cosmopolitan/examples/cp.c

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#if 0
/*─────────────────────────────────────────────────────────────────╗
To the extent possible under law, Justine Tunney has waived
all copyright and related or neighboring rights to this file,
as it is written in the following disclaimers:
http://unlicense.org/ │
http://creativecommons.org/publicdomain/zero/1.0/ │
*/
#endif
#include "libc/calls/calls.h"
#include "libc/calls/hefty/copyfile.h"
#include "libc/conv/conv.h"
#include "libc/errno.h"
#include "libc/fmt/fmt.h"
#include "libc/runtime/gc.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/ex.h"
#include "libc/sysv/consts/exit.h"
#include "libc/sysv/consts/ok.h"
#include "libc/x/x.h"
#include "third_party/getopt/getopt.h"
#define USAGE \
" SRC... DST\n\
\n\
SYNOPSIS\n\
\n\
Copies Files\n\
\n\
FLAGS\n\
\n\
-?\n\
-h help\n\
-f force\n\
-n no clobber\n\
-a preserve all\n\
-p preserve owner and timestamps\n\
\n"
int flags;
bool force;
noreturn void PrintUsage(int rc, FILE *f) {
fprintf(f, "%s%s%s", "Usage: ", program_invocation_name, USAGE);
exit(rc);
}
void GetOpts(int argc, char *argv[]) {
int opt;
while ((opt = getopt(argc, argv, "?hfnap")) != -1) {
switch (opt) {
case 'f':
force = true;
break;
case 'n':
flags |= COPYFILE_NOCLOBBER;
break;
case 'a':
case 'p':
flags |= COPYFILE_PRESERVE_OWNER;
flags |= COPYFILE_PRESERVE_TIMESTAMPS;
break;
case 'h':
case '?':
PrintUsage(EXIT_SUCCESS, stdout);
default:
PrintUsage(EX_USAGE, stderr);
}
}
}
int cp(const char *src, const char *dst) {
if (endswith(dst, "/") || isdirectory(dst)) {
dst = gc(xasprintf("%s/%s", dst, basename));
}
if (!force && access(dst, W_OK) == -1 && errno != ENOENT) goto OnFail;
if (copyfile(src, dst, flags) == -1) goto OnFail;
return 0;
OnFail:
fprintf(stderr, "%s %s %s: %s\n", "error: cp", src, dst, strerror(errno));
return 1;
}
int main(int argc, char *argv[]) {
int i;
GetOpts(argc, argv);
if (argc - optind < 2) PrintUsage(EX_USAGE, stderr);
for (i = optind; i < argc - 1; ++i) {
if (cp(argv[i], argv[argc - 1]) == -1) {
return -1;
}
}
return 0;
}