52 lines
962 B
C
52 lines
962 B
C
// SPDX-FileCopyrightText: 2024-2025, Alejandro Colomar <alx@kernel.org>
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// SPDX-License-Identifier: BSD-3-Clause
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#ifndef SHADOW_INCLUDE_LIB_FS_READLINK_READLINKNUL_H_
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#define SHADOW_INCLUDE_LIB_FS_READLINK_READLINKNUL_H_
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#include "config.h"
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#include <errno.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "attr.h"
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#include "sizeof.h"
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// readlinknul_a - read link nul-terminate array
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#define readlinknul_a(link, buf) readlinknul(link, buf, countof(buf))
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ATTR_STRING(1)
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inline ssize_t readlinknul(const char *restrict link, char *restrict buf,
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ssize_t size);
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// readlinknul - read link nul-terminate
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inline ssize_t
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readlinknul(const char *restrict link, char *restrict buf, ssize_t size)
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{
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ssize_t len;
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len = readlink(link, buf, size);
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if (len == -1)
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return -1;
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if (len == size) {
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stpcpy(&buf[size-1], "");
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errno = E2BIG;
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return -1;
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}
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stpcpy(&buf[len], "");
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return len;
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}
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#endif // include guard
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