158 lines
3.1 KiB
C
158 lines
3.1 KiB
C
#include "util.h"
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#include "config.h"
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#include "log.h"
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#include <openssl/md5.h>
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#include <uuid/uuid.h>
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#include <errno.h>
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#include <execinfo.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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/**
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* \brief Backtrace buffer size
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*/
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#define BT_BUF_SIZE 100
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/**
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* \brief The length of a MD5SUM string
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*/
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#define MD5_HASH_LEN 32
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/**
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* \brief The length of the salt
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* \details This is basically the length of a UUID
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*/
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#define SALT_LEN 36
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char *path_append(const char *path, const char *filename)
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{
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int needs_separator = 0;
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if ((path[strnlen(path, MAX_PATH_LEN) - 1] != '/')
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&& (filename[0] != '/')) {
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needs_separator = 1;
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}
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char *str;
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size_t ul = strnlen(path, MAX_PATH_LEN);
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size_t sl = strnlen(filename, MAX_FILENAME_LEN);
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str = CALLOC(ul + sl + needs_separator + 1, sizeof(char));
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strncpy(str, path, ul);
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if (needs_separator) {
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str[ul] = '/';
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}
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strncat(str, filename, sl);
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return str;
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}
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int64_t round_div(int64_t a, int64_t b)
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{
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return (a + (b / 2)) / b;
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}
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void PTHREAD_MUTEX_UNLOCK(pthread_mutex_t *x)
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{
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int i;
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i = pthread_mutex_unlock(x);
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if (i) {
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lprintf(fatal,
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"thread %x: %d, %s\n", pthread_self(), i, strerror(i));
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}
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}
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void PTHREAD_MUTEX_LOCK(pthread_mutex_t *x)
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{
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int i;
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i = pthread_mutex_lock(x);
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if (i) {
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lprintf(fatal,
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"thread %x: %d, %s\n", pthread_self(), i, strerror(i));
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}
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}
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void exit_failure(void)
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{
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int nptrs;
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void *buffer[BT_BUF_SIZE];
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nptrs = backtrace(buffer, BT_BUF_SIZE);
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fprintf(stderr, "\nOops! HTTPDirFS crashed! :(\n");
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fprintf(stderr, "backtrace() returned the following %d addresses:\n",
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nptrs);
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backtrace_symbols_fd(buffer, nptrs, STDERR_FILENO);
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exit(EXIT_FAILURE);
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}
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void erase_string(FILE *file, size_t max_len, char *s)
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{
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size_t l = strnlen(s, max_len);
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for (size_t k = 0; k < l; k++) {
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fprintf(file, "\b");
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}
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for (size_t k = 0; k < l; k++) {
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fprintf(file, " ");
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}
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for (size_t k = 0; k < l; k++) {
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fprintf(file, "\b");
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}
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}
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char *generate_salt(void)
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{
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char *out;
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out = CALLOC(SALT_LEN + 1, sizeof(char));
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uuid_t uu;
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uuid_generate(uu);
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uuid_unparse(uu, out);
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return out;
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}
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char *generate_md5sum(const char *str)
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{
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MD5_CTX c;
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unsigned char md5[MD5_DIGEST_LENGTH];
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size_t len = strnlen(str, MAX_PATH_LEN);
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char *out = CALLOC(MD5_HASH_LEN + 1, sizeof(char));
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MD5_Init(&c);
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MD5_Update(&c, str, len);
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MD5_Final(md5, &c);
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for (int i = 0; i < MD5_DIGEST_LENGTH; i++) {
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sprintf(out + 2 * i, "%02x", md5[i]);
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}
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return out;
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}
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void *CALLOC(size_t nmemb, size_t size)
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{
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void *ptr = calloc(nmemb, size);
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if (!ptr) {
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lprintf(fatal, "%s!\n", strerror(errno));
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}
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return ptr;
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}
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void FREE(void *ptr)
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{
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if (ptr) {
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free(ptr);
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} else {
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lprintf(fatal, "attempted to free NULL ptr!\n");
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}
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}
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char *str_to_hex(char *s)
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{
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char *hex = CALLOC(strnlen(s, MAX_PATH_LEN) * 2 + 1, sizeof(char));
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for (char *c = s, *h = hex; *c; c++, h += 2) {
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sprintf(h, "%x", *c);
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}
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return hex;
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}
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