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o escape From line with a leading '>' when needed
o only print To: address and Subject lines if actually present
o new variable 'allnet' to treat user@foo and user@bar as the same "user"
o folders command now takes an optional argument like ls.
o new "pipe" (|) command to pipe the message through an arbitrary command
o make header display format the same as SunOS 4.1.3 /usr/ucb/mail
o tilde commands work regardless of interactive mode.
o fix "read: Interrupted system call" error by retrying if EINTR
o expanded help file
Changes by me:
o read the help file via the PAGER as it is now more than 24 lines long
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constant). These are not security holes but it is worth fixing
them anyway both for robustness and so folks looking for examples
in the tree are not misled into doing something potentially dangerous.
Furthermore, it is a bad idea to assume that pathnames will not
include '%' in them and that error routines don't return strings
with '%' in them (especially in light of the possibility of locales).
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This prevents someone from sneaking arbitrary args to sendmail via
the Reply-To: or From: lines.
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replace panic() with calls to err()/errx()
use S_IS* instead of doing by hand with S_IF*.
Use TIMESPEC_TO_TIMEVAL() and gettimeofday instead of time(2)
Use _POSIX_VDISABLE, not 0
Kill register
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Use sigsetjmp/siglongjmp instead of sigjmp/longjmp for portability.
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- handle long lines safely (from NetBSD)
- use puts/fputs and putchar/putc when it makes sense
- use err/errx and warn/warnx when it makes sense
- make return() and sizeof() style consisten
- some more buffer safety
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- Fix PR/105: Implement dot locking protocol and check return value of flock.
- Fix PR/2247: Don't call unknown users "ubluit". Issue an error message.
- Fix/add prototypes.
- Fix warnings.
- Use POSIX signal mask calls.
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