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zdump: stdout_write_dump: if dfo_size() == 0 then don't enter the loop

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While at it, decrease the scope of @cnt and @rc.

Reviewed-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Marc Hartmayer
2021-09-24 08:50:25 +00:00
committed by Jan Höppner
parent 15774dbe32
commit 524017ac06
1 changed files with 6 additions and 4 deletions
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10
zdump/stdout.c
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@@ -17,9 +17,8 @@
int stdout_write_dump(void)
{
const u64 output_size = dfo_size();
u64 cnt, written = 0;
u64 written = 0;
char buf[32768];
ssize_t rc;
if (!dfi_feat_copy())
ERR_EXIT("Copying not possible for %s dumps", dfi_name());
@@ -28,7 +27,10 @@ int stdout_write_dump(void)
STDERR(" Target: %s\n", dfo_name());
STDERR("\n");
zg_progress_init("Copying dump", output_size);
do {
while (written != output_size) {
ssize_t rc;
u64 cnt;
cnt = dfo_read(buf, sizeof(buf));
rc = write(STDOUT_FILENO, buf, cnt);
if (rc == -1)
@@ -37,7 +39,7 @@ int stdout_write_dump(void)
ERR_EXIT("Error: Could not write full block");
written += cnt;
zg_progress(written);
} while (written != output_size);
};
STDERR("\n");
STDERR("Success: Dump has been copied\n");
return 0;