Hi Friends,
I have written a small code in C which performs the below operations
Task : 1 ) read line by line from a file.
2 ) assuming 3th and 4th fields of the file as GN and GNTO
3 ) The target file should contain all the fields except GNTO.
4 ) The target file should populate records starting from GN and GNTO
i.e., if GN is 1 and GNTO is 4 of the same line
then
anything,anything,1,anything,anything
anything,anything,2,anything,anything
anything,anything,3,anything,anything
anything,anything,4,anything,anything
so i have used a for loop like below.
for ( gn ; gn<=gn_to;gn++)
populate into target file
Problem.: the code is giving me segmentation fault. Unable to find out where it is and why it is. Please help
Below is the source code.
definitions.h
------------
Code:
// Macro definitions
#define _EXIT_SUCCESS 0 // return value of exit on Success
#define _EXIT_FAILURE 1 // return value of exit on Failure
#define _ARGS 2 // Number of Arguments passed to the calling script
#define _BUFFER 1024
#define _CHUNK 100
#define _STREAM(x,y) fopen(x,y) // Alias for Read/Write to files
// Directory definitions
extern char *SRC_DIR="/home/hhulaman/1516/source/"; // Source directory path
extern char *LOG_DIR="/home/hhulaman/1516/log/"; // Log directory path
extern char *TMP_DIR="/home/hhulaman/1516/work/"; // Work directory path
extern char *ARCH_DIR="/home/hhulaman/1516/archive/"; // Archive directory path
// File names and extensions
extern char *LOG_NAME="FAP_PORT_OUT."; // Log file name
extern char *FIELD_SEP="|"; // Source file field separator
extern char *LOG_EXT=".log"; // log file extension
extern char *TMP_EXT=".Tmp"; // Tmp file extension
extern char *TRG_EXT=".Trg"; // Target file extension ( temp file )
extern char *ARCH_EXT=".Arch"; // Archive file extension
extern char DIR_SEP='/'; // Directory separator
port.c
------
Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include "definitions.h" /* Include the definitions.h file so as to use environment variables. */
/* prototypes */
int count_digit( int process_id );
int main(int argc, char *argv[])
{
FILE *log_stream, *source_stream, *data_stream, *arch_stream, *target_stream, *temp_stream ;
char *tmp_str, *ref_tmp_str, *mod_str, *ref_mod_str, *field, file_name[_CHUNK], curr_byte, prev_byte;
unsigned short int pos = 0, digit;
int record_cnt, decimal, sign;
double gn, gn_to;
pid_t pid;
time_t cTime;
/**************************************************************/
/*STRUCTURE AND VARIABLES FOR FAP PORT FILE ENTRY*/
/**************************************************************/
struct fap_port_out
{
char file_extraction_date[ 30 ];
char row_id[ 30 ];
char gn[ 30 ];
char gn_to[ 30 ];
char port_type[ 30 ];
char completion_date[ 30 ];
char donor_id[ 30 ];
char vfone_submission_date[ 30 ];
char min_due_date[ 30 ];
char postpay_tariff[ 30 ];
char con_status[ 30 ];
char reject_code[ 150 ];
struct fap_port_out *link;
} *port_point , *port_start , *port_prior ;
cTime = time( NULL );
if ( ( pid = getpid() ) < 0 ) //get the process id
{
printf( "\t[Error] : Unable to get the process id....Exiting\n" );
exit( _EXIT_FAILURE );
}
if ( ( tmp_str = ( char * ) malloc( _BUFFER ) ) == NULL ) /* allocating memory for temporary usage */
{
printf("\n\t[Error] : Memory fault for tmp_str....Exiting\n" );
exit( _EXIT_FAILURE );;
}
digit = count_digit( pid );
strcpy( tmp_str, LOG_DIR );
strcat( tmp_str, LOG_NAME );
strcat( tmp_str, ecvt( pid, digit, &decimal, &sign ) );
strcat( tmp_str, LOG_EXT );
if ( ( log_stream = _STREAM( tmp_str, "w" ) ) == NULL ) //file open for write only
{
printf( "\t[Error] : Unable to open file %s....Exiting\n", tmp_str );
exit( _EXIT_FAILURE );
}
fprintf( log_stream, "\n\t[Info] : Start\t\t\t%s\n", ctime( &cTime ) );
if( argc != _ARGS ) /* validating the number of arguments passed to the program */
{
fprintf( log_stream, "\n\t[Error] : Incorrect number of arguments");
exit( _EXIT_FAILURE );;
}
if ( ( source_stream = fopen ( *(++argv) , "r" ) ) == NULL ) /* validating the file mode of the informatica file */
{
printf("\n\t[Error] : Unable to read informatica param file %s",argv);
exit( _EXIT_FAILURE );;
}
fscanf( source_stream , "%s" , tmp_str ); /* reading the data file from the informatica file */
strcpy ( file_name , strrchr ( tmp_str , DIR_SEP ) + 1 );
fprintf( log_stream, "\n\t[Info] : Transforming data file %s", tmp_str );
fclose ( source_stream ) ; /* closing the informatica file */
if ( ( data_stream = fopen ( tmp_str , "r" ) ) == NULL ) /* validating the file mode of the data file */
{
fprintf( log_stream, "\n\t[Error] : Unable to read file %s",tmp_str);
exit( _EXIT_FAILURE );;
}
strcpy ( tmp_str , ARCH_DIR );
strcat ( tmp_str, file_name );
strcat ( tmp_str , ARCH_EXT );
