54 lines
897 B
C
54 lines
897 B
C
// SPDX-FileCopyrightText: 2024, 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_AREADLINK_H_
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#define SHADOW_INCLUDE_LIB_FS_READLINK_AREADLINK_H_
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#include "config.h"
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#include <errno.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include "defines.h"
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#include "alloc/malloc.h"
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#include "attr.h"
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#include "fs/readlink/readlinknul.h"
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ATTR_STRING(1)
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inline char *areadlink(const char *link);
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// Similar to readlink(2), but allocate and terminate the string.
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inline char *
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areadlink(const char *link)
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{
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size_t size = PATH_MAX;
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while (true) {
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int len;
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char *buf;
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buf = malloc_T(size, char);
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if (NULL == buf)
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return NULL;
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len = readlinknul(link, buf, size);
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if (len != -1)
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return buf;
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free(buf);
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if (errno != E2BIG)
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return NULL;
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size *= 2;
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}
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}
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#endif // include guard
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