| /* |
| |
| * Copyright Daniel Industries. |
| * |
| * Created by: Vipin Malik (vipin.malik@daniel.com) |
| * |
| * This code is released under the GPL version 2. See the file COPYING |
| * for more details. |
| * |
| * Software distributed under the Licence is distributed on an "AS IS" |
| * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. |
| * See the Licence for the specific language governing rights and |
| * limitations under the Licence. |
| |
| This program opens files in progression (file00001, file00002 etc), |
| upto MAX_NUM_FILES and checks their CRC. If a file is not found or the |
| CRC does not match it stops it's operation. |
| |
| Everything is logged in a logfile called './logfile'. |
| |
| If everything is ok this program sends a signal, via com1, to the remote |
| power control box to power cycle this computer. |
| |
| This program then proceeds to create new files file0....file<MAX_NUM_FILES> |
| in a endless loop and checksum each before closing them. |
| |
| STRUCTURE OF THE FILES: |
| The fist int is the size of the file in bytes. |
| The last 2 bytes are the CRC for the entire file. |
| There is random data in between. |
| |
| The files are opened in the current dir. |
| |
| $Id: checkfs.c,v 1.8 2005/11/07 11:15:17 gleixner Exp $ |
| $Log: checkfs.c,v $ |
| Revision 1.8 2005/11/07 11:15:17 gleixner |
| [MTD / JFFS2] Clean up trailing white spaces |
| |
| Revision 1.7 2001/06/21 23:04:17 dwmw2 |
| Initial import to MTD CVS |
| |
| Revision 1.6 2001/06/08 22:26:05 vipin |
| Split the modbus comm part of the program (that sends the ok to pwr me down |
| message) into another file "comm.c" |
| |
| Revision 1.5 2001/06/08 21:29:56 vipin |
| fixed small issue with write() checking for < 0 instead of < (bytes to be written). |
| Now it does the latter (as it should). |
| |
| Revision 1.4 2001/05/11 22:29:40 vipin |
| Added a test to check and err out if the first int in file (which tells us |
| how many bytes there are in the file) is zero. This will prevent a corrupt |
| file with zero's in it from passing the crc test. |
| |
| Revision 1.3 2001/05/11 21:33:54 vipin |
| Changed to use write() rather than fwrite() when creating new file. Additionally, |
| and more important, it now does a single write() for the entire data. This will |
| enable us to use this program to test for power fail *data* reliability when |
| writing over an existing file, specially on powr fail "safe" file systems as |
| jffs/jffs2. Also added a new cmdline parameter "-e" that specifies the max # of |
| errors that can be tolerated. This should be set to ZERO to test for the above, |
| as old data should be reliabily maintained if the newer write never "took" before |
| power failed. If the write did succeed, then the newer data will have its own |
| CRC in place when it gets checked => hence no error. In theory at least! |
| |
| |
| Revision 1.2 2001/05/11 19:27:33 vipin |
| Added cmd line args to change serial port, and specify max size of |
| random files created. Some cleanup. Added -Wall to Makefile. |
| |
| Revision 1.1 2001/05/11 16:06:28 vipin |
| Importing checkfs (the power fail test program) into CVS. This was |
| originally done for NEWS. NEWS had a lot of version, this is |
| based off the last one done for NEWS. The "makefiles" program |
| is run once initially to create the files in the current dir. |
| "checkfs" is then run on every powerup to check consistancy |
| of the files. See checkfs.c for more details. |
