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Annotation of 43BSDReno/share/doc/smm/12.uchanges/3.t, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1986 Regents of the University of California.
        !             2: .\" All rights reserved.  The Berkeley software License Agreement
        !             3: .\" specifies the terms and conditions for redistribution.
        !             4: .\"
        !             5: .\"    @(#)3.t 6.10 (Berkeley) 4/14/86
        !             6: .\"
        !             7: .SH
        !             8: .LG
        !             9: .ce
        !            10: Section 3
        !            11: .SM
        !            12: .sp
        !            13: .PP
        !            14: The Section 3 documentation has been reorganized into just two sections. 
        !            15: The first section contains everything previously in Section 3
        !            16: except the Fortran library routines.
        !            17: The second section contains the Fortran library routines.
        !            18: .PP
        !            19: The routines \fImemccpy, memchr, memcmp, memcpy, memset, strchr, strcspn,
        !            20: strpbrk, strrchr, strspn,\fP and \fIstrtok\fP have been added for
        !            21: compatibility with System V.
        !            22: These routines are similar to the string and block handling ones
        !            23: described in the
        !            24: .I bstring
        !            25: and
        !            26: .I string
        !            27: manual pages.
        !            28: The 4.3BSD \fIstring\fP and \fIbstring\fP versions should be faster than
        !            29: these compatibility routines on the VAX.
        !            30: .PP
        !            31: .BP abort
        !            32: Sets SIGILL signal action to the default
        !            33: to avoid looping if SIGILL had been ignored or blocked. 
        !            34: .BP ctime
        !            35: Daylight savings time calculations have been fixed for Europe and Canada.
        !            36: Programs making multiple calls to \fIctime\fP will make fewer system calls.
        !            37: The include file has moved from <\fIsys/time.h\fP> to <\fItime.h\fP>.
        !            38: .BP ctype
        !            39: .I iscntrl
        !            40: has been fixed to correspond to the manual page.  Space is a printing
        !            41: character.  \fIisgraph\fP is a new function that
        !            42: returns true for characters that leave a mark on
        !            43: the paper.
        !            44: .I toupper,
        !            45: .I tolower,
        !            46: and
        !            47: .I toascii
        !            48: have all been documented.
        !            49: .BP curses
        !            50: The library handles larger termcap definitions and
        !            51: handles more of the ``funny'' termcap capabilities.
        !            52: The old \fIcrmode\fP and \fInocrmode\fP macros have been
        !            53: renamed \fIcbreak\fP and \fInocbreak\fP respectively;
        !            54: backwards compatible definitions for these macros are provided.
        !            55: The erase and kill characters and the terminal's baudrate
        !            56: may be accessed via \fIerasechar\fP, \fIkillchar\fP,
        !            57: and \fIbaudrate\fP macros defined in <\fIcurses.h\fP>.
        !            58: A \fItouchoverlap\fP function has been provided,
        !            59: and bugs in \fIoverlay\fP and \fIoverwrite\fP have been fixed.
        !            60: .BP dbm
        !            61: Has been rewritten to use the multiple-database version of the
        !            62: library, \fIndbm\fP.
        !            63: .BP disktab
        !            64: Has added support for two new fields indicating the use of
        !            65: \fIbad144\fP-style bad sector forwarding and filesystem offsets
        !            66: specified in sectors.
        !            67: .BP encrypt
        !            68: Now works correctly when called directly.
        !            69: .BP execvp
        !            70: No longer recognizes ``-'' as a path separator.
        !            71: .BP frexp
        !            72: Now handles 0 and powers of 2 correctly.  This routine is now
        !            73: written in assembly language for the VAX.
        !            74: .BP gethost*
        !            75: \fIgethostbyaddr\fP and \fIgethostbyname\fP 
        !            76: have been modified to 
        !            77: make calls to the name server.  If the name server is not running,
        !            78: a linear scan of the host table is made.
        !            79: With an optional C library configuration, these routines may instead
        !            80: use an \fIndbm\fP database for the host table.
        !            81: One of these lookup mechanisms must be specified when compiling
        !            82: the C library.  The default is to use the name server.
        !            83: \fIgethostent\fP has no equivalent when using the routines
        !            84: calling the name server.
        !            85: The \fIhostent\fP structure
        !            86: has been modified to support the return of multiple addresses.
        !            87: The external variable \fIh_errno\fP has been added for returning error
        !            88: status information from the name server,
        !            89: such as whether a transient error was encountered.
        !            90: .BP getopt
        !            91: A new routine for parsing command line arguments.  It is compatible
        !            92: with the System V routine by the same name.
        !            93: .BP getpw*
        !            94: .I getpwnam
        !            95: and
        !            96: .I getpwuid
        !            97: use a hashed database using
        !            98: .I ndbm
        !            99: for faster lookups by user name and id.
        !           100: .BP gettty*
        !           101: .I getttyent
        !           102: and
        !           103: .I getttynam
        !           104: are new routines for looking up entries in the
        !           105: new version of \fI/etc/ttys\fP.
        !           106: The new header file <\fIttyent.h\fP>
        !           107: describes the associated structures.
        !           108: .BP getusershell
        !           109: A new routine for retrieving shell names from a file listing
        !           110: the standard interactive shells, \fI/etc/shells\fP, for the use
        !           111: of
        !           112: .IR passwd (1)
        !           113: and servers providing remote host access.
        !           114: .BP getwd
        !           115: \fIGetwd\fP no longer changes directories in calculating the
        !           116: working directory; this eliminates
        !           117: problems with return to the current directory,
        !           118: and results in fewer \fIstat\fP calls.
        !           119: .BP inet_makeaddr
        !           120: Properly handles INADDR_BROADCAST.
