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Userland: Support "cp foo somedirectory"

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Don't overwrite the literal directory inode contents when copying a file
to a directory, duh. :^)
This commit is contained in:
Andreas Kling 2019-03-06 20:22:23 +01:00
parent d75897708b
commit 7d46375690
1 changed files with 37 additions and 6 deletions
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43
Userland/cp.cpp
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@ -3,6 +3,9 @@
#include <assert.h>
#include <stdio.h>
#include <sys/stat.h>
#include <AK/AKString.h>
#include <AK/StringBuilder.h>
#include <AK/FileSystemPath.h>
int main(int argc, char** argv)
{
@ -10,17 +13,14 @@ int main(int argc, char** argv)
printf("usage: cp <source> <destination>\n");
return 0;
}
String src_path = argv[1];
String dst_path = argv[2];
int src_fd = open(argv[1], O_RDONLY);
int src_fd = open(src_path.characters(), O_RDONLY);
if (src_fd < 0) {
perror("open src");
return 1;
}
int dst_fd = open(argv[2], O_WRONLY | O_CREAT);
if (dst_fd < 0) {
perror("open dst");
return 1;
}
struct stat src_stat;
int rc = fstat(src_fd, &src_stat);
@ -29,6 +29,37 @@ int main(int argc, char** argv)
return 1;
}
if (S_ISDIR(src_stat.st_mode)) {
fprintf(stderr, "cp: FIXME: Copying directories is not yet supported\n");
return 1;
}
int dst_fd = open(dst_path.characters(), O_WRONLY | O_CREAT);
if (dst_fd < 0) {
perror("open dst");
return 1;
}
struct stat dst_stat;
rc = fstat(dst_fd, &dst_stat);
if (rc < 0) {
perror("stat dst");
return 1;
}
if (S_ISDIR(dst_stat.st_mode)) {
StringBuilder builder;
builder.append(dst_path);
builder.append('/');
builder.append(FileSystemPath(src_path).basename());
dst_path = builder.to_string();
dst_fd = open(dst_path.characters(), O_WRONLY | O_CREAT);
if (dst_fd < 0) {
perror("open dst");
return 1;
}
}
for (;;) {
char buffer[BUFSIZ];
ssize_t nread = read(src_fd, buffer, sizeof(buffer));