64 lines
1.7 KiB
C
64 lines
1.7 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 <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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// Chop Off Last Component
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static inline void chop_last_component(char **str) {
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size_t length = strlen(*str);
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for (size_t i = 0; i < length; i++) {
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size_t j = length - i - 1;
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if ((*str)[j] == '/') {
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(*str)[j] = '\0';
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break;
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}
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}
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}
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// Get Binary Directory (Remember To Free)
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static inline char *get_binary_directory() {
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// Get Path To Current Executable
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char *exe = realpath("/proc/self/exe", NULL);
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ALLOC_CHECK(exe);
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// Chop Off Last Component
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chop_last_component(&exe);
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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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// Get MCPI Directory
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static inline char *get_mcpi_directory() {
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return getenv("MCPI_DIRECTORY");
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}
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