        !           121: .BP longjmp
        !           122: On errors, \fIlongjmp\fP calls the routine \fIlongjmperror\fP.
        !           123: The default routine still prints ``longjmp botch'' and exits;
        !           124: this may be replaced if a program
        !           125: wants to provide its own error handler.
        !           126: .BP malloc
        !           127: \fIMalloc\fP underwent a major rework.
        !           128: Memory requests of page size or larger are always page aligned,
        !           129: and are now optimized for sizes that are a power of two.
        !           130: The debugging code has been improved.
        !           131: .BP math
        !           132: The math library has been rewritten to improve the speed and
        !           133: accuracy of the routines on VAXen with D-format floating
        !           134: point support and machines that conform to the IEEE
        !           135: standard 754 for double precision floating point arithmetic.
        !           136: The library also has improved error detection and handling;
        !           137: for the VAX, the library generates reserved operand faults
        !           138: for invalid operands.
        !           139: Many new functions have been added.
        !           140: Two functions have changed their names;
        !           141: \fIgamma\fP is now \fIlgamma\fP and
        !           142: \fIfmod\fP is now \fImodf\fP.
        !           143: The old math library is available as \-lom.
        !           144: .BP mkstemp
        !           145: Is a new routine similar to
        !           146: .I mktemp
        !           147: except that it returns an open file descriptor for a temporary file.    
        !           148: It is intended to replace \fImktemp\fP in programs (run as root or setuid)
        !           149: that must be concerned with atomic creation of temporary files
        !           150: without the possibility of having the temporary file relocated
        !           151: to an unexpected location by a symbolic link.
        !           152: .BP ndbm
        !           153: A new version of \fIdbm\fP that allows multiple databases to be open 
        !           154: simultaneously.
        !           155: .BP nlist
        !           156: Now returns \-1 on error or the number of unfound items.
        !           157: .BP perror
        !           158: A few of the error messages have been made more accurate.
        !           159: .BP plot
        !           160: Supports many new devices: Tektronix 4013, AED graphics terminal,
        !           161: BBN Bitgraph terminal, terminals using the DEC GiGi protocol,
        !           162: HP 2648 terminals and 7221 plotters,
        !           163: and Imagen laser printers (240 or 300 dots per inch).  Libraries
        !           164: also exist for generating plot files from Fortran programs and
        !           165: for plotting on ``dumb'' devices such as a standard line printer.
        !           166: .BP popen
        !           167: Dynamically allocates an array for file descriptors.
        !           168: The new signal interface is now used.
        !           169: .BP psignal
        !           170: New signals have been added to the list.
        !           171: .BP random
        !           172: An initialization bug that messed up default generation was fixed.
        !           173: .BP rcmd
        !           174: Cleans up properly.
        !           175: A problem with doing multiple calls within one program was fixed.
        !           176: .BP ruserok
        !           177: Now is more flexible about the format of \fI.rhosts\fP.
        !           178: Domain style hostnames do not need full specification
        !           179: if they are a part of the local domain, as determined by \fIhostname\fP\|(1).
        !           180: \fIRuserok\fP is more paranoid about ownership of \fI.rhosts\fP.
        !           181: .BP scandir
        !           182: Handling of overflow has been fixed.
        !           183: .BP setjmp
        !           184: The signal stack status is now set correctly.
        !           185: .BP siginterrupt
        !           186: A new routine to set the signals for which system calls are not restarted after
        !           187: signal delivery.
        !           188: .BP signal
        !           189: Keeps track of new features when changing signal handlers.
        !           190: .BP sleep
        !           191: A couple of races have been fixed.
        !           192: .BP stdio
        !           193: Has been modified to dynamically allocate slots for file pointers.
        !           194: Output on unbuffered files is now buffered within a call
        !           195: to \fIprintf\fP or \fIfputs\fP for efficiency.
        !           196: \fIFseek\fP now returns zero
        !           197: if it was successful.
        !           198: \fIFread\fP and \fIfwrite\fP have been rewritten to improve performance.
        !           199: On the VAX, \fIfgets, gets, fputs\fP and \fIputs\fP
        !           200: were rewritten to take advantage of VAX string instructions
        !           201: and thus improve performance.
        !           202: Line buffering now works on any file descriptor,
        !           203: not just \fIstdout\fP and \fIstderr\fP.
        !           204: \fIPutc\fP is implemented completely within a macro
        !           205: except when the buffer is full
        !           206: or when a newline is output on a line-buffered file.
        !           207: Some sign extension bugs with the return value of \fIputc\fP
        !           208: have been fixed.
        !           209: .BP string
        !           210: The routines \fIindex, rindex, strcat, strcmp, strcpy, strlen,
        !           211: strncat\fP, and \fIstrncpy\fP have been rewritten in VAX assembly language for
        !           212: efficiency.  The C routines are included for use on other machines.
        !           213: Only \fIMakefile\fPs
        !           214: need to be modified to select the version to be used.
        !           215: .BP syslog
        !           216: The third parameter to \fIopenlog\fP
        !           217: is a ``\fIfacility code\fP'' used to classify messages.
        !           218: References to <\fIsyslog.h\fP> should be replaced with references
        !           219: to <\fIsys/syslog.h\fP>.
        !           220: .BP ttyslot
        !           221: Uses the new \fIgetttyent\fP routine.
        !           222: .BP ualarm
        !           223: A simplified interface to \fIsetitimer\fP, similar to \fIalarm\fP
        !           224: but with its argument in microseconds.
        !           225: .BP usleep
        !           226: A new routine which resembles \fIsleep\fP
        !           227: but takes an argument in microseconds.

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