Gets a specified line from a file.

getline.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>


// Types and stuff
#include <ctype.h>
#include <stdint.h>

typedef struct _arr{
	char* arr;
	size_t len;
};

typedef struct _arr arr_t;

char* read_file(char* filenm, long unsigned int* len){
  char* buf=0;
  FILE* f=fopen(filenm, "rb");
  if(f){
    fseek(f,0,SEEK_END);
    *len=ftell(f);
    fseek(f,0,SEEK_SET);
    buf=(char*)calloc(1, *len);
    if(buf)
      fread(buf, 1, *len, f);
    fclose(f);
  }
  return buf;

}
char** atokl(char* InC, char* delim, long unsigned int* len){
  char** tok=(char**)malloc(2*sizeof(char*));
  //printf("%p\n", tok);

  tok[0]=strtok(strdup(InC), delim);
  {
  int i=1;
  while(tok[i-1]!=NULL){
    tok=(char**)realloc(tok, (i+1)*sizeof(char*));
    tok[i]=strtok(NULL, delim);
    //printf("%p\n", tok[i]);
    i++;
  
  }
  *len=i;
  /*EBRACE*/}
   
  return tok;
}
int main(int argc, char** argv){
	if(argc<3){
		printf("Usage: %s <filenm> <line_num>\n");
		return 0;
	}
	arr_t f;
	f.arr=read_file(argv[1], &f.len);
	if(!f.arr){
#ifdef __unix__
		puts("\033[1;31mCannot read file! Check filenm.\033[0m");
#else
		puts("Cannot read file! Check filenm.");
#endif
	}
	int ln=atoi(argv[2]);
	arr_t lines;
	lines.arr=atokl(f.arr, "\n", &lines.len);
	puts(((char**)lines.arr)[ln]);
	
	return 0;
}