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| author | Dmitry V. Levin <ldv@altlinux.org> | 2018-06-26 22:45:01 +0000 |
|---|---|---|
| committer | Björn Esser <besser82@fedoraproject.org> | 2018-07-13 11:35:21 +0200 |
| commit | 59680ceac13f85a1506fca87255ea47304a8e493 (patch) | |
| tree | 9e498061f0034aed2a4a631cc3e64978fe7d8ac6 /crypt_gensalt.3 | |
| parent | b3ee64bf08082367ea2116ea1fb2007e1a2896cd (diff) | |
| download | libxcrypt-59680ceac13f85a1506fca87255ea47304a8e493.tar.gz libxcrypt-59680ceac13f85a1506fca87255ea47304a8e493.tar.bz2 libxcrypt-59680ceac13f85a1506fca87255ea47304a8e493.zip | |
crypt.h: introduce CRYPT_GENSALT_IMPLEMENTS_* feature test macros
Define CRYPT_GENSALT_IMPLEMENTS_DEFAULT_PREFIX and
CRYPT_GENSALT_IMPLEMENTS_AUTO_ENTROPY feature test macros.
These macros could be checked by portable users of crypt_gensalt*
functions to find out whether null pointers could be specified
as PREFIX and RBYTES arguments.
Diffstat (limited to 'crypt_gensalt.3')
| -rw-r--r-- | crypt_gensalt.3 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/crypt_gensalt.3 b/crypt_gensalt.3 index 8759011..ebfff28 100644 --- a/crypt_gensalt.3 +++ b/crypt_gensalt.3 @@ -172,6 +172,19 @@ failed to allocate memory for the compiled string. .ad b .hy 1 +.SH FEATURE TEST MACROS +The following macros are defined by +.BR crypt.h : +.TP +.B CRYPT_GENSALT_IMPLEMENTS_DEFAULT_PREFIX +A null pointer can be specified as +.I prefix +argument. +.TP +.B CRYPT_GENSALT_IMPLEMENTS_AUTO_ENTROPY +A null pointer can be specified as +.I rbytes +argument. .SH PORTABILITY NOTES The functions .BR crypt_gensalt ", " crypt_gensalt_rn ", and " crypt_gensalt_ra @@ -181,6 +194,14 @@ A function with the name .B crypt_gensalt also exists on Solaris 10 and newer, but its prototype and semantics differ. .PP +The default prefix and auto entropy features are available since libxcrypt +version 4.0.0. Portable software can use feature test macros to find out +whether null pointers could be specified as +.I prefix +and +.I rbytes +arguments. +.PP The set of supported hashing methods varies considerably from system to system. .SH ATTRIBUTES |