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Use /proc/self/exe to restart itself

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This commit is contained in:
Andrea Mazzoleni 2025-10-16 15:54:00 +02:00
parent f7798b2357
commit adce4ce5f7
1 changed files with 26 additions and 3 deletions
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29
cmdline/main.c
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@ -1,4 +1,3 @@
/*
* Copyright (C) 2025 Andrea Mazzoleni
*
@ -213,6 +212,25 @@ int main(int argc, char* argv[])
return ret;
}
#else
char full_argv0[PATH_MAX];
const char* get_argv0(const char* argv0)
{
ssize_t len = readlink("/proc/self/exe", full_argv0, sizeof(full_argv0) - 1);
if (len != -1) {
full_argv0[len] = '\0';
return full_argv0;
} else {
#ifdef __APPLE__
uint32_t size = sizeof(full_argv0);
if (_NSGetExecutablePath(full_argv0, &size) == 0)
return full_argv0;
#endif
}
return argv0;
}
int main(int argc, char* argv[])
{
int mode;
@ -237,11 +255,16 @@ int main(int argc, char* argv[])
} else {
pid_t pid = fork();
if (pid == -1) {
perror("Failed to fork the SnapRAID child process");
exit(EXIT_FAILURE);
}
if (pid == 0) {
execv(argv[0], argv);
const char* argv0 = get_argv0(argv[0]);
execvp(argv0, argv);
perror("Failed to exec SnapRAID");
/* here it's an error */
exit(EXIT_FAILURE);
@ -252,7 +275,7 @@ int main(int argc, char* argv[])
if (waitpid(pid, &status, 0) == -1) {
exit(EXIT_FAILURE);
}
if (WIFEXITED(status)) {
ret = WEXITSTATUS(status);
} else if (WIFSIGNALED(status)) {