| |
| |
| */ |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <termios.h> |
| #include <unistd.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include <string.h> |
| #include <time.h> |
| #include "common.h" |
| |
| |
| |
| extern int do_pwr_dn(int fd, int cycleCnt); |
| |
| #define CMDLINE_PORT "-p" |
| #define CMDLINE_MAXFILEBYTES "-s" |
| #define CMDLINE_MAXERROR "-e" |
| #define CMDLINE_HELPSHORT "-?" |
| #define CMDLINE_HELPLONG "--help" |
| |
| |
| int CycleCount; |
| |
| char SerialDevice[255] = "/dev/ttyS0"; /* default, can be changed |
| through cmd line. */ |
| |
| #define MAX_INTS_ALLOW 100000 /* max # of int's in the file written. |
| Statis limit to size struct. */ |
| float FileSizeMax = 1024.0; /*= (file size in bytes), MUST be float*/ |
| |
| int MaxErrAllowed = 1; /* default, can ge changed thru cmd line*/ |
| |
| |
| /* Needed for CRC generation/checking */ |
| static const unsigned short crc_ccitt_table[] = { |
| 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, |
| 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, |
| 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, |
| 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, |
| 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, |
| 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, |
| 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, |
| 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, |
| 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, |
| 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, |
| 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, |
| 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, |
| 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, |
| 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, |
| 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, |
| 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, |
| 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, |
| 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, |
| 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, |
| 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, |
| 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, |
| 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, |
| 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, |
| 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, |
| 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, |
| 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, |
| 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, |
| 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, |
| 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, |
| 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, |
| 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, |
| 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 |
| }; |
| |
| |
| /* |
| Set's up the Linux serial port. Must be passed string to device to |
| open. Parameters are fixed to 9600,e,1 |
| |
| [A possible enhancement to this program would be to pass these |
| parameters via the command line.] |
| |
| Returns file descriptor to open port. Use this fd to write to port |
| and close it later, when done. |
| */ |
| int setupSerial (const char *dev) { |
| int i, fd; |
| struct termios tios; |
| |
| fd = open(dev,O_RDWR | O_NDELAY ); |
| if (fd < 0) { |
| fprintf(stderr, "%s: %s\n", dev, sys_errlist[errno]); |
| exit(1); |
| } |
| if (tcgetattr(fd, &tios) < 0) { |
