mirror of
https://github.com/jart/cosmopolitan.git
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86 lines
3.6 KiB
C
86 lines
3.6 KiB
C
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/errno.h"
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#include "libc/fmt/fmt.h"
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#include "libc/mem/mem.h"
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#include "libc/stdio/spawn.h"
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#include "libc/str/str.h"
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/**
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* Creates object with no actions.
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*/
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int posix_spawn_file_actions_init(posix_spawn_file_actions_t *file_actions) {
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*file_actions = malloc(sizeof(char));
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if (!*file_actions) return ENOMEM;
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strcpy(*file_actions, "");
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return 0;
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}
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/**
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* Frees object storage and make invalid.
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*/
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int posix_spawn_file_actions_destroy(posix_spawn_file_actions_t *file_actions) {
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free(*file_actions);
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*file_actions = NULL;
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return 0;
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}
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/**
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* Adds new action string to object.
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*/
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static int add_to_file_actions(posix_spawn_file_actions_t *file_actions,
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char *new_action) {
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*file_actions =
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realloc(*file_actions, strlen(*file_actions) + strlen(new_action) + 1);
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if (!*file_actions) return ENOMEM;
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strcat(*file_actions, new_action);
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return 0;
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}
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/**
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* Add a close action to object.
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*/
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int posix_spawn_file_actions_addclose(posix_spawn_file_actions_t *file_actions,
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int fildes) {
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char temp[100];
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sprintf(temp, "close(%d)", fildes);
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return add_to_file_actions(file_actions, temp);
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}
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/**
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* Add a dup2 action to object.
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*/
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int posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *file_actions,
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int fildes, int newfildes) {
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char temp[100];
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sprintf(temp, "dup2(%d,%d)", fildes, newfildes);
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return add_to_file_actions(file_actions, temp);
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}
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/**
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* Add an open action to object.
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*/
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int posix_spawn_file_actions_addopen(posix_spawn_file_actions_t *file_actions,
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int fildes, const char *path, int oflag,
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unsigned mode) {
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char temp[100];
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sprintf(temp, "open(%d,%s*%o,%o)", fildes, path, oflag, mode);
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return add_to_file_actions(file_actions, temp);
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}
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