ERR_ASPRINTF_ERROR_DATA(3) | Library Functions Manual | ERR_ASPRINTF_ERROR_DATA(3)

# NAME

`ERR_asprintf_error_data` — record a LibreSSL error using a formatted string

# SYNOPSIS

library “libcrypto”
`#include <openssl/err.h>`

void
`ERR_asprintf_error_data`(char * format, ...);

# DESCRIPTION

`ERR_asprintf_error_data` builds a string using asprintf(3) called with the provided format and arguments. The resulting string is then associated with the error code that was most recently added. If asprintf(3) fails, the string "malloc failed" is associated instead.

`ERR_asprintf_error_data` is intended to be used instead of the OpenSSL functions `ERR_add_error_data`() and `ERR_add_error_vdata`().

# SEE ALSO

ERR(3), ERR_put_error(3), printf(3)

# HISTORY

`ERR_asprintf_error_data` appeared in OpenBSD 5.6 and is available in all versions of LibreSSL.

June 8, 2025 | Debian