Implement cp -f
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parent
c323f6f233
commit
02918a46e8
3
cp.1
3
cp.1
@ -17,6 +17,9 @@ copies a given file, naming it the given name. If multiple files are listed
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they will be copied into the given directory.
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.SH OPTIONS
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.TP
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.B \-f
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if an existing destination file cannot be opened, remove it and try again.
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.TP
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.B \-R
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equivalent to -r.
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.TP
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5
cp.c
5
cp.c
@ -8,7 +8,7 @@
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static void
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usage(void)
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{
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eprintf("usage: %s [-Rr] source... dest\n", argv0);
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eprintf("usage: %s [-fRr] source... dest\n", argv0);
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}
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int
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@ -17,6 +17,9 @@ main(int argc, char *argv[])
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struct stat st;
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ARGBEGIN {
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case 'f':
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cp_fflag = true;
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break;
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case 'R':
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case 'r':
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cp_rflag = true;
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1
fs.h
1
fs.h
@ -1,6 +1,7 @@
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/* See LICENSE file for copyright and license details. */
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#include <stdbool.h>
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extern bool cp_fflag;
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extern bool cp_rflag;
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extern bool rm_fflag;
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extern bool rm_rflag;
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@ -12,6 +12,7 @@
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#include "../text.h"
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#include "../util.h"
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bool cp_fflag = false;
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bool cp_rflag = false;
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int
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@ -62,8 +63,12 @@ cp(const char *s1, const char *s2)
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if(!(f1 = fopen(s1, "r")))
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eprintf("fopen %s:", s1);
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if(!(f2 = fopen(s2, "w")))
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if(!(f2 = fopen(s2, "w"))) {
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if (cp_fflag == true)
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unlink(s2);
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if (!(f2 = fopen(s2, "w")))
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eprintf("fopen %s:", s2);
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}
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concat(f1, s1, f2, s2);
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fchmod(fileno(f2), st.st_mode);
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@ -18,4 +18,3 @@ fnck(const char *a, const char *b, int (*fn)(const char *, const char *))
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if(fn(a, b) == -1)
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eprintf("%s -> %s:", a, b);
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}
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