copr.c

#include <linux/limits.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

void printHelp();
void copy(const char *arg, const char *cwd);
void paste();
int isDir(const char *path);
void showClipboardContents();
void clearClipboard() { remove("/tmp/copr.txt"); }

int main(int argc, char *argv[]) {

  char cwd[PATH_MAX];

  if (getcwd(cwd, sizeof(cwd)) == NULL) {
    perror("getcwd() error");
    return 1;
  }
  if (argc < 2 || argc > 3) {
    printf("Copr: invalid arguments\n");
    printf("For help: copr -h\n");
    return 0;
  }

  if (argc == 2) {

    if (strcmp(argv[1], "-c") == 0) {
      copy("null", cwd);
    } else if (strcmp(argv[1], "-p") == 0) {
      paste();
    } else if (strcmp(argv[1], "-h") == 0) {
      printHelp();
    } else if (strcmp(argv[1], "-r") == 0) {
      clearClipboard();
      printf("Copr: clipboard cleared\n");
    } else if (strcmp(argv[1], "-d") == 0) {
      showClipboardContents();
    } else {
      printf("Copr: unknown arg\n");
    }
  } else if (argc == 3) {

    if (strcmp(argv[1], "-c") == 0) {
      copy(argv[2], cwd);
    } else if (strcmp(argv[1], "-p") == 0) {
      printf("Copr: too many args\n");
    } else if (strcmp(argv[1], "-h") == 0) {
      printHelp();
    } else if (strcmp(argv[1], "-r") == 0) {
      clearClipboard();
      printf("Copr: clipboard cleared\n");
    } else if (strcmp(argv[1], "-d") == 0) {
      showClipboardContents();
    } else {
      printf("Copr: unknown arg\n");
    }
  }
  return 0;
}

void printHelp() {
  printf("Copr: usage: copr [-c] [-p] [-r] [file]\n");
  printf("Copr: -c: copy file or current directory\n");
  printf("Copr: -p: paste file\n");
  printf("Copr: -d: show clipboard contents\n");
  printf("Copr: -r: remove file from clipboard\n");
}

void copy(const char *arg, const char *cwd) {
  // var to hold full path
  char path[PATH_MAX];

  // if arg is none then copy current directory
  if (strcmp(arg, "null") == 0) {
    strcpy(path, cwd);
    printf("Copr copied: %s\n", path);
  }
  // else copy path and add filename
  else {
    strcpy(path, cwd);
    strcat(path, "/");
    strcat(path, arg);
    if (access(path, F_OK) != 0) {
      printf("Copr: file does not exist\n");
      exit(1);
    }
    printf("Copr copied: %s\n", path);
  }
  // remove file if it exists
  clearClipboard();
  // open file and write path
  FILE *file;
  file = fopen("/tmp/copr.txt", "w");
  if (file == NULL) {
    printf("copr: error copying\n");
    exit(1);
  }
  fprintf(file, "%s", path);
  fclose(file);
}

// returns 1 if arg is a directory else 0
int isDir(const char *path) {
  struct stat statbuf;
  if (stat(path, &statbuf) != 0) {
    return 0;
  }
  return S_ISDIR(statbuf.st_mode);
}

void paste() {
  // var to hold path from file
  char path[PATH_MAX];
  // open file and read path
  FILE *file;
  file = fopen("/tmp/copr.txt", "r");
  if (file == NULL) {
    printf("Copr: Nothing in clipboard\n");
    exit(1);
  }
  fscanf(file, "%s", path);
  fclose(file);

  // check if file or dir
  bool dir = isDir(path);
  // copy file or dir to current directory
  if (dir == 1) {
    char *cmd = malloc(strlen("cp -r ") + strlen(path) + strlen(" .") + 1);
    strcpy(cmd, "cp -r ");
    strcat(cmd, path);
    strcat(cmd, " .");
    system(cmd);
    free(cmd);
  } else {
    char *cmd = malloc(strlen("cp ") + strlen(path) + strlen(" .") + 1);
    strcpy(cmd, "cp ");
    strcat(cmd, path);
    strcat(cmd, " .");
    system(cmd);
    free(cmd);
  }
  printf("Copr pasted: %s\n", path);
}

void showClipboardContents() {
  char path[PATH_MAX];
  FILE *file;
  file = fopen("/tmp/copr.txt", "r");
  if (file == NULL) {
    printf("Copr: Nothing in clipboard\n");
    exit(1);
  }
  fscanf(file, "%s", path);
  fclose(file);
  printf("Copr: %s\n", path);
}