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Various paginate improvements (#1148)

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* start on improving __paginate

* make __paginate more robust

* add __paginate_file

* cleanup __paginate unlinking
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Gavin Hayes 2024-04-26 23:12:25 -04:00 • committed by GitHub
parent 69db501c68
commit 2bfd6b37c1
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2 changed files with 68 additions and 16 deletions
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58
libc/proc/paginate.c
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@ -1,58 +0,0 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/intrin/safemacros.internal.h"
#include "libc/limits.h"
#include "libc/runtime/runtime.h"
#include "libc/str/str.h"
#include "libc/temp.h"
/**
* Displays wall of text in terminal with pagination.
*/
void __paginate(int fd, const char *s) {
int tfd, pid;
char *args[3] = {0};
char tmppath[] = "/tmp/paginate.XXXXXX";
char progpath[PATH_MAX];
if (strcmp(nulltoempty(getenv("TERM")), "dumb") && isatty(0) && isatty(1) &&
((args[0] = commandv("less", progpath, sizeof(progpath))) ||
(args[0] = commandv("more", progpath, sizeof(progpath))) ||
(args[0] = commandv("more.exe", progpath, sizeof(progpath))))) {
if ((tfd = mkstemp(tmppath)) != -1) {
write(tfd, s, strlen(s));
close(tfd);
args[1] = tmppath;
if ((pid = fork()) != -1) {
putenv("LC_ALL=C.UTF-8");
putenv("LESSCHARSET=utf-8");
putenv("LESS=-RS");
if (!pid) {
execv(args[0], args);
_Exit(127);
}
waitpid(pid, 0, 0);
unlink(tmppath);
return;
}
unlink(tmppath);
}
}
write(fd, s, strlen(s));
}