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Handle <limits.h> not defining PIPE_BUF.

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According to POSIX, this can legally not be defined 'where the [...]
value is equal to or greater than the stated minimum, but where the
value can vary depending on the file to which it is applied'. So if
limits.h hasn't defined PIPE_BUF, we define it ourself to the stated
minimum, to wit, _POSIX_PIPE_BUF.

Apparently it is actually undefined by <limits.h> on GNU/Hurd: Debian
has been carrying this patch downstream for that reason.
This commit is contained in:
Simon Tatham 2019-03-20 13:09:34 +00:00
parent 582284fa6c
commit f6d1fef2d7
1 changed files with 3 additions and 0 deletions
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3
unix/uxshare.c
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@ -22,6 +22,9 @@
#define CONNSHARE_SOCKETDIR_PREFIX "/tmp/putty-connshare"
#define SALT_FILENAME "salt"
#define SALT_SIZE 64
#ifndef PIPE_BUF
#define PIPE_BUF _POSIX_PIPE_BUF
#endif
static char *make_parentdir_name(void)
{