72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
#pragma once
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#include <unistd.h>
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#include <stdint.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <limits.h>
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#include <string.h>
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#include "log.h"
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#include "string.h"
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#include "util.h"
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// Safe execvpe()
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__attribute__((noreturn)) static inline void safe_execvpe(const char *pathname, char *argv[], char *const envp[]) {
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argv[0] = (char *) pathname;
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int ret = execvpe(pathname, argv, envp);
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if (ret == -1) {
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ERR("Unable To Execute Program: %s: %s", pathname, strerror(errno));
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} else {
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ERR("%s", "Unknown execvpe() Error");
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}
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}
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// Get Binary Directory (Remember To Free)
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#define EXE_PATH "/proc/self/exe"
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static inline char *get_binary_directory() {
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// Get Path To Current Executable
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// Get Symlink Path Size
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struct stat sb;
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if (lstat(EXE_PATH, &sb) == -1) {
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ERR("Unable To Get " EXE_PATH " Symlink Size: %s", strerror(errno));
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}
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ssize_t path_size = sb.st_size + 1;
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if (sb.st_size == 0) {
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path_size = PATH_MAX;
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}
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char *exe = (char *) malloc(path_size);
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ALLOC_CHECK(exe);
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// Read Link
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ssize_t r = readlink(EXE_PATH, exe, path_size);
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if (r < 0) {
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ERR("Unable To Read " EXE_PATH " Symlink: %s", strerror(errno));
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}
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if (r > path_size) {
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ERR("%s", "Size Of Symlink " EXE_PATH " Changed");
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}
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exe[path_size] = '\0';
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// Chop Off Last Component
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for (int i = path_size - 1; i >= 0; i--) {
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if (exe[i] == '/') {
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exe[i] = '\0';
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break;
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}
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}
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// Return
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return exe;
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}
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// Safe execvpe() Relative To Binary
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__attribute__((noreturn)) static inline void safe_execvpe_relative_to_binary(const char *pathname, char *argv[], char *const envp[]) {
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// Get Binary Directory
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char *binary_directory = get_binary_directory();
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// Create Full Path
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char *full_path = NULL;
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safe_asprintf(&full_path, "%s/%s", binary_directory, pathname);
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// Free Binary Directory
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free(binary_directory);
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// Run
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safe_execvpe(full_path, argv, envp);
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}
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