118 lines
2.3 KiB
C
118 lines
2.3 KiB
C
#include <stdio.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <libgen.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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char *make_path(const char *src, const char *dst) {
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size_t len = strlen(src) + strlen(dst) + 2;
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char *full_path = malloc(len + 1);
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if (full_path == NULL) {
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fprintf(stderr, "cp: malloc() returned NULL\n");
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return NULL;
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}
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snprintf(full_path, len, "%s/%s", src, dst);
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return full_path;
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}
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int write_buffer(int ifd, int ofd) {
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char buf[4096];
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size_t bytes = 0;
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while ((bytes = read(ifd, buf, sizeof(buf))) > 0)
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if (write(ofd, buf, bytes) != bytes)
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return 1;
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return 0;
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}
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int copy(const char *src, const char *dst) {
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int ifd = open(src, O_RDONLY);
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if (ifd < 0)
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return 1;
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int ofd = open(dst, O_CREAT | O_TRUNC | O_WRONLY, 0666);
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if (ofd < 0) {
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close(ifd);
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return 1;
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}
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if (write_buffer(ifd, ofd))
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fprintf(stderr, "cp: (%s %s) %s\n", src, dst, strerror(errno));
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close(ifd);
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close(ofd);
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return 0;
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}
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int get_stat(const char *path, struct stat *stat_path) {
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if (stat(path, stat_path)) {
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fprintf(stderr, "cp: unable to stat %s: %s\n", path, strerror(errno));
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return 1;
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}
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return 0;
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}
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int cptree(const char *src, const char *dst) {
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struct stat stat_path;
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get_stat(src, &stat_path);
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printf("%s %s\n", src, dst);
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if (S_ISDIR(stat_path.st_mode) == 0) {
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if (copy(src, dst)) {
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fprintf(stderr, "cp: %s: copy() failed (%s)\n", src, strerror(errno));
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return 1;
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}
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return 0;
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}
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else if (mkdir(dst, 0777) < 0) {
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fprintf(stderr, "cp: %s\n", strerror(errno));
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}
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DIR *dir = opendir(src);
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if (dir == NULL) {
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fprintf(stderr, "cp: %s: Can`t open directory\n", src);
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return 1;
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}
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struct dirent *ep;
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while ((ep = readdir(dir)) != NULL) {
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if (!strcmp(ep->d_name, ".") || !strcmp(ep->d_name, ".."))
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continue;
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char *src_path = make_path(src, ep->d_name);
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if (src_path == NULL)
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return 1;
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char *dst_path = make_path(dst, ep->d_name);
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if (dst_path == NULL)
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return 1;
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cptree(src_path, dst_path);
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free(src_path);
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free(dst_path);
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}
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closedir(dir);
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return 0;
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}
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int main(const int argc, const char **argv) {
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if (argc < 2 || !strcmp(argv[1], "-h")) {
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printf("cp [Src] [Dst]\n");
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return 0;
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}
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return cptree(argv[1], argv[2]);
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}
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