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string: Add sigabbrev_np and sigdescr_np

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The sigabbrev_np returns the abbreviated signal name (e.g. "HUP" for
SIGHUP) while sigdescr_np returns the string describing the error
number (e.g "Hangup" for SIGHUP).  Different than strsignal,
sigdescr_np does not attempt to translate the return description and
both functions return NULL for an invalid signal number.

They should be used instead of sys_siglist or sys_sigabbrev and they
are both thread and async-signal safe.  They are added as GNU
extensions on string.h header (same as strsignal).

Checked on x86-64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu,
and s390x-linux-gnu.

Tested-by: Carlos O'Donell <carlos@redhat.com>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Adhemerval Zanella
2020-05-18 17:05:05 -03:00
parent 4f92497488
commit bfe05aa289
43 changed files with 236 additions and 10 deletions
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8
string/string.h
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@ -454,6 +454,14 @@ extern char *strsep (char **__restrict __stringp,
/* Return a string describing the meaning of the signal number in SIG. */
extern char *strsignal (int __sig) __THROW;
# ifdef __USE_GNU
/* Return an abbreviation string for the signal number SIG. */
extern const char *sigabbrev_np (int __sig) __THROW;
/* Return a string describing the meaning of the signal number in SIG,
the result is not translated. */
extern const char *sigdescr_np (int __sig) __THROW;
# endif
/* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */
extern char *__stpcpy (char *__restrict __dest, const char *__restrict __src)
__THROW __nonnull ((1, 2));