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45 lines
1.7 KiB
45 lines
1.7 KiB
1 month ago
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commit 0e16db440cc73d2cdd94e439c0efa1ec43d92b2a
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Author: Florian Weimer <fweimer@redhat.com>
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Date: Tue Aug 13 15:52:34 2024 +0200
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manual: Document generic printf error codes
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Describe EOVERFLOW, ENOMEN, EILSEQ.
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Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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diff --git a/manual/stdio.texi b/manual/stdio.texi
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index 567f6780011f9db1..41298b87a4a6c7d9 100644
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--- a/manual/stdio.texi
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+++ b/manual/stdio.texi
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@@ -2318,6 +2318,29 @@ the easiest way to make sure you have all the right prototypes is to
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just include @file{stdio.h}.
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@pindex stdio.h
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+The @code{printf} family shares the error codes listed below.
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+Individual functions may report additional @code{errno} values if they
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+fail.
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+
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+@table @code
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+@item EOVERFLOW
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+The number of written bytes would have exceeded @code{INT_MAX}, and thus
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+could not be represented in the return type @code{int}.
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+
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+@item ENOMEM
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+The function could not allocate memory during processing. Long argument
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+lists and certain floating point conversions may require memory
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+allocation, as does initialization of an output stream upon first use.
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+
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+@item EILSEQ
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+POSIX specifies this error code should be used if a wide character is
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+encountered that does not have a matching valid character. @Theglibc{}
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+always performs transliteration, using a replacement character if
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+necessary, so this error condition cannot occur on output. However,
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+@theglibc{} uses @code{EILSEQ} to indicate that an input character
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+sequence (wide or multi-byte) could not be converted successfully.
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+@end table
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+
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@deftypefun int printf (const char *@var{template}, @dots{})
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@standards{ISO, stdio.h}
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@safety{@prelim{}@mtsafe{@mtslocale{}}@asunsafe{@asucorrupt{} @ascuheap{}}@acunsafe{@acsmem{} @aculock{} @acucorrupt{}}}
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