mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
b0df6c1fce
Cosmopolitan now supports 104 time zones. They're embedded inside any binary that links the localtime() function. Doing so adds about 100kb to the binary size. This change also gets time zones working properly on Windows for the first time. It's not needed to have /etc/localtime exist on Windows, since we can get this information from WIN32. We're also now updated to the latest version of Paul Eggert's TZ library.
520 lines
13 KiB
C
520 lines
13 KiB
C
/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
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│ vi: set noet ft=c ts=8 sw=8 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright (c) 2010, 2012 David E. O'Brien │
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│ Copyright (c) 1980, 1992, 1993 │
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│ The Regents of the University of California. All rights reserved. │
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│ │
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│ Redistribution and use in source and binary forms, with or without │
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│ modification, are permitted provided that the following conditions │
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│ are met: │
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│ 1. Redistributions of source code must retain the above copyright │
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│ notice, this list of conditions and the following disclaimer. │
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│ 2. Redistributions in binary form must reproduce the above copyright │
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│ notice, this list of conditions and the following disclaimer in the │
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│ documentation and/or other materials provided with the distribution. │
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│ 3. Neither the name of the University nor the names of its contributors │
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│ may be used to endorse or promote products derived from this software │
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│ without specific prior written permission. │
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│ │
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│ THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND │
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│ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE │
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│ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE │
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│ ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE │
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│ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL │
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│ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS │
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│ OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) │
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│ HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT │
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│ LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY │
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│ OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF │
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│ SUCH DAMAGE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/iovec.h"
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#include "libc/calls/struct/stat.h"
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#include "libc/calls/struct/termios.h"
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#include "libc/calls/struct/timeval.h"
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#include "libc/calls/struct/winsize.h"
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#include "libc/calls/termios.h"
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#include "libc/calls/weirdtypes.h"
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#include "libc/errno.h"
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#include "libc/fmt/conv.h"
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#include "libc/intrin/bswap.h"
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#include "libc/log/bsd.h"
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#include "libc/macros.internal.h"
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#include "libc/mem/mem.h"
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#include "libc/paths.h"
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#include "libc/runtime/runtime.h"
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#include "libc/sock/select.h"
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#include "libc/stdio/stdio.h"
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#include "libc/sysv/consts/fileno.h"
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#include "libc/sysv/consts/s.h"
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#include "libc/sysv/consts/termios.h"
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#include "libc/time.h"
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#include "third_party/getopt/getopt.internal.h"
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// clang-format off
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/**
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* @fileoverview Terminal Screencast Recorder / Player, e.g.
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*
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* make o//examples/script.com
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* o//examples/script.com -r
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* # type stuff..
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* # CTRL-D
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* o//examples/script.com -p typescript
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*
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* @note works on Linux, OpenBSD, NetBSD, FreeBSD, MacOS
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* @see https://asciinema.org/
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*/
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__notice(freebsd_script_notice, "\
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FreeBSD Script (BSD-3 License)\n\
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Copyright (c) 2010, 2012 David E. O'Brien\n\
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Copyright (c) 1980, 1992, 1993 The Regents of the University of California");
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#define DEF_BUF 65536
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struct stamp {
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uint64_t scr_len; /* amount of data */
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uint64_t scr_sec; /* time it arrived in seconds... */
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uint32_t scr_usec; /* ...and microseconds */
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uint32_t scr_direction; /* 'i', 'o', etc (also indicates endianness) */
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};
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static FILE *fscript;
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static int master, slave;
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static int child;
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static const char *fname;
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static char *fmfname;
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static int qflg, ttyflg;
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static int usesleep, rawout, showexit;
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static struct termios tt;
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static void done(int) wontreturn;
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static void doshell(char **);
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static void finish(void);
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static void record(FILE *, char *, size_t, int);
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static void consume(FILE *, off_t, char *, int);
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static void playback(FILE *) wontreturn;
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static void usage(void);
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int
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main(int argc, char *argv[])
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{
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int cc;
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struct termios rtt, stt;
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struct winsize win;
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struct timeval tv, *tvp;
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time_t tvec, start;
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static char obuf[BUFSIZ];
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static char ibuf[BUFSIZ];
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fd_set rfd;
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int fm_fd;
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int aflg, Fflg, kflg, pflg, ch, k, n;
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int flushtime, readstdin;
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aflg = Fflg = kflg = pflg = 0;
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usesleep = 1;
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rawout = 0;
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flushtime = 30;
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fm_fd = -1; /* Shut up stupid "may be used uninitialized" GCC
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warning. (not needed w/clang) */
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showexit = 0;
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(void)fm_fd;
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while ((ch = getopt(argc, argv, "adeFfkpqrt:")) != -1)
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switch(ch) {
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case 'a':
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aflg = 1;
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break;
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case 'd':
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usesleep = 0;
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break;
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case 'e': /* Default behavior, accepted for linux compat */
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break;
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case 'F':
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Fflg = 1;
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break;
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case 'k':
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kflg = 1;
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break;
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case 'p':
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pflg = 1;
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break;
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case 'q':
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qflg = 1;
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break;
