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FileManager: Make copying faster with ftruncate() and a bigger buffer

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Apply the same techniques from "cp" to make copying files much faster.
This commit is contained in:
Andreas Kling 2019-11-04 16:34:25 +01:00
parent 721585473b
commit f76168a3ea
1 changed files with 9 additions and 2 deletions
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11
Applications/FileManager/FileUtils.cpp
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@ -74,8 +74,15 @@ bool copy_file(const String& src_path, const String& dst_path, const struct stat
} }
} }
if (src_stat.st_size > 0) {
if (ftruncate(dst_fd, src_stat.st_size) < 0) {
perror("cp: ftruncate");
return false;
}
}
for (;;) { for (;;) {
char buffer[BUFSIZ]; char buffer[32768];
ssize_t nread = read(src_fd, buffer, sizeof(buffer)); ssize_t nread = read(src_fd, buffer, sizeof(buffer));
if (nread < 0) { if (nread < 0) {
return false; return false;
@ -130,4 +137,4 @@ String get_duplicate_name(const String& path, int duplicate_count)
} }
return duplicated_name.build(); return duplicated_name.build();
} }
} }