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#include <assert.h>
#include <stdio.h>
#include <sys/types.h>
#include <stdlib.h>
#include <readline/readline.h>
#include <readline/rlconf.h>
#include <libgen.h>
#include <stdbool.h>
#include <unistd.h>
#include "rename.h"
bool file_exists(const char *filename) { return (access(filename, F_OK) == 0); }
char *update_file_name(char *old_file_name, FILE *newin) {
fprintf(newin, "%s", old_file_name);
char *new_file_name = readline("New name: ");
return new_file_name;
}
bool ask_for_confirmation(char *prompt) {
bool return_value = false;
char *confirmation = readline(prompt);
if (strcmp(confirmation, "y") == 0)
return_value = true;
free(confirmation);
return return_value;
}
int main() {
const char *newin_name = tempnam(NULL, NULL);
FILE *newin = fopen(newin_name, "w");
if (!newin)
perror("Failed to create tempfile");
FILE *_ = freopen(newin_name, "r", stdin);
char *old_file_name = getenv("f");
old_file_name = basename(old_file_name);
char *new_file_name = (char *)NULL;
char *current_file_name = (char *)malloc(sizeof(char) * 255);
const char *original_file_name = getenv("f");
int done = false;
while (!done) {
if (old_file_name) {
new_file_name = update_file_name(old_file_name, newin);
old_file_name = (char *)NULL;
} else {
new_file_name = update_file_name(current_file_name, newin);
}
if (file_exists(new_file_name)) {
char *prompt = malloc(sizeof(char) * (255 + 43));
snprintf(prompt, 43 + 255,
"Name (`%s`) already exists, overwrite [y|N]: ", new_file_name);
if (ask_for_confirmation(prompt))
done = true;
free(prompt);
} else if (new_file_name[0] == '\0') {
/* new_file_name is emtpy */
if (ask_for_confirmation("Name is empty, accept nevertheless [y|N]: "))
done = true;
} else {
done = true;
}
if (!done) {
strcpy(current_file_name, new_file_name);
free(new_file_name);
new_file_name = (char *)NULL;
}
}
// rename old file with new name
if (rename(original_file_name, new_file_name) == 0) {
printf("File renamed successfully.\n");
} else {
perror("Unable to rename files. Please check files exist and you have "
"permissions to modify files");
}
free(new_file_name);
}
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