fprintf( log_stream , "\n\t[Info] : Archive file %s\n", tmp_str );
if ( ( arch_stream = fopen ( tmp_str , "w" ) ) == NULL ) /* validating the file mode of the data file */
{
fprintf( log_stream , "\n\t[Error] : Unable to write to archive file %s",tmp_str);
exit( _EXIT_FAILURE );;
}
strcpy ( tmp_str , TMP_DIR );
strcat ( tmp_str, file_name );
strcat ( tmp_str , TMP_EXT );
if ( ( temp_stream = fopen ( tmp_str , "w" ) ) == NULL ) /* validating the file mode of the data file */
{
fprintf( log_stream , "\n\t[Error] : Unable to write to temp file %s",tmp_str);
exit( _EXIT_FAILURE );;
}
if ( ( field = ( char * ) malloc( _CHUNK ) ) == NULL ) /* allocating memory for field usage */
{
fprintf( log_stream , "\n\t[Error] : Unable to allocate memory for field" );
exit( _EXIT_FAILURE );;
}
if ( (mod_str = (char *) malloc ( _BUFFER ) ) == NULL )
{
fprintf( log_stream ,"\n\t[Error] : Unable to allocate memory for mod_str" );
exit( _EXIT_FAILURE );;
}
ref_mod_str = mod_str;
ref_tmp_str = tmp_str;
record_cnt = 0;
while ( fgets( tmp_str, _BUFFER, data_stream ) != NULL )
{
fputs ( tmp_str , arch_stream );
++record_cnt;
while ( *tmp_str != '\0' )
{
curr_byte = *tmp_str;
if ( curr_byte == '|' && prev_byte == '|' )
{
*(mod_str++)='F';
*(mod_str++)='N';
*(mod_str++)='U';
*(mod_str++)='L';
*(mod_str++)='L';
*(mod_str++)='|';
}
else
{
*mod_str=curr_byte;
mod_str++;
}
tmp_str++;
prev_byte = curr_byte;
}
*mod_str='\0';
mod_str=ref_mod_str;
if ( ( port_point = ( struct fap_port_out* ) malloc ( sizeof ( struct fap_port_out ) ) ) == NULL )
{
fprintf( log_stream, "\n\t[Error] : Unable to allocate memory for port_out");
exit ( _EXIT_FAILURE );
}
field = strtok ( mod_str , FIELD_SEP );
pos = 1;
while ( field != NULL )
{
if ( !( strcmp( field, "FNULL" ) ) )
{
strcpy( field, "" );
}
switch ( pos )
{
case 1 :
strcpy ( port_point->file_extraction_date , field );
break;
case 2 :
strcpy ( port_point->row_id , field );
break;
case 3 :
strcpy ( port_point->gn , field );
break;
case 4 :
strcpy ( port_point->gn_to , field );
break;
case 5 :
strcpy ( port_point->port_type , field );
break;
case 6 :
strcpy ( port_point->completion_date , field );
break;
case 7 :
strcpy ( port_point->donor_id , field );
break;
case 8 :
strcpy ( port_point->vfone_submission_date , field );
break;
case 9 :
strcpy ( port_point->min_due_date , field );
break;
case 10 :
strcpy ( port_point->postpay_tariff , field );
break;
case 11 :
strcpy ( port_point->con_status , field );
break;
case 12 :
strcpy ( port_point->reject_code , field );
break;
default :
fprintf( log_stream , "\n\t[Error] : Extra field at record %d\n",record_cnt );
break;
}
field = strtok ( NULL , FIELD_SEP );
pos++;
}
if ( record_cnt == 1 )
{
port_start = port_point;
}
port_prior->link = port_point;
port_point->link = NULL;
port_prior = port_point;
record_cnt++;
tmp_str = ref_tmp_str;
if ( !( strcmp( port_point->gn, "" ) && strcmp( port_point->gn_to, "" ) ) )
{
fprintf( log_stream , "\n\t[Error] : At Record No. %d of source file, Can't process...Pls check\n", record_cnt );
continue;
}
gn = atof( port_point->gn );
gn_to = atof( port_point->gn_to );
for ( ; gn <= gn_to ; gn++ )
fprintf( temp_stream , "%s|%s|%s|%s|%s|%s|%s|%s|%s|%s|%s",
port_point->file_extraction_date,
port_point->row_id,
gcvt( gn, 20, port_point->gn ),
port_point->port_type,
port_point->completion_date,
port_point->donor_id,
port_point->vfone_submission_date,
port_point->min_due_date,
port_point->postpay_tariff,
port_point->con_status,
port_point->reject_code
);
}
fclose ( arch_stream );
fclose ( temp_stream );
strcpy ( tmp_str , TMP_DIR );
strcat ( tmp_str, file_name );
strcat ( tmp_str , TMP_EXT );
if ( ( ref_tmp_str = ( char * ) malloc( _CHUNK ) ) == NULL ) /* allocating memory for field usage */
{
fprintf( log_stream , "\n\t[Error] : Unable to allocate memory for ref_tmp_str\n" );
exit( _EXIT_FAILURE );
}
strcpy ( ref_tmp_str , SRC_DIR );
strcat ( ref_tmp_str, file_name );
if ( rename( tmp_str, ref_tmp_str ) ) // Rename tmp file as Target file
{
fprintf( log_stream, "\n\t[Error] : Unable to rename %s to %s....Exiting\n", tmp_str, ref_tmp_str );
exit( _EXIT_FAILURE );
}
fprintf( log_stream, "\n\t[Info] : End\t\t\t%s", ctime( &cTime ) );
free ( ref_tmp_str );
free ( tmp_str );
free ( mod_str );
fclose ( data_stream );
fclose ( log_stream );
return( _EXIT_SUCCESS );
}
/*************************************************************************
**/
//FUNCTION TO FIND THE NUMBER OF DIGITS
/*************************************************************************
**/
int count_digit( int process_id )
{
int cnt = 0;
while ( process_id > 0 )
{
process_id = process_id / 10 ;
cnt++;
}
return ( cnt );
}
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