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Add -f to cp(1).

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This commit is contained in:
Jonas 'Sortie' Termansen 2016-02-01 01:45:12 +01:00
parent bd14553a0f
commit b37a679c72
1 changed files with 22 additions and 7 deletions
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29
utils/cp.cpp
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@ -1,6 +1,6 @@
/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013, 2014.
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013, 2014, 2016.
This program is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
@ -59,11 +59,12 @@ char* AddElemToPath(const char* path, const char* elem)
return ret;
}
const int FLAG_RECURSIVE = 1 << 0;
const int FLAG_VERBOSE = 1 << 1;
const int FLAG_TARGET_DIR = 1 << 2;
const int FLAG_NO_TARGET_DIR = 1 << 3;
const int FLAG_UPDATE = 1 << 4;
static const int FLAG_RECURSIVE = 1 << 0;
static const int FLAG_VERBOSE = 1 << 1;
static const int FLAG_TARGET_DIR = 1 << 2;
static const int FLAG_NO_TARGET_DIR = 1 << 3;
static const int FLAG_UPDATE = 1 << 4;
static const int FLAG_FORCE = 1 << 5;
enum symbolic_dereference
{
@ -359,7 +360,20 @@ bool CopyToDest(int srcdirfd, const char* srcrel, const char* srcpath,
}
}
int dstfd = openat(dstdirfd, dstrel, O_WRONLY | O_CREAT, srcst.st_mode & 03777);
int oflags = O_WRONLY | O_CREAT;
mode_t omode = srcst.st_mode & 03777;
int dstfd = openat(dstdirfd, dstrel, oflags, omode);
if ( dstfd < 0 &&
(flags & FLAG_FORCE) &&
faccessat(dstdirfd, dstrel, F_OK, AT_SYMLINK_NOFOLLOW) == 0 )
{
if ( unlinkat(dstdirfd, dstrel, 0) < 0 )
{
error(0, errno, "%s", dstpath);
return close(srcfd), false;
}
dstfd = openat(dstdirfd, dstrel, oflags, omode);
}
if ( dstfd < 0 )
{
error(0, errno, "%s", dstpath);
@ -477,6 +491,7 @@ int main(int argc, char* argv[])
case 'o': if ( *(arg + 1) ) arg = "o"; else if ( i + 1 != argc ) argv[++i] = NULL; break;
case 's': /* ignored */ break;
#endif
case 'f': flags |= FLAG_FORCE; break;
case 'H': symbolic_dereference = SYMBOLIC_DEREFERENCE_ARGUMENTS; break;
case 'L': symbolic_dereference = SYMBOLIC_DEREFERENCE_ALWAYS; break;
case 'r':