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test: reproduce copyfile() off by one regression

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Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This commit is contained in:
Joachim Wiberg
2023-04-08 05:55:39 +02:00
parent 837c3f23be
commit 97cb2cb87c
1 changed files with 27 additions and 4 deletions
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test/copyfile.c
+27 -4
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@@ -2,16 +2,39 @@
#include <errno.h>
#include "check.h"
static int sz()
{
struct stat st;
ssize_t len;
printf("=>Start copyfile(/dev/zero, 32768)\n");
len = copyfile("/dev/zero", "/tmp/zeroes", 32768, 0);
if (!len)
err(1, "failed copying any bytes from /dev/zero");
if (stat("/tmp/zeroes", &st))
err(1, "copied but cannot find destination");
if (st.st_size != 32768)
err(1, "file only %ld bytes, expected 32768", st.st_size);
if (len != st.st_size)
errx(1, "copied correct num bytes, 32768, but copyfile() returns %ld", len);
printf("OK => %ld\n", len);
return 0;
}
int main(void)
{
int i = 0;
char *files[] = {
"/etc/passwd", "/tmp/mypwd", "/tmp/mypwd",
"/etc/passwd", "/tmp/", "/tmp/passwd",
"/etc/passwd", "/tmp", "/tmp/passwd",
"/etc/passwd", "/tmp/", "/tmp/passwd",
"/etc/passwd", "/tmp", "/tmp/passwd",
NULL
};
FILE *src, *dst;
int i = 0;
printf("=>Start testing fcopyfile()\n");
while (files[i]) {
@@ -51,5 +74,5 @@ int main(void)
i += 3;
}
return 0;
return sz();
}