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/* Copyright (C) 2020 C. McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <grp.h>
#include <pwd.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <unistd.h>
typedef unsigned char byte;
extern struct Prepend {
size_t cap, len;
char **commands;
} prepend;
static inline void prependClear(void) {
for (size_t i = 0; i < prepend.len; ++i) {
free(prepend.commands[i]);
}
prepend.len = 0;
}
static inline int prependAdd(const char *command) {
if (prepend.len == prepend.cap) {
size_t cap = (prepend.cap ? prepend.cap * 2 : 8);
void *ptr = realloc(prepend.commands, sizeof(*prepend.commands) * cap);
if (!ptr) return -1;
prepend.cap = cap;
prepend.commands = ptr;
}
prepend.commands[prepend.len] = strdup(command);
if (!prepend.commands[prepend.len]) return -1;
prepend.len++;
return 0;
}
enum { LineCap = 512 };
struct Line {
size_t len;
char buf[LineCap];
};
static inline const char *lineFlush(struct Line *line) {
if (!line->len) return NULL;
line->buf[line->len++] = '\0';
return line->buf;
}
static inline const char *lineRead(struct Line *line, int fd) {
char *nul = memchr(line->buf, '\0', line->len);
if (nul) {
nul++;
line->len -= nul - line->buf;
memmove(line->buf, nul, line->len);
}
size_t cap = sizeof(line->buf) - line->len - 1;
if (!cap) return lineFlush(line);
ssize_t len = read(fd, &line->buf[line->len], cap);
if (len < 0 && errno != EAGAIN) return NULL;
if (len > 0) line->len += len;
char *nl = memchr(line->buf, '\n', line->len);
if (nl) {
*nl = '\0';
return line->buf;
} else {
errno = EAGAIN;
return NULL;
}
}
enum {
SHELL,
PATH,
USER,
HOME,
EnvironNull,
EnvironLen,
};
extern const char *serviceDir;
extern uid_t serviceUID;
extern gid_t serviceGID;
extern char *serviceEnviron[EnvironLen];
enum State {
Stop,
Start,
Restart,
};
struct Service {
char *name;
char *command;
bool privileged;
enum State intent;
enum State state;
pid_t pid;
int outPipe[2];
int errPipe[2];
struct Line outLine;
struct Line errLine;
struct timespec startTime;
struct timespec restartInterval;
struct timespec restartDeadline;
};
extern struct Services {
size_t cap, len;
struct Service *ptr;
} services;
int serviceAdd(const char *name, const char *command);
void serviceDrop(size_t index);
void serviceStatus(struct Service *service);
void serviceStart(struct Service *service);
void serviceStop(struct Service *service);
void serviceRestart(struct Service *service);
void serviceSignal(struct Service *service, int signal);
void serviceRead(struct Service *service);
void serviceReap(pid_t pid, int status);
extern char configError[];
int configParse(const char *path);
struct Set256 {
uint32_t bits[8];
};
static inline void setClear(struct Set256 *set) {
for (int i = 0; i < 8; ++i) set->bits[i] = 0;
}
static inline void setAdd(struct Set256 *set, byte x) {
set->bits[x / 32] |= 1 << (uint32_t)(x & 31);
}
static inline uint32_t setTest(const struct Set256 *set, byte x) {
return set->bits[x / 32] & (1 << (uint32_t)(x & 31));
}
extern struct Set256 stopExits;
extern struct timespec restartInterval;
extern struct timespec resetInterval;
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