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Add ctermid and L_ctermid

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Justine Tunney 2022-07-22 04:39:04 -07:00
parent 84caee23ba
commit 5a2bb07b36
2 changed files with 49 additions and 0 deletions
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47
libc/stdio/ctermid.c Normal file
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@ -0,0 +1,47 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net 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/nt/pedef.internal.h"
#include "libc/runtime/internal.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
/**
* Generates path of controlling terminal.
*
* This function always returns /dev/tty since that's supported by all
* supported platforms, and polyfilled on Windows.
*
* @param s may optionally specify an outut buffer L_ctermid in size
* @return pointer to `s` (or image memory if `s` was null) which
* contains path of controlling terminal, or empty string if
* if this program is a win32 app running in gui mode
*/
char *ctermid(char *s) {
const char *tty;
if ((char)(intptr_t)v_ntsubsystem == kNtImageSubsystemWindowsGui) {
tty = "";
} else {
tty = "/dev/tty";
}
if (s) {
return strcpy(s, tty);
} else {
return tty;
}
}

2
libc/stdio/stdio.h
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@ -6,6 +6,7 @@
#include "libc/nexgen32e/threaded.h"
#include "libc/runtime/symbolic.h"
#define L_ctermid 20
#define FILENAME_MAX PATH_MAX
#if !(__ASSEMBLER__ + __LINKER__ + 0)
@ -81,6 +82,7 @@ void setbuffer(FILE *, char *, size_t);
int setvbuf(FILE *, char *, int, size_t);
FILE *popen(const char *, const char *);
int pclose(FILE *);
char *ctermid(char *);
typedef uint64_t fpos_t;
compatfn char *gets(char *) paramsnonnull();