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Replace parse_mnt with parse_mount_info

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This commit is contained in:
LoveSy
2023-03-06 15:57:00 +08:00
committed by John Wu
parent f80d5d858e
commit 9555380818
3 changed files with 10 additions and 55 deletions
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39
native/src/base/files.cpp
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@@ -345,45 +345,6 @@ void parse_prop_file(const char *file, const function<bool(string_view, string_v
parse_prop_file(fp.get(), fn);
}
// Original source: https://android.googlesource.com/platform/bionic/+/master/libc/bionic/mntent.cpp
// License: AOSP, full copyright notice please check original source
static 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;
}
void parse_mnt(const char *file, const function<bool(mntent*)> &fn) {
auto fp = sFILE(setmntent(file, "re"), endmntent);
if (fp) {
mntent mentry{};
char buf[4096];
// getmntent_r from system's libc.so is broken on old platform
// use the compat one instead
while (compat_getmntent_r(fp.get(), &mentry, buf, sizeof(buf))) {
if (!fn(&mentry))
break;
}
}
}
std::vector<mount_info> parse_mount_info(const char *pid) {
char buf[PATH_MAX] = {};
ssprintf(buf, sizeof(buf), "/proc/%s/mountinfo", pid);