| fprintf(stderr,"Could not get terminal attributes: %s",sys_errlist[errno]); |
| exit(1); |
| } |
| |
| tios.c_cflag = |
| CS7 | |
| CREAD | // Enable Receiver |
| HUPCL | // Hangup after close |
| CLOCAL | // Ignore modem control lines |
| PARENB; // Enable parity (even by default) |
| |
| |
| |
| tios.c_iflag = IGNBRK; // Ignore break |
| tios.c_oflag = 0; |
| tios.c_lflag = 0; |
| for(i = 0; i < NCCS; i++) { |
| tios.c_cc[i] = '\0'; // no special characters |
| } |
| tios.c_cc[VMIN] = 1; |
| tios.c_cc[VTIME] = 0; |
| |
| cfsetospeed (&tios, B9600); |
| cfsetispeed (&tios, B9600); |
| |
| if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) { |
| fprintf(stderr,"Could not set attributes: ,%s",sys_errlist[errno]); |
| exit(1); |
| } |
| return fd; |
| } |
| |
| |
| |
| |
| |
| //A portion of this code was taken from the AX.25 HDLC packet driver |
| //in LINUX. Once I test and have a better understanding of what |
| //it is doing, it will be better commented. |
| |
| //For now one can speculate that the CRC routine always expects the |
| //CRC to calculate out to 0xf0b8 (the hardcoded value at the end) |
| //and returns TRUE if it is and FALSE if it doesn't. |
| //Why don't people document better!!!! |
| int check_crc_ccitt(char *filename) |
| { |
| FILE *fp; |
| FILE *logfp; |
| unsigned short crc = 0xffff; |
| int len; |
| char dataByte; |
| int retry; |
| char done; |
| |
| fp = fopen(filename,"rb"); |
| if(!fp){ |
| logfp = fopen("logfile","a"); /*open for appending only.*/ |
| fprintf(logfp, "Verify checksum:Error! Cannot open filename passed for verify checksum: %s\n",filename); |
| fclose(logfp); |
| return FALSE; |
| } |
| |
| |
| /*the first int contains an int that is the length of the file in long.*/ |
| if(fread(&len, sizeof(int), 1, fp) != 1){ |
| logfp = fopen("logfile","a"); /*open for appending only.*/ |
| fprintf(logfp, "verify checksum:Error reading from file: %s\n", filename); |
| fclose(fp); |
| fclose(logfp); |
| return FALSE; |
| } |
| |
| /* printf("Checking %i bytes for CRC in \"%s\".\n", len, filename); */ |
| |
| /* Make sure that we did not read 0 as the number of bytes in file. This |
| check prevents a corrupt file with zero's in it from passing the |
| CRC test. A good file will always have some data in it. */ |
| if(len == 0) |
| { |
| |
| logfp = fopen("logfile","a"); /*open for appending only.*/ |
| fprintf(logfp, "verify checksum: first int claims there are 0 data in file. Error!: %s\n", filename); |
| fclose(fp); |
| fclose(logfp); |
| return FALSE; |
| } |
| |
| |
| rewind(fp); |
| len+=2; /*the file has two extra bytes at the end, it's checksum. Those |
| two MUST also be included in the checksum calculation. |
| */ |
| |
| for (;len>0;len--){ |
| retry=5; /*retry 5 times*/ |
| done = FALSE; |
| while(!done){ |
| if(fread(&dataByte, sizeof(char), 1, fp) != 1){ |
| retry--; |
| }else{ |
| done = TRUE; |
| } |
| if(retry == 0){ |
| done = TRUE; |
| } |
| } |
| if(!retry){ |
| logfp = fopen("logfile","a"); /*open for appending only.*/ |
| fprintf(logfp, "Unexpected end of file: %s\n", filename); |
| fprintf(logfp, "...bytes left to be read %i.\n",len); |
| fclose(logfp); |
| fclose(fp); |
| return FALSE; |
| } |
| crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ dataByte) & 0xff]; |
| } |
| fclose(fp); |
| if( (crc & 0xffff) != 0xf0b8){ |
| /*printf("The CRC of read file:%x\n", crc); */ |
| return FALSE; |
| } |
| return TRUE; |
