Git 2.2.2
[git/git.git] / copy.c
CommitLineData
f3123c4a
JH
1#include "cache.h"
2
3int copy_fd(int ifd, int ofd)
4{
5 while (1) {
f3123c4a 6 char buffer[8192];
8a912bcb 7 ssize_t len = xread(ifd, buffer, sizeof(buffer));
f3123c4a
JH
8 if (!len)
9 break;
10 if (len < 0) {
f3123c4a 11 return error("copy-fd: read returned %s",
b29763aa 12 strerror(errno));
f3123c4a 13 }
b29763aa
SP
14 if (write_in_full(ofd, buffer, len) < 0)
15 return error("copy-fd: write returned %s",
16 strerror(errno));
f3123c4a 17 }
f3123c4a
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18 return 0;
19}
1468bd47 20
f7835a25
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21static int copy_times(const char *dst, const char *src)
22{
23 struct stat st;
24 struct utimbuf times;
25 if (stat(src, &st) < 0)
26 return -1;
27 times.actime = st.st_atime;
28 times.modtime = st.st_mtime;
29 if (utime(dst, &times) < 0)
30 return -1;
31 return 0;
32}
33
1468bd47
DB
34int copy_file(const char *dst, const char *src, int mode)
35{
36 int fdi, fdo, status;
37
38 mode = (mode & 0111) ? 0777 : 0666;
39 if ((fdi = open(src, O_RDONLY)) < 0)
40 return fdi;
41 if ((fdo = open(dst, O_WRONLY | O_CREAT | O_EXCL, mode)) < 0) {
42 close(fdi);
43 return fdo;
44 }
45 status = copy_fd(fdi, fdo);
b29763aa 46 close(fdi);
1468bd47 47 if (close(fdo) != 0)
8b1f6de8 48 return error("%s: close error: %s", dst, strerror(errno));
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DB
49
50 if (!status && adjust_shared_perm(dst))
51 return -1;
52
53 return status;
54}
f7835a25
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55
56int copy_file_with_time(const char *dst, const char *src, int mode)
57{
58 int status = copy_file(dst, src, mode);
59 if (!status)
60 return copy_times(dst, src);
61 return status;
62}