1 /*! cc -o cp cp.c */

2 #include <stdio.h>

3 #include <string.h>

4 #include <errno.h>

5 #include <unistd.h>

6 #include <sys/types.h>

7 #include <sys/stat.h>

8

9 int copy_file(const char *sname, const char *dname);

10

11 char buf[4096];

12

13 int main(int argc, char **argv)

14 {

15 int i, src_count = argc - 2;

16

17 if(src_count > 1) {

18 struct stat st;

19 char *to_dir = argv[argc - 1];

20

21 if(stat(to_dir, &st) == -1) {

22 fprintf(stderr, "failed to stat %s: %s\n", to_dir, strerror(errno));

23 return 1;

24 }

25

26 for(i=0; i<src_count; i++) {

27 sprintf(buf, "%s/%s", to_dir, argv[i+1]);

28 if(copy_file(argv[i+1], buf) == -1) {

29 return 1;

30 }

31 }

32 return 0;

33 }

34

35 return copy_file(argv[1], argv[2]) == -1 ? 1 : 0;

36 }

37

38 int copy_file(const char *sname, const char *dname)

39 {

40 FILE *src, *dst;

41 size_t brd;

42

43 if(!(src = fopen(sname, "rb"))) {

44 fprintf(stderr, "failed to open source file %s: %s\n", sname, strerror(errno));

45 return -1;

46 }

47 if(!(dst = fopen(dname, "wb"))) {

48 fclose(src);

49 fprintf(stderr, "failed to open destination file %s: %s\n", dname, strerror(errno));

50 return -1;

51 }

52

53 while((brd = fread(buf, 1, sizeof buf, src)) > 0) {

54 fwrite(buf, 1, brd, dst);

55 }

56

57 fclose(dst);

58 fclose(src);

59 return 0;

60 }