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case 'r':
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rawout = 1;
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break;
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case 't':
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flushtime = atoi(optarg);
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if (flushtime < 0)
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err(1, "invalid flush time %d", flushtime);
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc > 0) {
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fname = argv[0];
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argv++;
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argc--;
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} else
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fname = "typescript";
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if ((fscript = fopen(fname, pflg ? "r" : aflg ? "a" : "w")) == NULL)
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err(1, "%s", fname);
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if (pflg)
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playback(fscript);
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if (tcgetattr(STDIN_FILENO, &tt) == -1 ||
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tcgetwinsize(STDIN_FILENO, &win) == -1) {
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if (errno != ENOTTY) /* For debugger. */
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err(1, "tcgetattr/ioctl");
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if (openpty(&master, &slave, NULL, NULL, NULL) == -1)
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err(1, "openpty");
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} else {
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if (openpty(&master, &slave, NULL, &tt, &win) == -1)
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err(1, "openpty");
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ttyflg = 1;
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}
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if (rawout)
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record(fscript, NULL, 0, 's');
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if (!qflg) {
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tvec = time(NULL);
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printf("Script started, output file is %s\n", fname);
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if (!rawout) {
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fprintf(fscript, "Script started on %s",
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ctime(&tvec));
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if (argv[0]) {
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showexit = 1;
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fprintf(fscript, "Command: ");
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for (k = 0 ; argv[k] ; ++k)
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fprintf(fscript, "%s%s", k ? " " : "",
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argv[k]);
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fprintf(fscript, "\n");
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}
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}
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fflush(fscript);
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}
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if (ttyflg) {
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rtt = tt;
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cfmakeraw(&rtt);
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rtt.c_lflag &= ~ECHO;
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tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt);
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}
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child = fork();
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if (child < 0) {
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warn("fork");
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done(1);
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}
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if (child == 0) {
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doshell(argv);
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}
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close(slave);
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start = tvec = time(0);
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readstdin = 1;
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for (;;) {
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FD_ZERO(&rfd);
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FD_SET(master, &rfd);
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if (readstdin)
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FD_SET(STDIN_FILENO, &rfd);
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if (!readstdin && ttyflg) {
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tv.tv_sec = 1;
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tv.tv_usec = 0;
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tvp = &tv;
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readstdin = 1;
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} else if (flushtime > 0) {
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tv.tv_sec = flushtime - (tvec - start);
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tv.tv_usec = 0;
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tvp = &tv;
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} else {
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tvp = NULL;
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}
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n = select(master + 1, &rfd, 0, 0, tvp);
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if (n < 0 && errno != EINTR)
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break;
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if (n > 0 && FD_ISSET(STDIN_FILENO, &rfd)) {
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cc = read(STDIN_FILENO, ibuf, BUFSIZ);
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if (cc < 0)
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break;
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if (cc == 0) {
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if (tcgetattr(master, &stt) == 0 &&
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(stt.c_lflag & ICANON) != 0) {
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write(master, &stt.c_cc[VEOF], 1);
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}
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readstdin = 0;
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}
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if (cc > 0) {
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if (rawout)
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record(fscript, ibuf, cc, 'i');
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write(master, ibuf, cc);
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if (kflg && tcgetattr(master, &stt) >= 0 &&
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((stt.c_lflag & ECHO) == 0)) {
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fwrite(ibuf, 1, cc, fscript);
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}
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}
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}
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if (n > 0 && FD_ISSET(master, &rfd)) {
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cc = read(master, obuf, sizeof (obuf));
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if (cc <= 0)
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break;
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write(STDOUT_FILENO, obuf, cc);
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if (rawout)
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record(fscript, obuf, cc, 'o');
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else
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fwrite(obuf, 1, cc, fscript);
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}
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tvec = time(0);
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if (tvec - start >= flushtime) {
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fflush(fscript);
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start = tvec;
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}
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if (Fflg)
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fflush(fscript);
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}
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finish();
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done(0);
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}
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static void
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usage(void)
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{
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fprintf(stderr,
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"usage: script [-adfkpqr] [-t time] [file [command ...]]\n");
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exit(1);
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}
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static void
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finish(void)
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{
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int e, status;
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if (waitpid(child, &status, 0) == child) {
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if (WIFEXITED(status))
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e = WEXITSTATUS(status);
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else if (WIFSIGNALED(status))
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e = WTERMSIG(status);
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else /* can't happen */
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e = 1;
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done(e);
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}
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}
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static void
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doshell(char **av)
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{
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const char *shell;
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shell = getenv("SHELL");
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if (shell == NULL)
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shell = _PATH_BSHELL;
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close(master);
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fclose(fscript);
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free(fmfname);
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login_tty(slave);
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setenv("SCRIPT", fname, 1);
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if (av[0]) {
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execvp(av[0], av);
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warn("%s", av[0]);
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} else {
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execl(shell, shell, "-i", 0);
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warn("%s", shell);
