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git/copy.c
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#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("copy-fd: read returned %s", strerror(errno)); | |
break; | |
case COPY_WRITE_ERROR: | |
error("copy-fd: write returned %s", strerror(errno)); | |
break; | |
} | |
close(fdi); | |
if (close(fdo) != 0) | |
return error("%s: close error: %s", dst, strerror(errno)); | |
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; | |
} |