| }/*end check_crc_ccitt() */ |
| |
| |
| |
| /* |
| Sends "OK to power me down" message to the remote |
| power cycling box, via the serial port. |
| Also updates the num power cycle count in a local |
| file. |
| This file "./cycleCnt" must be present. This is |
| initially (and once) created by the separate "makefiles.c" |
| program. |
| */ |
| void send_pwrdn_ok(void){ |
| |
| int fd; |
| FILE *cyclefp; |
| int cycle_fd; |
| |
| cyclefp = fopen("cycleCnt","rb"); |
| if(!cyclefp){ |
| printf("expecting file \"cycleCnt\". Cannot continue.\n"); |
| exit(1); |
| } |
| if(fread(&CycleCount, sizeof(CycleCount),1,cyclefp) != 1){ |
| fprintf(stderr, "Error! Unexpected end of file cycleCnt.\n"); |
| exit(1); |
| } |
| fclose(cyclefp); |
| |
| CycleCount++; |
| |
| /*now write this puppy back*/ |
| cyclefp = fopen("cycleCnt","wb"); |
| cycle_fd = fileno(cyclefp); |
| if(!cyclefp){ |
| fprintf(stderr, "Error! cannot open file for write:\"cycleCnt\". Cannot continue.\n"); |
| exit(1); |
| } |
| if(fwrite(&CycleCount, sizeof(CycleCount), 1,cyclefp) !=1){ |
| fprintf(stderr, "Error writing to file cycleCnt. Cannot continue.\n"); |
| exit(1); |
| } |
| if(fdatasync(cycle_fd)){ |
| fprintf(stderr, "Error! cannot sync file buffer with disk.\n"); |
| exit(1); |
| } |
| |
| fclose(cyclefp); |
| (void)sync(); |
| |
| printf("\n\n Sending Power down command to the remote box.\n"); |
| fd = setupSerial(SerialDevice); |
| |
| if(do_pwr_dn(fd, CycleCount) < 0) |
| { |
| fprintf(stderr, "Error sending power down command.\n"); |
| exit(1); |
| } |
| |
| close(fd); |
| }//end send_pwrnd_ok() |
| |
| |
| |
| |
| /* |
| Appends 16bit CRC at the end of numBytes long buffer. |
| Make sure buf, extends at least 2 bytes beyond. |
| */ |
| void appendChecksum(char *buf, int numBytes){ |
| |
| unsigned short crc = 0xffff; |
| int index = 0; |
| |
| /* printf("Added CRC (2 bytes) to %i bytes.\n", numBytes); */ |
| |
| for (; numBytes > 0; numBytes--){ |
| |
| crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ buf[index++]) & 0xff]; |
| } |
| crc ^= 0xffff; |
| /*printf("The CRC: %x\n\n", crc);*/ |
| |
| buf[index++] = crc; |
| buf[index++] = crc >> 8; |
| |
| |
| |
| }/*end checksum()*/ |
| |
| |
| |
| |
| |
| /* |
| This guy make a new "random data file" with the filename |
| passed to it. This file is checksummed with the checksum |
| stored at the end. The first "int" in the file is the |
| number of int's in it (this is needed to know how much |
| data to read and checksum later). |
| */ |
| void make_new_file(char *filename){ |
| |
| |
| int dfd; /* data file descriptor */ |
| int rand_data; |
| int data_size; |
| int temp_size; |
| int dataIndex = 0; |
| int err; |
| |
| |
| struct { |
| int sizeInBytes; /* must be int */ |
| int dataInt[MAX_INTS_ALLOW+1]; /* how many int's can we write? */ |
| }__attribute((packed)) dataBuf; |
| |
| |
| fprintf(stderr, "Creating File:%s. ", filename); |
| |
| if((dfd = open(filename, O_RDWR | O_CREAT | O_SYNC)) <= 0) |
| { |
| printf("Error! Cannot open file: %s\n",filename); |
| perror("Error"); |
| exit(1); |
| } |
| |
| /*now write a bunch of random binary data to the file*/ |
| /*first figure out how much data to write. That is random also.*/ |
| |
| /*file should not be less than 5 ints long. (so that we have decent length files, |
| that's all)*/ |
| while( |
| ((data_size = (int)(1+(int)((FileSizeMax/sizeof(int))*rand()/(RAND_MAX+1.0)))) < 5) |
| ); |
| |
| /* printf("Writing %i ints to the file.\n", data_size); */ |