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}
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exit(1);
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}
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static void
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done(int eno)
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{
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time_t tvec;
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if (ttyflg)
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tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt);
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tvec = time(NULL);
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if (rawout)
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record(fscript, NULL, 0, 'e');
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if (!qflg) {
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if (!rawout) {
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if (showexit)
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fprintf(fscript, "\nCommand exit status:"
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" %d", eno);
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fprintf(fscript,"\nScript done on %s",
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ctime(&tvec));
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}
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printf("\nScript done, output file is %s\n", fname);
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}
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fclose(fscript);
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close(master);
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exit(eno);
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}
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static void
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record(FILE *fp, char *buf, size_t cc, int direction)
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{
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struct iovec iov[2];
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struct stamp stamp;
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struct timeval tv;
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gettimeofday(&tv, NULL);
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stamp.scr_len = cc;
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stamp.scr_sec = tv.tv_sec;
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stamp.scr_usec = tv.tv_usec;
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stamp.scr_direction = direction;
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iov[0].iov_len = sizeof(stamp);
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iov[0].iov_base = &stamp;
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iov[1].iov_len = cc;
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iov[1].iov_base = buf;
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if (writev(fileno(fp), &iov[0], 2) == -1)
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err(1, "writev");
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}
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static void
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consume(FILE *fp, off_t len, char *buf, int reg)
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{
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size_t l;
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if (reg) {
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if (fseeko(fp, len, SEEK_CUR) == -1)
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err(1, NULL);
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}
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else {
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while (len > 0) {
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l = MIN(DEF_BUF, len);
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if (fread(buf, sizeof(char), l, fp) != l)
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err(1, "cannot read buffer");
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len -= l;
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}
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}
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}
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#define swapstamp(stamp) do { \
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if (stamp.scr_direction > 0xff) { \
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stamp.scr_len = bswap_64(stamp.scr_len); \
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stamp.scr_sec = bswap_64(stamp.scr_sec); \
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stamp.scr_usec = bswap_32(stamp.scr_usec); \
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stamp.scr_direction = bswap_32(stamp.scr_direction); \
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} \
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} while (0/*CONSTCOND*/)
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static void
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termset(void)
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{
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struct termios traw;
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if (tcgetattr(STDOUT_FILENO, &tt) == -1) {
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if (errno != ENOTTY) /* For debugger. */
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err(1, "tcgetattr");
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return;
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}
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ttyflg = 1;
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traw = tt;
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cfmakeraw(&traw);
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traw.c_lflag |= ISIG;
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tcsetattr(STDOUT_FILENO, TCSANOW, &traw);
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}
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static void
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termreset(void)
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{
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if (ttyflg) {
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tcsetattr(STDOUT_FILENO, TCSADRAIN, &tt);
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ttyflg = 0;
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}
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}
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static void
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playback(FILE *fp)
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{
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struct timespec tsi, tso;
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struct stamp stamp;
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struct stat pst;
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static char buf[DEF_BUF];
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off_t nread, save_len;
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size_t l;
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time_t tclock;
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int reg;
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if (fstat(fileno(fp), &pst) == -1)
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err(1, "fstat failed");
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reg = S_ISREG(pst.st_mode);
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for (nread = 0; !reg || nread < pst.st_size; nread += save_len) {
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if (fread(&stamp, sizeof(stamp), 1, fp) != 1) {
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if (reg)
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err(1, "reading playback header");
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else
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break;
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}
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swapstamp(stamp);
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save_len = sizeof(stamp);
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if (reg && stamp.scr_len >
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(uint64_t)(pst.st_size - save_len) - nread)
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errx(1, "invalid stamp");
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save_len += stamp.scr_len;
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tclock = stamp.scr_sec;
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tso.tv_sec = stamp.scr_sec;
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tso.tv_nsec = stamp.scr_usec * 1000;
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switch (stamp.scr_direction) {
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case 's':
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if (!qflg)
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printf("Script started on %s",
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ctime(&tclock));
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tsi = tso;
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consume(fp, stamp.scr_len, buf, reg);
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termset();
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atexit(termreset);
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break;
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case 'e':
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termreset();
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if (!qflg)
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printf("\nScript done on %s",
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ctime(&tclock));
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consume(fp, stamp.scr_len, buf, reg);
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break;
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case 'i':
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/* throw input away */
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consume(fp, stamp.scr_len, buf, reg);
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break;
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case 'o':
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tsi.tv_sec = tso.tv_sec - tsi.tv_sec;
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tsi.tv_nsec = tso.tv_nsec - tsi.tv_nsec;
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if (tsi.tv_nsec < 0) {
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tsi.tv_sec -= 1;
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tsi.tv_nsec += 1000000000;
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}
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if (usesleep)
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nanosleep(&tsi, NULL);
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tsi = tso;
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while (stamp.scr_len > 0) {
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l = MIN(DEF_BUF, stamp.scr_len);
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if (fread(buf, sizeof(char), l, fp) != l)
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err(1, "cannot read buffer");
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write(STDOUT_FILENO, buf, l);
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|
stamp.scr_len -= l;
|
|
}
|
|
break;
|
|
default:
|
|
errx(1, "invalid direction");
|
|
}
|
|
}
|
|
fclose(fp);
|
|
exit(0);
|
|
}
|