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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=8 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 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/mem/mem.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/o.h"
static const char *fixpathname(const char *pathname, int flags) {
if ((flags & O_ACCMODE) == O_RDONLY && strcmp(pathname, "-") == 0) {
return "/dev/stdin";
} else if ((flags & O_ACCMODE) == O_WRONLY && strcmp(pathname, "-") == 0) {
return "/dev/stdout";
} else {
return pathname;
}
}
static int openpathname(const char *pathname, int flags, bool *out_noclose) {
if ((flags & O_ACCMODE) == O_RDONLY && strcmp(pathname, "/dev/stdin") == 0) {
*out_noclose = true;
return fileno(stdin);
} else if ((flags & O_ACCMODE) == O_WRONLY &&
strcmp(pathname, "/dev/stdout") == 0) {
*out_noclose = true;
return fileno(stdout);
} else {
*out_noclose = false;
return open(pathname, flags, 0666);
}
}
/**
* Opens file as stream object.
*
* @param pathname is a utf-8 ideally relative filename
* @param mode is the string mode/flag DSL see fopenflags()
* @return new object to be free'd by fclose() or NULL w/ errno
* @note microsoft unilaterally deprecated this function lool
*/
FILE *fopen(const char *pathname, const char *mode) {
FILE *f;
bool noclose;
int fd, flags;
flags = fopenflags(mode);
pathname = fixpathname(pathname, flags);
if ((fd = openpathname(pathname, flags, &noclose)) != -1) {
if ((f = fdopen(fd, mode)) != NULL) {
f->noclose = noclose;
return f;
} else {
if (!noclose) close(fd);
return NULL;
}
} else {
return NULL;
}
}
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