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26 lines
908 B
Groff
26 lines
908 B
Groff
4 years ago
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.TH fmt_strm_alloca 3
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.SH NAME
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fmt_strm_alloca \- write multiple ASCII strings
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.SH SYNTAX
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.B #include <libowfat/fmt.h>
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char* \fBfmt_strm_alloca\fP(const char *\fIsource\fR, ...);
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.SH DESCRIPTION
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fmt_strm_alloca copies all leading nonzero bytes from \fIsource\fR and
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following function arguments to a freshly allocated stack buffer and
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returns a pointer to it.
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Unlink fmt_strm, fmt_strm_alloca does append \\0.
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Warning: Using variable size stack buffers is dangerous. If the size of
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the buffer is larger than the hardware page size, then it can be used to
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skip over the guard page and cause memory corruption. fmt_strm_alloca
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has a built-in limit of 100000 bytes. Use this only for trivially small
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strings.
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If the strings do not come from a trusted place or you are not sure they
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are small, prefer fmt_strm_malloc instead.
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.SH "SEE ALSO"
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fmt_str(3), fmt_strm(3), fmt_strm_malloc(3), alloca(3), strcpy(3)
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