109 lines
2.8 KiB
C
109 lines
2.8 KiB
C
// UNIX cp copy
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// Wrote for Computer Networks and Systems lab classes
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// AUTHOR : Sergiusz Warga
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#define BUFFER_SIZE 8 // TODO: Think about it.
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enum ERROR{NO_ARGUMENTS, WRONG_ARGUMENT, DUNNO};
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int print_error_message(enum ERROR error_type) {
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if (error_type == NO_ARGUMENTS) {
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fprintf(stderr,"cp: missing file operand\n"); // TODO: Maybe replace "cp" with argv[0]?
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fprintf(stderr,"Try cp --help for more information.\n");
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return 0;
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} else if (error_type == WRONG_ARGUMENT) {
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fprintf(stderr, "cp: unrecognized option\n");
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fprintf(stderr,"Try cp --help for more information.\n");
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} else if (error_type == DUNNO) {
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fprintf(stderr, "Something went wrong!\n");
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}
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return 0;
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}
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int print_help() {
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printf("HELP\n");
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return 0;
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}
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int is_dir(const char *name) {
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struct stat path;
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stat(name, &path);
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return S_ISDIR(path.st_mode);
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}
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int cp(char *old_name, char *new_name) {
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// int cp(char *old_argv, char *new_argv) {
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// char *old_name, *new_name;
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// strncpy(old_name, old_argv, sizeof(old_argv));
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// strncpy(new_name, new_argv, sizeof(new_argv));
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int old, new;
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if (is_dir(new_name)) {
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printf("%s\n", new_name);
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strncat(new_name, "/", 1);
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printf("%s\n", new_name);
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strncat(new_name, old_name, sizeof(old_name));
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printf("%s\n", new_name);
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}
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printf("Moving %s to %s\n", old_name, new_name);
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old = open(old_name, O_RDONLY);
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new = open(new_name, O_CREAT | O_WRONLY);
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char buffer[BUFFER_SIZE];
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int read_bytes;
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while ((read_bytes = read(old, buffer, sizeof(buffer))) > 0) {
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write(new, buffer, read_bytes);
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}
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printf("%s moved to %s\n", old_name, new_name);
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close(old);
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close(new);
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return 0;
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}
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int copy_mod_bits(char *old_name, char *new_name) {
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struct stat mod_bits;
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stat(old_name, &mod_bits);
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chmod(new_name, mod_bits.st_mode);
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return 0;
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}
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int main(int argc, char *argv[]) {
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if (argc == 1) {
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print_error_message(NO_ARGUMENTS);
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return 1;
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}
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if (argc == 2) {
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if (strcmp(argv[1], "--help") == 0) {
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print_help();
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return 0;
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} else {
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print_error_message(WRONG_ARGUMENT);
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return 2;
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}
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}
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if (argc == 3) {
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if (cp(argv[1], argv[2]) > 0) return 1;
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copy_mod_bits(argv[1], argv[2]);
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}
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if (argc > 3) {
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int no_of_old_files = argc - 2;
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for (int i = 1; i <= no_of_old_files; ++i) {
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printf("TOOO %s\n", argv[argc-1]);
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if (cp(argv[i], argv[argc-1]) > 0) return 1;
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copy_mod_bits(argv[i], argv[argc-1]);
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}
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}
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return 0;
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} |