="/usr/csm/log/rfcomm/err.log";
static char RFCOMM_ctrl[]="/usr/csm/log/rfcomm/ctrl.log";
static char RFCOMM_rec[]="/usr/csm/log/rfcomm/rec.log";
static char RFCOMM_warn[]="/usr/csm/log/rfcomm/warn.log";
static char RFCOMM_snd[]="/usr/csm/log/rfcomm/snd.log";
//SDP
static char SDP[]="/usr/csm/log/sdp.log";
static char SDP_sys[]="/usr/csm/log/sdp/sys.log";
static char SDP_err[]="/usr/csm/log/sdp/err.log";
static char SDP_ctrl[]="/usr/csm/log/sdp/ctrl.log";
static char SDP_rec[]="/usr/csm/log/sdp/rec.log";
static char SDP_warn[]="/usr/csm/log/sdp/warn.log";
static char SDP_snd[]="/usr/csm/log/sdp/snd.log";
//L2CAP
static char L2CAP[]="/usr/csm/log/l2cap.log";
static char L2CAP_sys[]="/usr/csm/log/l2cap/sys.log";
static char L2CAP_err[]="/usr/csm/log/l2cap/err.log";
static char L2CAP_ctrl[]="/usr/csm/log/l2cap/ctrl.log";
static char L2CAP_rec[]="/usr/csm/log/l2cap/rec.log";
static char L2CAP_warn[]="/usr/csm/log/l2cap/warn.log";
static char L2CAP_snd[]="/usr/csm/log/l2cap/snd.log";
//LMP
static char LMP[]="/usr/csm/log/lmp.log";
static char LMP_sys[]="/usr/csm/log/lmp/sys.log";
static char LMP_err[]="/usr/csm/log/lmp/err.log";
static char LMP_ctrl[]="/usr/csm/log/lmp/ctrl.log";
static char LMP_rec[]="/usr/csm/log/lmp/rec.log";
static char LMP_warn[]="/usr/csm/log/lmp/warn.log";
static char LMP_snd[]="/usr/csm/log/lmp/snd.log";
//MISC
static char MISC[]="/usr/csm/log/misc.log";
static char MISC_sys[]="/usr/csm/log/misc/sys.log";
static char MISC_err[]="/usr/csm/log/misc/err.log";
static char MISC_ctrl[]="/usr/csm/log/misc/ctrl.log";
static char MISC_rec[]="/usr/csm/log/misc/rec.log";
static char MISC_warn[]="/usr/csm/log/misc/warn.log";
static char MISC_snd[]="/usr/csm/log/misc/snd.log";
void _csm_evtlogger(char *evtno, const char *rem) {
int retval,orgfsuid,orgfsgid,fd,fd2,fd3,temp;
mm_segment_t orgfs;
static u8 buffer[5];
static u8 buf[2];
static u8* src = "/usr/csm/errtab.txt";
int i = 0;
//int k = 0;
static u8 globall[30]; // global log
static u8 subl[30]; // sub log
// make the time stamp for event log
unsigned int year=0,mon=0, day=0, hour=0, min=0, sec=0;
static u8 cyear[4];
static u8 cmon[2];
static u8 cday[2];
static u8 chour[2];
static u8 cmin[2];
static u8 csec[2];
if ((rem == NULL) || (evtno == NULL)) {
printk("1 CSM Error: Null remark");
return;
}
if (evtno[0] == '1') {
sprintf(globall,"%s", RFCOMM);
if (evtno[1] == '1') {
sprintf(subl, "%s", RFCOMM_sys);
}
else if (evtno[1] == '2') {
sprintf(subl, "%s", RFCOMM_err);
}
else if (evtno[1] == '3') {
sprintf(subl, "%s", RFCOMM_ctrl);
}
else if (evtno[1] == '4') {
sprintf(subl, "%s", RFCOMM_rec);
}
else if (evtno[1] == '5') {
sprintf(subl, "%s", RFCOMM_warn);
}
else if (evtno[1] == '6') {
sprintf(subl, "%s", RFCOMM_snd);
