Reported-by: Adhemerval Zanella <adhemerval.zanella@xxxxxxxxxx> Signed-off-by: Alejandro Colomar <alx.manpages@xxxxxxxxx> Cc: libc-alpha@xxxxxxxxxxxxxx Cc: Florian Weimer <fweimer@xxxxxxxxxx> Cc: Michael Kerrisk <mtk.manpages@xxxxxxxxx> --- Hi Adhemerval and Michael, First of all, happy new solar year! :) I added documentation for "%#m". Could you confirm I got the glibc version correct, and also have a look at the changes? Thanks for the report! Cheers, Alex man3/printf.3 | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/man3/printf.3 b/man3/printf.3 index 4fa1f11f3..1e2bac4df 100644 --- a/man3/printf.3 +++ b/man3/printf.3 @@ -301,6 +301,17 @@ and .B G conversions, trailing zeros are not removed from the result as they would otherwise be. +For +.BR m , +if +.I errno +contains a valid error code, +the output of +.I strerrorname_np(errno) +is printed; +otherwise, the value stored in +.I errno +is printed as a decimal number. For other conversions, the result is undefined. .TP .B \&0 @@ -853,7 +864,10 @@ any flags, a field width, or a precision. .B m (Glibc extension; supported by uClibc and musl.) Print output of -.IR strerror(errno) . +.I strerror(errno) +(or +.I strerrorname_np(errno) +in the alternate form). No argument is required. .TP .B % @@ -974,6 +988,13 @@ and conversion characters \fBa\fP and \fBA\fP. .PP glibc 2.2 adds the conversion character \fBF\fP with C99 semantics, and the flag character \fBI\fP. +.PP +glibc 2.35 gives a meaning to the alternate form +.RB ( # ) +of the +.B m +conversion specifier, that is +.IR %#m . .SH NOTES Some programs imprudently rely on code such as the following .PP -- 2.34.1
