110 lines
3.2 KiB
C++
110 lines
3.2 KiB
C++
/*
|
|
* Host all missing/incomplete implementation in bionic
|
|
* Copied from various sources
|
|
* */
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <mntent.h>
|
|
|
|
#include "missing.hpp"
|
|
|
|
/* Original source: https://github.com/freebsd/freebsd/blob/master/contrib/file/src/getline.c
|
|
* License: BSD, full copyright notice please check original source */
|
|
|
|
ssize_t compat_getdelim(char **buf, size_t *bufsiz, int delimiter, FILE *fp) {
|
|
char *ptr, *eptr;
|
|
|
|
if (*buf == nullptr || *bufsiz == 0) {
|
|
*bufsiz = BUFSIZ;
|
|
if ((*buf = (char *) malloc(*bufsiz)) == nullptr)
|
|
return -1;
|
|
}
|
|
|
|
for (ptr = *buf, eptr = *buf + *bufsiz;;) {
|
|
int c = fgetc(fp);
|
|
if (c == -1) {
|
|
if (feof(fp))
|
|
return ptr == *buf ? -1 : ptr - *buf;
|
|
else
|
|
return -1;
|
|
}
|
|
*ptr++ = c;
|
|
if (c == delimiter) {
|
|
*ptr = '\0';
|
|
return ptr - *buf;
|
|
}
|
|
if (ptr + 2 >= eptr) {
|
|
char *nbuf;
|
|
size_t nbufsiz = *bufsiz * 2;
|
|
ssize_t d = ptr - *buf;
|
|
if ((nbuf = (char *) realloc(*buf, nbufsiz)) == nullptr)
|
|
return -1;
|
|
*buf = nbuf;
|
|
*bufsiz = nbufsiz;
|
|
eptr = nbuf + nbufsiz;
|
|
ptr = nbuf + d;
|
|
}
|
|
}
|
|
}
|
|
|
|
ssize_t compat_getline(char **buf, size_t *bufsiz, FILE *fp) {
|
|
return getdelim(buf, bufsiz, '\n', fp);
|
|
}
|
|
|
|
/* Original source: https://android.googlesource.com/platform/bionic/+/master/libc/bionic/mntent.cpp
|
|
* License: AOSP, full copyright notice please check original source */
|
|
|
|
struct mntent *compat_getmntent_r(FILE* fp, struct mntent* e, char* buf, int buf_len) {
|
|
memset(e, 0, sizeof(*e));
|
|
while (fgets(buf, buf_len, fp) != nullptr) {
|
|
// Entries look like "proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0".
|
|
// That is: mnt_fsname mnt_dir mnt_type mnt_opts 0 0.
|
|
int fsname0, fsname1, dir0, dir1, type0, type1, opts0, opts1;
|
|
if (sscanf(buf, " %n%*s%n %n%*s%n %n%*s%n %n%*s%n %d %d",
|
|
&fsname0, &fsname1, &dir0, &dir1, &type0, &type1, &opts0, &opts1,
|
|
&e->mnt_freq, &e->mnt_passno) == 2) {
|
|
e->mnt_fsname = &buf[fsname0];
|
|
buf[fsname1] = '\0';
|
|
e->mnt_dir = &buf[dir0];
|
|
buf[dir1] = '\0';
|
|
e->mnt_type = &buf[type0];
|
|
buf[type1] = '\0';
|
|
e->mnt_opts = &buf[opts0];
|
|
buf[opts1] = '\0';
|
|
return e;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
FILE *compat_setmntent(const char* path, const char* mode) {
|
|
return fopen(path, mode);
|
|
}
|
|
|
|
int compat_endmntent(FILE* fp) {
|
|
if (fp != nullptr) {
|
|
fclose(fp);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
char *compat_hasmntopt(const struct mntent* mnt, const char* opt) {
|
|
char* token = mnt->mnt_opts;
|
|
char* const end = mnt->mnt_opts + strlen(mnt->mnt_opts);
|
|
const size_t optLen = strlen(opt);
|
|
while (token) {
|
|
char* const tokenEnd = token + optLen;
|
|
if (tokenEnd > end) break;
|
|
if (memcmp(token, opt, optLen) == 0 &&
|
|
(*tokenEnd == '\0' || *tokenEnd == ',' || *tokenEnd == '=')) {
|
|
return token;
|
|
}
|
|
token = strchr(token, ',');
|
|
if (token) token++;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|