mirror of
https://github.com/fastfetch-cli/fastfetch.git
synced 2026-10-28 07:44:06 +01:00
李通洲
66 lines
2.6 KiB
C
66 lines
2.6 KiB
C
#include "common/android/package.h"
|
|
#include "common/android/api.h"
|
|
#include "common/debug.h"
|
|
#include "common/strutil.h"
|
|
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
// There is no way for a process to ask for its own package name: it is not in /proc/self/status, and
|
|
// an app cannot list /data/data. The executable path carries it instead -- an app's binaries live
|
|
// under /data/data/<package>/ or /data/user/<user>/<package>/, and /proc/self/exe resolves there.
|
|
// Under Termux that is /data/data/com.termux/files/usr/bin/<binary>, whose third component is the
|
|
// package.
|
|
//
|
|
// The memory cgroup carries the same information (4:memory:/apps/com.termux on the device this was
|
|
// verified on), but the unified hierarchy spells it out as /apps/uid_10478/pid_26943 with no name
|
|
// left in it, so the executable is the portable half of the two.
|
|
bool ffAndroidGetOwnPackage(char* buffer, size_t capacity) {
|
|
char path[4096];
|
|
const ssize_t length = readlink("/proc/self/exe", path, sizeof(path) - 1);
|
|
if (length <= 0) {
|
|
FF_DEBUG("Cannot read /proc/self/exe, so the calling package cannot be derived");
|
|
return false;
|
|
}
|
|
path[length] = '\0';
|
|
|
|
const char* rest = nullptr;
|
|
const char* const dataPrefix = "/data/data/";
|
|
const char* const userPrefix = "/data/user/";
|
|
if (ffStrStartsWith(path, dataPrefix)) {
|
|
rest = path + strlen(dataPrefix);
|
|
} else if (ffStrStartsWith(path, userPrefix)) {
|
|
// /data/user/<user>/<package>/... -- the user number has to be stepped over before the
|
|
// package name starts, and only strchr() answers where that is.
|
|
rest = strchr(path + strlen(userPrefix), '/');
|
|
if (rest != nullptr) {
|
|
rest += 1;
|
|
}
|
|
}
|
|
|
|
if (rest == nullptr) {
|
|
const uint32_t uid = instance.state.platform.uid;
|
|
FF_DEBUG("The executable is not in an app data directory (\"%s\"), uid %u", path, uid);
|
|
if (uid != FF_ANDROID_PRIVILEGED_UID_SHELL) {
|
|
return false;
|
|
}
|
|
static const char shellPackage[] = FF_ANDROID_SHELL_PACKAGE;
|
|
if (sizeof(shellPackage) > capacity) {
|
|
return false;
|
|
}
|
|
memcpy(buffer, shellPackage, sizeof(shellPackage));
|
|
FF_DEBUG("The calling package is \"%s\" (the shell owns it)", buffer);
|
|
return true;
|
|
}
|
|
|
|
const char* end = strchr(rest, '/');
|
|
const size_t nameLength = end != nullptr ? (size_t) (end - rest) : strlen(rest);
|
|
if (nameLength == 0 || nameLength >= capacity) {
|
|
return false;
|
|
}
|
|
memcpy(buffer, rest, nameLength);
|
|
buffer[nameLength] = '\0';
|
|
FF_DEBUG("The calling package is \"%s\"", buffer);
|
|
return true;
|
|
}
|