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Don't use reserved symbols

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This commit is contained in:
topjohnwu 2020-11-03 01:12:33 -08:00
parent 89fff4830b
commit ffb4224640
3 changed files with 68 additions and 95 deletions
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4
native/jni/systemproperties/include/private/hacks.h
View File

@ -13,8 +13,8 @@
// Missing functions
#define fsetxattr(...) syscall(__NR_fsetxattr, __VA_ARGS__)
#define getline __getline
ssize_t __getline(char **, size_t *, FILE *);
#define getline compat_getline
ssize_t compat_getline(char **, size_t *, FILE *);
// Rename symbols
#pragma redefine_extname __system_property_set _system_property_set2

96
native/jni/utils/missing.cpp
View File

@ -10,83 +10,53 @@
#include "missing.hpp"
/* Original source: https://opensource.apple.com/source/cvs/cvs-19/cvs/lib/getline.c
* License: GPL 2 or later
* Adjusted to match POSIX */
#define MIN_CHUNK 64
ssize_t __getdelim(char **lineptr, size_t *n, int delim, FILE *stream) {
size_t nchars_avail;
char *read_pos;
/* Original source: https://github.com/freebsd/freebsd/blob/master/contrib/file/src/getline.c
* License: BSD, full copyright notice please check original source */
if (!lineptr || !n || !stream) {
errno = EINVAL;
return -1;
}
ssize_t compat_getdelim(char **buf, size_t *bufsiz, int delimiter, FILE *fp) {
char *ptr, *eptr;
if (!*lineptr) {
*n = MIN_CHUNK;
*lineptr = (char *) malloc(*n);
if (!*lineptr) {
errno = ENOMEM;
if (*buf == nullptr || *bufsiz == 0) {
*bufsiz = BUFSIZ;
if ((*buf = (char *) malloc(*bufsiz)) == nullptr)
return -1;
}
}
nchars_avail = *n;
read_pos = *lineptr;
for (;;) {
int save_errno;
int c = getc(stream);
save_errno = errno;
if (nchars_avail < 2) {
if (*n > MIN_CHUNK)
*n *= 2;
for (ptr = *buf, eptr = *buf + *bufsiz;;) {
int c = fgetc(fp);
if (c == -1) {
if (feof(fp))
return ptr == *buf ? -1 : ptr - *buf;
else
*n += MIN_CHUNK;
nchars_avail = *n + *lineptr - read_pos;
*lineptr = (char *) realloc(*lineptr, *n);
if (!*lineptr) {
errno = ENOMEM;
return -1;
}
read_pos = *n - nchars_avail + *lineptr;
}
if (ferror(stream)) {
errno = save_errno;
return -1;
*ptr++ = c;
if (c == delimiter) {
*ptr = '\0';
return ptr - *buf;
}
if (c == EOF) {
if (read_pos == *lineptr)
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;
else
break;
*buf = nbuf;
*bufsiz = nbufsiz;
eptr = nbuf + nbufsiz;
ptr = nbuf + d;
}
*read_pos++ = c;
nchars_avail--;
if (c == delim)
break;
}
*read_pos = '\0';
return read_pos - *lineptr;
}
ssize_t __getline(char **lineptr, size_t *n, FILE *stream) {
return getdelim(lineptr, n, '\n', stream);
ssize_t compat_getline(char **buf, size_t *bufsiz, FILE *fp) {
return getdelim(buf, bufsiz, '\n', fp);
}
/* mntent functions are copied from AOSP libc/bionic/mntent.cpp */
/* Original source: https://android.googlesource.com/platform/bionic/+/master/libc/bionic/mntent.cpp
* License: AOSP, full copyright notice please check original source */
struct mntent *__getmntent_r(FILE* fp, struct mntent* e, char* buf, int buf_len) {
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".
@ -109,18 +79,18 @@ struct mntent *__getmntent_r(FILE* fp, struct mntent* e, char* buf, int buf_len)
return nullptr;
}
FILE *__setmntent(const char* path, const char* mode) {
FILE *compat_setmntent(const char* path, const char* mode) {
return fopen(path, mode);
}
int __endmntent(FILE* fp) {
int compat_endmntent(FILE* fp) {
if (fp != nullptr) {
fclose(fp);
}
return 1;
}
char *__hasmntopt(const struct mntent* mnt, const char* opt) {
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);

