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#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#define FALSE 0
#define TRUE 1
#define BUFFER_LEN 1000
#define NUM_STRINGS 4000
int shellexp(char*, char*);
int main(int argc, char **argv) {
char (*strings)[BUFFER_LEN] = calloc(NUM_STRINGS, BUFFER_LEN);
char buffer[BUFFER_LEN];
FILE* exp_list;
int n_strings = 0;
int i;
if (!strings)
{
return EXIT_FAILURE;
}
/* Read into memory all patterns from the files specified as command line
* arguments */
for ( i = 1; i < argc; i++ ) {
exp_list = fopen( argv[i], "r" );
if ( exp_list == NULL ) {
perror( argv[i] );
continue;
}
while( fgets( strings[n_strings], BUFFER_LEN, exp_list ) ) {
char*pch;
char*buffer = strings[n_strings];
for ( pch = buffer; *pch != '\0'; pch++ ) {
/* Skip comments */
if ( *pch == '#' ) {
*pch = '\0';
break;
}
}
/* Trim trailing whitespace */
for ( pch = pch - 1;
pch >= buffer && isspace(*pch);
pch-- )
;
*(pch+1) = '\0';
n_strings++;
if ( n_strings == NUM_STRINGS ) {
fprintf(stderr, "You have more than %d patterns defined. Change NUM_STRINGS definition in "__FILE__" and recompile.\n", NUM_STRINGS);
exit(EXIT_FAILURE);
}
continue;
/* XXX: the following code is unreachable */
/* Trim leading whitespace */
if ( isspace(buffer[0]) ) {
for ( pch = buffer + 1; isspace(*pch) && *pch; pch++ ) ;
memmove( buffer, pch, strlen(pch) + 1 );
}
if ( buffer[0] == '\0' ) continue;
n_strings++;
}
fclose( exp_list );
}
/* Copy lines from standard input to standard output, skipping the ones
* which matched at least one of the loaded patterns */
while( fgets( buffer, BUFFER_LEN, stdin ) ) {
int match;
match = FALSE;
if ( buffer[strlen(buffer)-1] == '\n' )
buffer[strlen(buffer)-1]='\0';
for ( i = 0; !match && i < n_strings; i++ ) {
match = shellexp( buffer, strings[i] );
}
if ( !match ) {
if (printf("%s\n", buffer) < 0)
{
free(strings);
return EXIT_FAILURE;
}
}
}
free(strings);
if (fclose(stdout) != 0)
return EXIT_FAILURE;
return EXIT_SUCCESS;
}
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