multif/multif.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <dirent.h>
#include <unistd.h>
#include <errno.h>

int main(int argc, char *argv[])
{
	DIR* FD;
	struct dirent* in_file;
	FILE    *entry_file;
	char    buffer[BUFSIZ];
	char *line = NULL;
	size_t len = 0;
	ssize_t lineSize = 0;
	int burst = 1;
	if (argc < 2)
	{
		fprintf(stderr, "Error : You must specify a directory\n");
		return 1;
	}
	if (argc >= 3)
		burst = atoi(argv[2]);
	if (burst <= 0)
	{
		fprintf(stderr, "Error : burst must be an integer greater than 0\n");
		return 1;
	}

	char *directory = argv[1];
	strcat(directory, "/");
	/* Scanning the in directory */
	if (NULL == (FD = opendir (argv[1]))) 
	{
		fprintf(stderr, "Error : Failed to open input directory - %s\n", strerror(errno));

		return 1;
	}

	while (lineSize != -1)
	{
		while ((in_file = readdir(FD))) 
		{

			if (!strcmp (in_file->d_name, ".") || !strcmp (in_file->d_name, ".."))
				continue;

			char entry_path[4096];
			strcpy(entry_path,directory);
			strcat(entry_path,in_file->d_name);

			int c;
			for (c = 0; c < burst; c++) {
				char *line = NULL;
				entry_file = fopen(entry_path, "a");
				if (entry_file == NULL)
				{
					fprintf(stderr, "Error : Failed to open entry file - %s\n", strerror(errno));

					return 1;
				}

				lineSize = getline(&line, &len, stdin);
				if (lineSize == -1)
					return 0;

				fprintf(entry_file, line);

				/* When you finish with the file, close it */
				fclose(entry_file);
				free(line);
			}
		}
		rewinddir(FD);
	}
	return 0;
}