63
native/jni/utils/missing.hpp
View File

@ -4,62 +4,65 @@
#include <unistd.h>
#include <mntent.h>
#define getline __getline
#define getdelim __getdelim
#define setns __setns
#define unshare __unshare
#define accept4 __accept4
#define dup3 __dup3
#define readlinkat __readlinkat
#define symlinkat __symlinkat
#define linkat __linkat
#define inotify_init1 __inotify_init1
#define getmntent_r __getmntent_r
#define setmntent __setmntent
#define endmntent __endmntent
#define hasmntopt __hasmntopt
#define faccessat __faccessat
// Missing libc functions
#define getline compat_getline
#define getdelim compat_getdelim
#define getmntent_r compat_getmntent_r
#define setmntent compat_setmntent
#define endmntent compat_endmntent
#define hasmntopt compat_hasmntopt
ssize_t __getline(char **lineptr, size_t *n, FILE *stream);
ssize_t __getdelim(char **lineptr, size_t *n, int delim, FILE *stream);
struct mntent *__getmntent_r(FILE* fp, struct mntent* e, char* buf, int buf_len);
FILE *__setmntent(const char* path, const char* mode);
int __endmntent(FILE* fp);
char *__hasmntopt(const struct mntent* mnt, const char* opt);
// Missing syscall wrappers
#define setns compat_setns
#define unshare compat_unshare
#define accept4 compat_accept4
#define dup3 compat_dup3
#define readlinkat compat_readlinkat
#define symlinkat compat_symlinkat
#define linkat compat_linkat
#define inotify_init1 compat_inotify_init1
#define faccessat compat_faccessat
static inline int __setns(int fd, int nstype) {
ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream);
ssize_t compat_getdelim(char **lineptr, size_t *n, int delim, FILE *stream);
struct mntent *compat_getmntent_r(FILE* fp, struct mntent* e, char* buf, int buf_len);
FILE *compat_setmntent(const char* path, const char* mode);
int compat_endmntent(FILE* fp);
char *compat_hasmntopt(const struct mntent* mnt, const char* opt);
static inline int compat_setns(int fd, int nstype) {
return syscall(__NR_setns, fd, nstype);
}
static inline int __unshare(int flags) {
static inline int compat_unshare(int flags) {
return syscall(__NR_unshare, flags);
}
static inline int __accept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags) {
static inline int compat_accept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags) {
return syscall(__NR_accept4, sockfd, addr, addrlen, flags);
}
static inline int __dup3(int oldfd, int newfd, int flags) {
static inline int compat_dup3(int oldfd, int newfd, int flags) {
return syscall(__NR_dup3, oldfd, newfd, flags);
}
static inline ssize_t __readlinkat(int dirfd, const char *pathname, char *buf, size_t bufsiz) {
static inline ssize_t compat_readlinkat(int dirfd, const char *pathname, char *buf, size_t bufsiz) {
return syscall(__NR_readlinkat, dirfd, pathname, buf, bufsiz);
}
static inline int __symlinkat(const char *target, int newdirfd, const char *linkpath) {
static inline int compat_symlinkat(const char *target, int newdirfd, const char *linkpath) {
return syscall(__NR_symlinkat, target, newdirfd, linkpath);
}
static inline int __linkat(int olddirfd, const char *oldpath,
static inline int compat_linkat(int olddirfd, const char *oldpath,
int newdirfd, const char *newpath, int flags) {
return syscall(__NR_linkat, olddirfd, oldpath, newdirfd, newpath, flags);
}
static inline int __inotify_init1(int flags) {
static inline int compat_inotify_init1(int flags) {
return syscall(__NR_inotify_init1, flags);
}
static inline int __faccessat(int dirfd, const char *pathname, int mode, int flags) {
static inline int compat_faccessat(int dirfd, const char *pathname, int mode, int flags) {
return syscall(__NR_faccessat, dirfd, pathname, mode, flags);
}