void *util_safe_malloc(int size) {
void *ptr = calloc(1, size);
if (!ptr) {
printf("Error allocating %d bytes\n", size);
util_quit("Out of memory");
}
return ptr;
}
int main( int argc, char **argv )
/*******************************/
{
int i, ch;
FILE *fh;
int more_than_one;
while( (ch = getopt( argc, argv, ":clmw" )) != -1 ) {
switch( ch ) {
case 'c':
char_flag = 1;
break;
case 'l':
line_flag = 1;
break;
case 'm':
char_flag = 1;
mult_flag = 1;
break;
case 'w':
word_flag = 1;
break;
case '?':
util_quit( usage_text, NULL );
}
}
/* Skip option arguments and argv[0] */
argc = argc - optind;
argv += optind;
if( !word_flag && !line_flag && !char_flag ) {
word_flag = line_flag = char_flag = 1;
}
if( argc == 0 ) {
do_wc( stdin, NULL );
} else {
i = 0;
more_than_one = 0;
for( ;; ) {
fh = fopen( argv[i], "r" );
if( fh == NULL ) {
fprintf( stderr, "wc: error opening '%s' for read: %s\n",
argv[i], strerror( errno ) );
return( EXIT_FAILURE );
}
do_wc( fh, argv[i] );
fclose( fh );
++i;
if( i == argc ) break;
more_than_one = 1;
}
if( more_than_one ) {
print_line( total_lines, total_words, total_chars, "total" );
}
}
return( EXIT_SUCCESS );
}
int main( int argc, char **argv )
/*******************************/
{
int i, ch;
char *env_value;
env_value = getenv( "PATH" );
while( (ch = getopt( argc, argv, ":ae:" )) != -1 ) {
switch( ch ) {
case 'a':
find_all = 1;
break;
case 'e':
if( *optarg == '=' ) {
++optarg;
};
env_value = getenv( optarg );
break;
case ':':
util_quit( usage_text, "which: invalid argument\n" );
case '?':
util_quit( usage_text, NULL );
}
}
/* skip option arguments */
argc = argc - optind + 1;
argv += optind - 1;
if( argc < 2 ) {
util_quit( usage_text, "which: must specify at least 1 filename\n" );
}
found_file = 0;
for( i = 1; i < argc; ++i ) {
work( env_value, argv[i] );
}
return( found_file == 0 );
}
int main( int argc, char **argv )
/*******************************/
{
int ch;
int unbuff_flag = 0;
int fh;
setvbuf( stdin, NULL, _IONBF, 0 );
while( (ch = getopt( argc, argv, ":u" )) != -1 ) {
switch( ch ) {
case 'u':
unbuff_flag = 1; /* currently unused */
break;
case '?':
util_quit( usage_text, NULL );
}
}
/* Skip option arguments and argv[0] */
argc = argc - optind;
argv += optind;
setmode( STDOUT_FILENO, O_BINARY );
if( argc == 0 ) {
setmode( STDIN_FILENO, O_BINARY );
do_cat( STDIN_FILENO );
} else {
while( *argv != NULL ) {
fh = open( *argv, O_RDONLY | O_BINARY );
if( fh == -1 ) {
fprintf( stderr, "cat: error opening '%s' for read: %s\n",
*argv, strerror( errno ) );
return( EXIT_FAILURE );
} else {
do_cat( fh );
close( fh );
}
argv++;
}
}
return( EXIT_SUCCESS );
}
