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Implement cp -f

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This commit is contained in:
sin 2014-05-05 14:58:14 +01:00
parent c323f6f233
commit 02918a46e8
5 changed files with 15 additions and 4 deletions
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3
cp.1
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@ -17,6 +17,9 @@ copies a given file, naming it the given name. If multiple files are listed
they will be copied into the given directory.
.SH OPTIONS
.TP
.B \-f
if an existing destination file cannot be opened, remove it and try again.
.TP
.B \-R
equivalent to -r.
.TP

5
cp.c
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@ -8,7 +8,7 @@
static void
usage(void)
{
eprintf("usage: %s [-Rr] source... dest\n", argv0);
eprintf("usage: %s [-fRr] source... dest\n", argv0);
}
int
@ -17,6 +17,9 @@ main(int argc, char *argv[])
struct stat st;
ARGBEGIN {
case 'f':
cp_fflag = true;
break;
case 'R':
case 'r':
cp_rflag = true;

1
fs.h
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@ -1,6 +1,7 @@
/* See LICENSE file for copyright and license details. */
#include <stdbool.h>
extern bool cp_fflag;
extern bool cp_rflag;
extern bool rm_fflag;
extern bool rm_rflag;

7
util/cp.c
View File

@ -12,6 +12,7 @@
#include "../text.h"
#include "../util.h"
bool cp_fflag = false;
bool cp_rflag = false;
int
@ -62,8 +63,12 @@ cp(const char *s1, const char *s2)
if(!(f1 = fopen(s1, "r")))
eprintf("fopen %s:", s1);
if(!(f2 = fopen(s2, "w")))
if(!(f2 = fopen(s2, "w"))) {
if (cp_fflag == true)
unlink(s2);
if (!(f2 = fopen(s2, "w")))
eprintf("fopen %s:", s2);
}
concat(f1, s1, f2, s2);
fchmod(fileno(f2), st.st_mode);

1
util/fnck.c
View File

@ -18,4 +18,3 @@ fnck(const char *a, const char *b, int (*fn)(const char *, const char *))
if(fn(a, b) == -1)
eprintf("%s -> %s:", a, b);
}