| |
| temp_size = data_size * sizeof(int); |
| |
| /* Make sure that all data is written in one go! This is important to |
| check for reliability of file systems like JFFS/JFFS that purport to |
| have "reliable" writes during powre fail. |
| */ |
| |
| dataBuf.sizeInBytes = temp_size; |
| |
| data_size--; /*one alrady written*/ |
| dataIndex = 0; |
| |
| while(data_size--){ |
| rand_data = (int)(1 + (int)(10000.0*rand()/(RAND_MAX+1.0))); |
| |
| dataBuf.dataInt[dataIndex++] = rand_data; |
| |
| } |
| |
| /*now calculate the file checksum and append it to the end*/ |
| appendChecksum((char *)&dataBuf, dataBuf.sizeInBytes); |
| |
| /* Don't forget to increase the size of data written by the 2 chars of CRC at end. |
| These 2 bytes are NOT included in the sizeInBytes field. */ |
| if((err = write(dfd, (void *)&dataBuf, dataBuf.sizeInBytes + sizeof(short))) < |
| (dataBuf.sizeInBytes + sizeof(short)) |
| ) |
| { |
| printf("Error writing data buffer to file. Written %i bytes rather than %i bytes.", |
| err, dataBuf.sizeInBytes); |
| perror("Error"); |
| exit(1); |
| } |
| |
| /* Now that the data is (hopefully) safely written. I can truncate the file to the new |
| length so that I can reclaim any unused space, if the older file was larger. |
| */ |
| if(ftruncate(dfd, dataBuf.sizeInBytes + sizeof(short)) < 0) |
| { |
| perror("Error: Unable to truncate file."); |
| exit(1); |
| } |
| |
| |
| close(dfd); |
| |
| |
| }//end make_new_file() |
| |
| |
| |
| /* |
| Show's help on stdout |
| */ |
| void printHelp(char **argv) |
| { |
| printf("Usage:%s <options, defined below>\n", argv[0]); |
| printf("%s </dev/ttyS0,1,2...>: Set com port to send ok to pwr dn msg on\n", |
| CMDLINE_PORT); |
| printf("%s <n>: Set Max size in bytes of each file to be created.\n", |
| CMDLINE_MAXFILEBYTES); |
| printf("%s <n>: Set Max errors allowed when checking all files for CRC on start.\n", |
| CMDLINE_MAXERROR); |
| printf("%s or %s: This Help screen.\n", CMDLINE_HELPSHORT, |
| CMDLINE_HELPLONG); |
| |
| }/* end printHelp()*/ |
| |
| |
| |
| void processCmdLine(int argc, char **argv) |
| { |
| |
| int cnt; |
| |
| /* skip past name of this program, process rest */ |
| for(cnt = 1; cnt < argc; cnt++) |
| { |
| if(strcmp(argv[cnt], CMDLINE_PORT) == 0) |
| { |
| strncpy(SerialDevice, argv[++cnt], sizeof(SerialDevice)); |
| continue; |
| }else |
| if(strcmp(argv[cnt], CMDLINE_MAXFILEBYTES) == 0) |
| { |
| FileSizeMax = (float)atoi(argv[++cnt]); |
| if(FileSizeMax > (MAX_INTS_ALLOW*sizeof(int))) |
| { |
| printf("Max file size allowd is %i.\n", |
| MAX_INTS_ALLOW*sizeof(int)); |
| exit(0); |
| } |
| |
| continue; |
| }else |
| if(strcmp(argv[cnt], CMDLINE_HELPSHORT) == 0) |
| { |
| printHelp(argv); |
| exit(0); |
| |
| }else |
| if(strcmp(argv[cnt], CMDLINE_HELPLONG) == 0) |
| { |
| printHelp(argv); |
| exit(0); |
| }else |
| |
| if(strcmp(argv[cnt], CMDLINE_MAXERROR) == 0) |
| { |
| MaxErrAllowed = atoi(argv[++cnt]); |
| } |
| else |
| { |
| printf("Unknown cmd line option:%s\n", argv[cnt]); |
| printHelp(argv); |
| exit(0); |
| |
| } |
| } |
| |
| |
| }/* end processCmdLine() */ |
| |
| |
| |
| |
| |
| int main(int argc, char **argv){ |
| |
| FILE *logfp; |
| int log_fd; |
| char filename[30]; |
| short filenameCounter = 0; |
| unsigned short counter; |
| unsigned short numberFiles; |
| char error = FALSE; |
| short errorCnt = 0; |
| time_t timep; |
| char * time_string; |
| unsigned int seed; |
| |
| |
