readimage.c

#include <stdlib.h>
#include <stdio.h>
#include <sys/stat.h>

/*
 * memory allocation sub routine that DOES NOT fail
 */
void* tryAllocate()
{
        void* buffer;
        while((buffer = malloc(10)) == NULL)
                sleep(1);
        return buffer;
}


int main(int argc, char** argv)
{
        if(argc != 2)  {
                printf("Usage: %s <FILE>\n", argv[0]);
                return 1;
        }

        struct stat st;
        if(stat(argv[1], &st) < 0) {
                printf("error: error reading file\n");
                return 1;
        }

        char* buffer;

        buffer = malloc(st.st_size + 1);

        if(!buffer) {
                printf("error: error allocating memory\n");
                return 1;
        }

        FILE* fp = fopen(argv[1], "r");

        if(!fp) {
                free(buffer);
                printf("error opening file\n");
                return 1;
        }

        fread(buffer, st.st_size, 1, fp);

        fclose(fp);

        buffer[st.st_size] = '\0';

        printf("%s", buffer);

        free(buffer);

        return 0;
}