}
}
else if (evtno[0] == '2') {
sprintf(globall, "%s", SDP);
if (evtno[1] == '1') {
sprintf(subl, "%s", SDP_sys);
}
else if (evtno[1] == '2') {
sprintf(subl, "%s", SDP_err);
}
else if (evtno[1] == '3') {
sprintf(subl, "%s", SDP_ctrl);
}
else if (evtno[1] == '4') {
sprintf(subl, "%s", SDP_rec);
}
else if (evtno[1] == '5') {
sprintf(subl, "%s", SDP_warn);
}
else if (evtno[1] == '6') {
sprintf(subl, "%s", SDP_snd);
}
}
else if (evtno[0] == '3') {
sprintf(globall, "%s", L2CAP);
if (evtno[1] == '1') {
sprintf(subl, "%s", L2CAP_sys);
}
else if (evtno[1] == '2') {
sprintf(subl, "%s", L2CAP_err);
}
else if (evtno[1] == '3') {
sprintf(subl, "%s", L2CAP_ctrl);
}
else if (evtno[1] == '4') {
sprintf(subl, "%s", L2CAP_rec);
}
else if (evtno[1] == '5') {
sprintf(subl, "%s", L2CAP_warn);
}
else if (evtno[1] == '6') {
sprintf(subl, "%s", L2CAP_snd);
}
}
else if (evtno[0] == '4') {
sprintf(globall, "%s", LMP);
if (evtno[1] == '1') {
sprintf(subl, "%s", LMP_sys);
}
else if (evtno[1] == '2') {
sprintf(subl, "%s", LMP_err);
}
else if (evtno[1] == '3') {
sprintf(subl, "%s", LMP_ctrl);
}
else if (evtno[1] == '4') {
sprintf(subl, "%s", LMP_rec);
}
else if (evtno[1] == '5') {
sprintf(subl, "%s", LMP_warn);
}
else if (evtno[1] == '6') {
sprintf(subl, "%s", LMP_snd);
}
}
else if (evtno[0] == '5') {
sprintf(globall, "%s", MISC);
if (evtno[1] == '1') {
sprintf(subl, "%s", MISC_sys);
}
else if (evtno[1] == '2') {
sprintf(subl, "%s", MISC_err);
}
else if (evtno[1] == '3') {
sprintf(subl, "%s", MISC_ctrl);
}
else if (evtno[1] == '4') {
sprintf(subl, "%s", MISC_rec);
}
else if (evtno[1] == '5') {
sprintf(subl, "%s", MISC_warn);
}
else if (evtno[1] == '6') {
sprintf(subl, "%s", MISC_snd);
}
}
// get date & time from CMOS
sec = CMOS_READ(RTC_SECONDS);
min = CMOS_READ(RTC_MINUTES);
hour = CMOS_READ(RTC_HOURS);
day = CMOS_READ(RTC_DAY_OF_MONTH);
mon = CMOS_READ(RTC_MONTH);
year = CMOS_READ(RTC_YEAR);
// change to human-readable format
BCD_TO_BIN(sec);
BCD_TO_BIN(min);
BCD_TO_BIN(hour);
BCD_TO_BIN(day);
BCD_TO_BIN(mon);
BCD_TO_BIN(year);
// as for year 2003, return 3. So check if there is a need to re-format
if ((year += 1900) < 1970)
year += 100;
sprintf(cyear,"%d",year);
// manipulate date & time variables into the forms of character
if (mon < 10)
sprintf(cmon,"0%d",mon);
else
sprintf(cmon,"%d",mon);
if (day < 10)
sprintf(cday,"0%d",day);
else
sprintf(cday,"%d",day);
if (hour < 10)
sprintf(chour,"0%d",hour);
else
sprintf(chour,"%d",hour);
if (min < 10)
sprintf(cmin,"0%d",min);
else
sprintf(cmin,"%d",min);
if (sec < 10)
sprintf(csec,"0%d",sec);
else
sprintf(csec,"%d",sec);
//sprintf(datetime, "%s/%s/%d %s:%s:%s ",cmon,cday,year,chour,cmin,csec);
// Save uid and gid used for filesystem access.
