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Cut down on the required number of syscalls by using the new Haiku API

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for reading/writing attributes.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31311 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stephan Aßmus
2009-06-29 09:35:39 +00:00
parent 125f5b846c
commit 8fb7098371
1 changed files with 23 additions and 8 deletions
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src/bin/coreutils/src/copy.c
+23 -8
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@@ -18,6 +18,7 @@
#include <config.h>
#include <stdio.h>
#include <unistd.h>
#include <assert.h>
#include <sys/types.h>
#include <selinux/selinux.h>
@@ -147,35 +148,49 @@ copy_attributes(int fromFd, int toFd)
return -1;
while ((dirent = fs_read_attr_dir(attributes)) != NULL) {
attr_info info;
struct stat stat;
off_t pos = 0;
int attrFromFD = fs_open_attr(fromFd, dirent->d_name, 0, O_RDONLY);
int attrToFD;
if (fs_stat_attr(fromFd, dirent->d_name, &info) != 0)
if (attrFromFD < 0)
continue;
if (fstat(attrFromFD, &stat) != 0) {
close(attrFromFD);
continue;
}
attrToFD = fs_open_attr(toFd, dirent->d_name, stat.st_type,
O_WRONLY | O_TRUNC | O_CREAT);
if (attrToFD < 0) {
close(attrFromFD);
continue;
}
while (true) {
ssize_t bytesRead, bytesWritten;
bytesRead = fs_read_attr(fromFd, dirent->d_name, info.type, pos,
buffer, sizeof(buffer));
bytesRead = read_pos(attrFromFD, pos, buffer, sizeof(buffer));
if (bytesRead < 0) {
fprintf(stderr, "error reading attribute '%s'", dirent->d_name);
break;
}
bytesWritten = fs_write_attr(toFd, dirent->d_name, info.type, pos,
buffer, bytesRead);
bytesWritten = write_pos(attrToFD, pos, buffer, bytesRead);
if (bytesWritten != bytesRead) {
fprintf(stderr, "error writing attribute '%s'", dirent->d_name);
break;
}
pos += bytesWritten;
info.size -= bytesWritten;
stat.st_size -= bytesWritten;
if (info.size <= 0)
if (stat.st_size <= 0)
break;
}
close(attrToFD);
close(attrFromFD);
}
fs_close_attr_dir(attributes);