68 lines
1.3 KiB
C
68 lines
1.3 KiB
C
#include "cache.h"
|
|
|
|
int copy_fd(int ifd, int ofd)
|
|
{
|
|
while (1) {
|
|
char buffer[8192];
|
|
ssize_t len = xread(ifd, buffer, sizeof(buffer));
|
|
if (!len)
|
|
break;
|
|
if (len < 0)
|
|
return COPY_READ_ERROR;
|
|
if (write_in_full(ofd, buffer, len) < 0)
|
|
return COPY_WRITE_ERROR;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int copy_times(const char *dst, const char *src)
|
|
{
|
|
struct stat st;
|
|
struct utimbuf times;
|
|
if (stat(src, &st) < 0)
|
|
return -1;
|
|
times.actime = st.st_atime;
|
|
times.modtime = st.st_mtime;
|
|
if (utime(dst, ×) < 0)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
int copy_file(const char *dst, const char *src, int mode)
|
|
{
|
|
int fdi, fdo, status;
|
|
|
|
mode = (mode & 0111) ? 0777 : 0666;
|
|
if ((fdi = open(src, O_RDONLY)) < 0)
|
|
return fdi;
|
|
if ((fdo = open(dst, O_WRONLY | O_CREAT | O_EXCL, mode)) < 0) {
|
|
close(fdi);
|
|
return fdo;
|
|
}
|
|
status = copy_fd(fdi, fdo);
|
|
switch (status) {
|
|
case COPY_READ_ERROR:
|
|
error_errno("copy-fd: read returned");
|
|
break;
|
|
case COPY_WRITE_ERROR:
|
|
error_errno("copy-fd: write returned");
|
|
break;
|
|
}
|
|
close(fdi);
|
|
if (close(fdo) != 0)
|
|
return error_errno("%s: close error", dst);
|
|
|
|
if (!status && adjust_shared_perm(dst))
|
|
return -1;
|
|
|
|
return status;
|
|
}
|
|
|
|
int copy_file_with_time(const char *dst, const char *src, int mode)
|
|
{
|
|
int status = copy_file(dst, src, mode);
|
|
if (!status)
|
|
return copy_times(dst, src);
|
|
return status;
|
|
}
|