// Set user and group to 0 (root)
orgfsuid=current->fsuid;
orgfsgid=current->fsgid;
current->fsuid=current->fsgid=0;
// save FS register and set FS register to kernel
// space, needed for read and write to accept
// buffer in kernel space.
orgfs=get_fs();
set_fs(KERNEL_DS);
if ((buffer != NULL) && (buf != NULL)) {
if (((fd = sys_open(src, O_RDONLY, 0)) > 0) && ((fd2 =
sys_open(globall,O_WRONLY|O_CREAT|O_APPEND, 0644)) > 0) && ((fd3 =
sys_open(subl,O_WRONLY|O_CREAT|O_APPEND, 0644)) > 0)){
do {
retval = sys_read(fd, buffer, 5);
/*if (buffer != NULL)
printk("2 Evtno : %s\n", buffer);
else {
printk("2 Read NULL at evtno (file)\n");
return;
}*/
if (retval < 0)
printk("Read error %d\n",-retval);
if (retval > 0) {
if (strncmp(buffer,evtno,5) == 0) {
// get the comment from the error table (errtab.txt)
retval = sys_write(fd2, cmon, 2);
retval = sys_write(fd2, "/", 1);
retval = sys_write(fd2, cday, 2);
retval = sys_write(fd2, "/", 1);
retval = sys_write(fd2, cyear, 4);
retval = sys_write(fd2, " ", 1);
retval = sys_write(fd2, chour, 2);
retval = sys_write(fd2, ":", 1);
retval = sys_write(fd2, cmin, 2);
retval = sys_write(fd2, ":", 1);
retval = sys_write(fd2, csec, 2);
retval = sys_write(fd2, " ", 1);
retval = sys_write(fd3, cmon, 2);
retval = sys_write(fd3, "/", 1);
retval = sys_write(fd3, cday, 2);
retval = sys_write(fd3, "/", 1);
retval = sys_write(fd3, cyear, 4);
retval = sys_write(fd3, " ", 1);
retval = sys_write(fd3, chour, 2);
retval = sys_write(fd3, ":", 1);
retval = sys_write(fd3, cmin, 2);
retval = sys_write(fd3, ":", 1);
retval = sys_write(fd3, csec, 2);
retval = sys_write(fd3, " ", 1);
i = 0;
do {
retval = sys_read(fd, buf, 2);
//printk("%c",buffer[0]);
if ((buf[0] != '\n') && (buf[1] != '\n')) {
//printk("%s",buf);
if ((retval = sys_write(fd2, buf,2)) < 0)
printk("Write error!");
if ((retval = sys_write(fd3, buf,2)) < 0)
printk("Write error!");
}
else if (buf[0] != '\n') {
//printk("%c",buf[0]);
if ((retval = sys_write(fd2, buf,1)) < 0)
printk("Write error!");
if ((retval = sys_write(fd3, buf,1)) < 0)
printk("Write error!");
}
} while ((buf[0] != '\n') && (buf[1] != '\n'));
if ((retval = sys_write(fd2, " ",1)) < 0)
printk("Write error!");
if ((retval = sys_write(fd2, rem,_sizeof(rem))) < 0)
printk("Write error!");
if ((retval = sys_write(fd2, "\n",1)) < 0)
printk("Write error!");
if ((retval = sys_write(fd3, " ",1)) < 0)
printk("Write error!");
if ((retval = sys_write(fd3, rem,_sizeof(rem))) < 0)
printk("Write error!");
if ((retval = sys_write(fd3, "\n",1)) < 0)
printk("Write error!");
retval = -1; // stop reading file
}
else {
do {
retval = sys_read(fd, buf, 1);
} while (buf[0] != '\n');
}
}
} while (retval > 0);
//printk("Buffer : %s\n",buffer);
temp = sys_close(fd);
temp = sys_close(fd2);
temp = sys_close(fd3);
}
else
printk("fd <= 0\n");
}
else {
printk("Null Pointer for Buffer\n");
return;
}
set_fs(orgfs);
current->fsuid=orgfsuid;
current->fsgid=orgfsgid;
}
Best Regards,
George Chang
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