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/* ckutil.c - utility functions for ck ---------------------------------*- C -*-
*
* This file is part of ck, the config keeper
*
* -----------------------------------------------------------------------------
*
* Copyright (C) 2018 Anastasis Grammenos
* GPLv3 (see LICENCE for the full notice)
*
* -------------------------------------------------------------------------- */
#include <ctype.h>
#include <dirent.h>
#include <fcntl.h>
#include <libgen.h>
#include <sys/sendfile.h>
#include <sys/stat.h>
#include <unistd.h>
#include "ckutil.h"
#include "ckerrlog.h"
ERRLOG(utility);
int util_is_dir(const char *path) {
if (!path) {
return 0;
}
DIR *dir;
dir = opendir(path);
if (!dir) {
return 0;
}
closedir(dir);
return 1;
}
void util_replace_slash_with_uscore(char *s) {
if (!s) {
return;
}
int i = 0;
while (*s != '\0') {
if (*s == '/' && i != 0) {
*s = '_';
}
s++;
i++;
}
}
int util_file_exists(const char* path, char *absPath) {
if (!path || !absPath) {
return 0;
}
struct stat st = {0};
if (stat(path, &st) == -1) {
return 0;
}
if (absPath) {
realpath(path, absPath);
}
return 1;
}
int util_is_file_rw(const char *path) {
if (!path) {
return 0;
}
if (access(path, R_OK | W_OK) == 0) {
return 1;
}
return 0;
}
int util_is_file_link(const char *path) {
if (!path) {
return 0;
}
struct stat buf;
lstat(path, &buf);
if (S_ISLNK(buf.st_mode)) {
return 0;
}
return 1;
}
void util_mkdir(const char *name) {
if (!name) {
return;
}
mkdir(name, 0755);
}
int util_move_file(const char *path, const char* dest) {
if (!path || !dest) {
return 0;
}
int srcFile = open(path, O_RDONLY);
int destFile = open(dest, O_WRONLY | O_CREAT);
struct stat st, newSt;
fstat(srcFile, &st);
sendfile(destFile, srcFile, NULL, (size_t)st.st_size);
close(srcFile);
fchmod(destFile, st.st_mode);
fstat(destFile, &newSt);
if (st.st_size == newSt.st_size) {
unlink(path);
close(destFile);
return 0;
}
close(destFile);
return -1;
}
int util_symlink_file(const char *path, const char* dest) {
if (!path || !dest) {
return -1;
}
return symlink(path, dest);
}
void str_make_ck_config_name(char *ret, const char *path,
const char *progName) {
if (!path || !ret || !progName) {
return;
}
char *basec = strdup(path);
char *bname = basename(basec);
str_join_dirname_with_basename(ret, progName, bname);
free(basec);
}
void str_join_dirname_with_basename(char *ret, const char *dirname,
const char *basename) {
if (!dirname || !ret || !basename) {
return;
}
strcpy(ret, dirname);
strcat(ret, "/");
strcat(ret, basename);
}
int str_is_empty(const char *s) {
if (!s) {
return 1;
}
while (*s != '\0') {
if (!isspace((unsigned char)*s)) {
return 0;
}
s++;
}
return 1;
}
int util_own_grp_copy(const char *dest, const char *original) {
if (!dest || !original) {
return -1;
}
struct stat destbuf, origbuf;
if (lstat(dest, &destbuf)) {
sERR("error stating %s", dest)
return -1;
}
if (stat(original, &origbuf)) {
sERR("error stating %s", original)
return -1;
}
if (destbuf.st_uid != origbuf.st_uid
|| destbuf.st_gid != origbuf.st_gid) {
hLOG("Copying uid & gid: %s -> %s", original, dest);
if (lchown(dest, origbuf.st_uid, origbuf.st_gid)) {
sERR("Cannot change owner and group of %s", dest);
return -1;
}
}
return 0;
}
int util_is_link_owned_by_root(const char *link) {
if (!link) {
return 0;
}
struct stat buf;
if (!lstat(link, &buf)) {
if (buf.st_uid == (uid_t)0) {
return 1;
}
}
return 0;
}
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