mirror of
https://github.com/yuzu-emu/AppImageKit-checkrt.git
synced 2024-12-12 18:44:18 +01:00
136 lines
3.4 KiB
C
Executable File
136 lines
3.4 KiB
C
Executable File
/* Copyright (c) 2018 Pablo Marcos Oltra <pablo.marcos.oltra@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#define _GNU_SOURCE
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#include "env.h"
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#include "debug.h"
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <errno.h>
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static char** env_allocate(size_t size) {
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return calloc(size + 1, sizeof(char*));
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}
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void env_free(char* const *env) {
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size_t len = 0;
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while (env[len] != 0) {
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free(env[len]);
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len++;
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}
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free((char**)env);
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}
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pid_t get_parent_pid() {
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pid_t ppid = 0;
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char *s_ppid = getenv("PPID");
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if(s_ppid) {
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ppid = atoi(s_ppid);
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}
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if (!ppid) {
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ppid = getppid();
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}
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return ppid;
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}
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static size_t get_number_of_variables(FILE *file, char **buffer, size_t *len) {
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size_t number = 0;
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if (getline(buffer, len, file) < 0)
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return -1;
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char *ptr = *buffer;
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while (ptr < *buffer + *len) {
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size_t var_len = strlen(ptr);
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ptr += var_len + 1;
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if (var_len == 0)
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break;
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number++;
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}
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return number != 0 ? (ssize_t)number : -1;
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}
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static char* const* env_from_buffer(FILE *file) {
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char *buffer = NULL;
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size_t len = 0;
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size_t num_vars = get_number_of_variables(file, &buffer, &len);
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char** env = env_allocate(num_vars);
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size_t n = 0;
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char *ptr = buffer;
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while (ptr < buffer + len && n < num_vars) {
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size_t var_len = strlen(ptr);
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if (var_len == 0)
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break;
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env[n] = calloc(sizeof(char*), var_len + 1);
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strncpy(env[n], ptr, var_len + 1);
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DEBUG("\tenv var copied: %s\n", env[n]);
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ptr += var_len + 1;
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n++;
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}
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free(buffer);
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return env;
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}
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static char* const* read_env_from_process(pid_t pid) {
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char buffer[256] = {0};
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snprintf(buffer, sizeof(buffer), "/proc/%d/environ", pid);
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DEBUG("Reading env from parent process: %s\n", buffer);
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FILE *env_file = fopen(buffer, "r");
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if (!env_file) {
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DEBUG("Error reading file: %s (%s)\n", buffer, strerror(errno));
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return NULL;
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}
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char* const* env = env_from_buffer(env_file);
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fclose(env_file);
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return env;
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}
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char* const* read_parent_env() {
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pid_t ppid = get_parent_pid();
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return read_env_from_process(ppid);
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}
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#ifdef ENV_TEST
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int main() {
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putenv("APPIMAGE_CHECKRT_DEBUG=1");
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DEBUG("ENV TEST\n");
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char **env = NULL;
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read_parent_env(&env);
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return 0;
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}
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#endif
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