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main: fix copy loop

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fix potential infinite loop on a short read.

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
This commit is contained in:
Giuseppe Scrivano 2020-04-30 11:09:09 +02:00
parent 9b687001bb
commit f6262ed778
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GPG Key ID: E4730F97F60286ED
1 changed files with 8 additions and 6 deletions
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main.c
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@ -2557,11 +2557,13 @@ copy_fd_to_fd (int sfd, int dfd, char *buf, size_t buf_size)
break; break;
written = 0; written = 0;
do
{ {
ret = TEMP_FAILURE_RETRY (write (dfd, buf + written, nread)); ret = TEMP_FAILURE_RETRY (write (dfd, buf + written, nread));
if (ret < 0) if (ret < 0)
return ret; return ret;
nread -= ret; nread -= ret;
written += ret;
} }
while (nread); while (nread);
} }