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Improve performance and remove fd leaks

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Justine Tunney 2023-09-10 11:52:03 -07:00
parent 26e254fb4d
commit 1965d7488e
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GPG key ID: BE714B4575D6E328
17 changed files with 131 additions and 159 deletions
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libc/stdio/fleaks.c Normal file
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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=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2023 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/errno.h"
#include "libc/fmt/itoa.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/f.h"
void CheckForFileLeaks(void) {
char msg[512];
char *p = msg;
char *pe = msg + 256;
bool gotsome = false;
for (int fd = 3; fd < 200; ++fd) {
if (fcntl(fd, F_GETFL) != -1) {
if (!gotsome) {
p = stpcpy(p, program_invocation_short_name);
p = stpcpy(p, ": FILE DESCRIPTOR LEAKS:");
gotsome = true;
}
if (p + 1 + 12 + 1 < pe) {
*p++ = ' ';
p = FormatInt32(p, fd);
} else {
break;
}
}
}
if (gotsome) {
char proc[64];
char *p = proc;
*p++ = '\n';
*p = 0;
write(2, msg, p - msg);
p = stpcpy(p, "ls -hal /proc/");
p = FormatInt32(p, getpid());
p = stpcpy(p, "/fd");
system(proc);
exit(1);
}
}