C code not displaying output

Here is the full code:

#include <stdio.h>
#include <ctype.h>
#include <math.h>
#include <stdlib.h>
#include <dirent.h>
#include <errno.h>
#include <sys/stat.h>
#include <string.h>
#include <time.h>

#define E_INVALIDSWITCH  100
#define E_TOOMANYPARAMS  101
#define E_TOOFEWPARAMS   102
#define E_OPENDIRFAIL    103

#define MAX_DIR_NAME_SIZE 100

void status();        
void greetDirectory(char * baseDir, char * modDir);

int main(int argc, char ** argv)
{
    int R_switch = 0;
    char modDir[MAX_DIR_NAME_SIZE] = {0};
    char baseDir[MAX_DIR_NAME_SIZE] = {0};

    int i;
    for (i = 1; i < argc; i++)
    {
        if (argv[i][0] == '-')
        {

            if (strcmp(argv[i], "-R") == 0)
            {
            R_switch = 1;
            continue;
            }

            else
            {
                fprintf(stderr, "Error: Invalid switch %s\n", argv[i]);
                status();
                return E_INVALIDSWITCH;
            }
        }

        else
        {
            if (baseDir[0] == 0 && modDir[0] == 0)
            {
                strcpy(baseDir, argv[i]);
                strcpy(modDir, argv[i]);
            }
            else
            {
                fprintf(stderr, "Error: Too many parameters\n");
                status();
                return E_TOOMANYPARAMS;
            }
        }
    }

    if (modDir[0] == 0)
    {
        fprintf(stderr, "Error: Too few parameters\n");
        status();
        return E_TOOFEWPARAMS;
    }

    if (R_switch)
    {
    greetDirectory(baseDir, modDir);
    }
    return 0;
}

void status()
{
    printf("\t-R\tGreet all files in current directory\n");
    printf("\t<modDir>\tName of person being greeted\n");
}

char *formatdate(char *buff, time_t val)
{
    strftime(buff,200, "%d.%m.%Y %H:%M:%S", localtime(&val));
    return buff;
}

void greetDirectory(char * baseDir, char * modDir)
{
    DIR * directory;
    struct dirent * dirInfo;

    directory = opendir(baseDir);
    if (directory == NULL)
    {
        fprintf(stderr,
            "opendir() failed for '%s', errno=%d\n",
            baseDir,
            errno);
        exit(E_OPENDIRFAIL);
    }

    while((dirInfo = readdir(directory)) != NULL)
    {
        if (strcmp(dirInfo->d_name, ".") != 0 &&
            strcmp(dirInfo->d_name, "..") != 0)
        {
            /* BASE DIR*/
            char basePathName[PATH_MAX];
            strcpy(basePathName, baseDir);
            strcat(basePathName, "/");
            strcat(basePathName, dirInfo->d_name);

            /* MOD DIR */
            char modPathName[PATH_MAX];
            strcpy(modPathName, modDir);
            strcat(modPathName, "/");
            strcat(modPathName, dirInfo->d_name);

            struct stat statBuf;
            struct stat otherStatBuf;
            if (stat(basePathName, &statBuf) == -1)
            {
                /* error! */
                fprintf(stderr, "stat() failed for '%s'", basePathName);
            }
            else
            {
                //display time
                stat(modPathName, &otherStatBuf);
                if (statBuf.st_mtime > otherStatBuf.st_mtime)
                {
                    char date[36];
                    printf("Modify: %s\n", formatdate(date, otherStatBuf.st_mtime));
                }

                if (S_ISDIR(statBuf.st_mode))
                {
                    /* if this is a directory, then recurse! */
                    greetDirectory(basePathName, modPathName);
                }
                else
                {
                    /* else if it's a file, then greet it! */
                    printf("entry name = %s\n", modPathName);
                }
            }
        }
    }

    closedir(directory);    
}

The main problem was in your loop where you assign values to modDir and baseDir. Say, for example, you have the argument -R, so you want to print out the directory names. You assign R_switch a value of 1 since argv[1] is -R. The problem is, you go on in the loop to assign baseDir and modDir -R as well! This should have been done on the next iteration of the loop, when argv[2] is whatever directory you put in for input.

The very simple way to solve this problem is to add a continue; statement after you set R_switch a value of 1.

^{Also note that while playing around, I did create the limitation of having a MAX_DIR_NAME_SIZE, when it was not needed with the char * you were working with originally. It should be fairly easy to change this back. I also ended up changing the comparison of modDir and baseDir to something like if (baseDir[0] == 0 && modDir[0] == 0), which probably should have still been done by comparing your char * to NULL (like it was originally).}