| numberFiles = MAX_NUM_FILES; |
| |
| if(argc >= 1) |
| { |
| processCmdLine(argc, argv); |
| } |
| |
| |
| /* |
| First open MAX_NUM_FILES and make sure that the checksum is ok. |
| Also make an intry into the logfile. |
| */ |
| /* timestamp! */ |
| time(&timep); |
| time_string = (char *)ctime((time_t *)&timep); |
| |
| /*start a new check, make a log entry and continue*/ |
| logfp = fopen("logfile","a"); /*open for appending only.*/ |
| log_fd = fileno(logfp); |
| fprintf(logfp,"%s", time_string); |
| fprintf(logfp,"Starting new check.\n"); |
| if(fdatasync(log_fd) == -1){ |
| fprintf(stderr,"Error! Cannot sync file data with disk.\n"); |
| exit(1); |
| } |
| |
| fclose(logfp); |
| (void)sync(); |
| |
| /* |
| Now check all random data files in this dir. |
| */ |
| for(counter=0;counter<MAX_NUM_FILES;counter++){ |
| |
| fprintf(stderr, "%i.", counter); |
| |
| /*create the filename in sequence. The number of files |
| to check and the algorithm to create the filename is |
| fixed and known in advance.*/ |
| sprintf(filename,"file%i",filenameCounter++); |
| |
| if(!check_crc_ccitt(filename)){ |
| /*oops, checksum does not match. Make an entry into the log file |
| and decide if we can continue or not.*/ |
| fprintf(stderr, "crcError:%s ", filename); |
| logfp = fopen("logfile","a"); /*open for appending only.*/ |
| log_fd = fileno(logfp); |
| fprintf(logfp,"CRC error in file: %s\n", filename); |
| if(fdatasync(log_fd) == -1){ |
| fprintf(stderr,"Error! Cannot sync file data with disk.\n"); |
| exit(1); |
| } |
| fclose(logfp); |
| (void)sync(); |
| |
| error = TRUE; |
| errorCnt++; |
| |
| if(errorCnt > MaxErrAllowed){ |
| logfp = fopen("logfile","a"); /*open for appending only.*/ |
| log_fd = fileno(logfp); |
| fprintf(logfp,"\nMax Error count exceed. Stopping!\n"); |
| if(fdatasync(log_fd) == -1){ |
| fprintf(stderr,"Error! Cannot sync file data with disk.\n"); |
| exit(1); |
| } |
| fclose(logfp); |
| (void)sync(); |
| |
| fprintf(stderr, "Too many errors. See \"logfile\".\n"); |
| exit(1); |
| }/* if too many errors */ |
| |
| /*we have decided to continue, however first repair this file |
| so that we do not cumulate errors across power cycles.*/ |
| make_new_file(filename); |
| } |
| }//for |
| |
| /*all files checked, make a log entry and continue*/ |
| logfp = fopen("logfile","a"); /*open for appending only.*/ |
| log_fd = fileno(logfp); |
| fprintf(logfp,"All files checked. Total errors found: %i\n\n", errorCnt); |
| if(fdatasync(log_fd)){ |
| fprintf(stderr, "Error! cannot sync file buffer with disk.\n"); |
| exit(1); |
| } |
| |
| fclose(logfp); |
| (void)sync(); |
| |
| /*now send a message to the remote power box and have it start a random |
| pwer down timer after which power will be killed to this unit. |
| */ |
| send_pwrdn_ok(); |
| |
| /*now go into a forever loop of writing to files and CRC'ing them on |
| a continious basis.*/ |
| |
| /*start from a random file #*/ |
| /*seed rand based on the current time*/ |
| seed = (unsigned int)time(NULL); |
| srand(seed); |
| |
| filenameCounter=(int)(1+(int)((float)(MAX_NUM_FILES-1)*rand()/(RAND_MAX+1.0))); |
| |
| while(1){ |
| |
| for(;filenameCounter<MAX_NUM_FILES;filenameCounter++){ |
| |
| /*create the filename in sequence*/ |
| sprintf(filename,"file%i",filenameCounter); |
| make_new_file(filename); |
| } |
| filenameCounter = 0; |
| } |
| |
| exit(0); /* though we will never reach here, but keeps the compiler happy*/ |
| }/*end main()*/ |
