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/*
* FCRON - periodic command scheduler
*
* Copyright 2000-2016 Thibault Godouet <fcron@free.fr>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* The GNU General Public License can also be found in the file
* `LICENSE' that comes with the fcron source distribution.
*/
/* fcrondyn : interact dynamically with running fcron process :
* - list jobs, with their status, next time of execution, etc
* - run, delay a job
* - send a signal to a job
* - etc ...
*/
#include "fcrondyn.h"
#include "allow.h"
#include "read_string.h"
#include "mem.h"
#ifdef HAVE_LIBREADLINE
char **rl_cmpl_fcrondyn(const char *text, int start, int end);
char *rl_cmpl_command_generator(const char *text, int state);
#if defined(HAVE_READLINE_READLINE_H)
#include <readline/readline.h>
#elif defined(HAVE_READLINE_H)
#include <readline.h>
#endif /* !defined(HAVE_READLINE_H) */
#if defined(HAVE_READLINE_HISTORY_H)
#include <readline/history.h>
#elif defined(HAVE_HISTORY_H)
#include <history.h>
#endif /* defined(HAVE_READLINE_HISTORY_H) */
#endif /* HAVE_LIBREADLINE */
void info(void);
void usage(void);
void xexit(int exit_val);
RETSIGTYPE sigpipe_handler(int x);
int interactive_mode(int fd);
/* returned by parse_cmd() and/or talk_fcron() */
#define QUIT_CMD 1
#define HELP_CMD 2
#define ZEROLEN_CMD 3
#define CMD_NOT_FOUND 4
#define INVALID_ARG 5
int talk_fcron(char *cmd_str, int fd);
int parse_cmd(char *cmd_str, long int **cmd, int *cmd_len);
int connect_fcron(void);
int authenticate_user_password(int fd);
/* command line options */
char *cmd_str = NULL;
/* needed by log part : */
char *prog_name = NULL;
char foreground = 1;
pid_t daemon_pid = 0;
/* uid/gid of user/group root
* (we don't use the static UID or GID as we ask for user and group names
* in the configure script) */
uid_t rootuid = 0;
gid_t rootgid = 0;
/* misc */
char *user_str = NULL;
uid_t user_uid = 0;
gid_t user_gid = 0;
struct cmd_list_ent cmd_list[] = {
/* name, desc, num opt, cmd code, cmd opts, cmd defaults */
{"ls", {NULL}, "List all jobs of user", 1, CMD_LIST_JOBS,
{USER}, {CUR_USER}},
{"ls_lavgq", {}, "List jobs of user which are in lavg queue", 1,
CMD_LIST_LAVGQ, {USER}, {CUR_USER}},
{"ls_serialq", {}, "List jobs of user which are in serial queue",
1, CMD_LIST_SERIALQ, {USER}, {CUR_USER}},
{"ls_exeq", {}, "List running jobs of user", 1, CMD_LIST_EXEQ,
{USER}, {CUR_USER}},
{"detail", {}, "Print details on job", 1, CMD_DETAILS,
{JOBID}, {ARG_REQUIRED}},
/* {"reschedule", {NULL}, "Reschedule next execution of job", 2,
CMD_RESCHEDULE, {TIME_AND_DATE, JOBID}, {ARG_REQUIRED, ARG_REQUIRED}}, */
{"runnow", {}, "Advance next execution of job to now", 1, CMD_RUNNOW,
{JOBID}, {ARG_REQUIRED}},
{"run", {}, "Run job now (without changing its current schedule)", 1,
CMD_RUN, {JOBID}, {ARG_REQUIRED}},
{"kill", {}, "Send signal to running job", 2, CMD_SEND_SIGNAL,
{SIGNAL, JOBID}, {ARG_REQUIRED, ARG_REQUIRED}},
{"renice", {}, "Renice running job", 2, CMD_RENICE,
{NICE_VALUE, JOBID}, {ARG_REQUIRED, ARG_REQUIRED}},
{"quit", {"q", "exit"}, "Quit fcrondyn", 0, QUIT_CMD, {}, {}},
{"help", {"h"}, "Display a help message", 0, HELP_CMD, {}, {}},
};
const int cmd_list_len = sizeof(cmd_list) / sizeof(cmd_list_ent);
void
info(void)
/* print some informations about this program :
* version, license */
{
fprintf(stderr,
"fcrondyn " VERSION_QUOTED
" - interact dynamically with daemon fcron\n" "Copyright "
COPYRIGHT_QUOTED " Thibault Godouet <fcron@free.fr>\n"
"This program is free software distributed WITHOUT ANY WARRANTY.\n"
"See the GNU General Public License for more details.\n");
exit(EXIT_OK);
}
void
usage(void)
/* print a help message about command line options and exit */
{
fprintf(stderr,
"fcrondyn [-i]\n"
"fcrondyn -x {command}\n"
"fcrondyn -h\n"
" -i run fcrontab in interactive mode.\n"
" -x execute one command (in batch mode)\n"
" -c f make fcrontab use config file f.\n"
" -d set up debug mode.\n"
" -h display this help message.\n"
" -V display version & infos about fcrondyn.\n" "\n"
"To list the available commands, run:\n" " fcrondyn -x help\n");
exit(EXIT_ERR);
}
RETSIGTYPE
sigpipe_handler(int x)
/* handle broken pipes ... */
{
fprintf(stderr,
"Broken pipe : fcron may have closed the connection\nThe connection "
"has been idle for more than %ds, or fcron may not be running anymore.\n",
MAX_IDLE_TIME);
fprintf(stderr, "Exiting ...\n");
xexit(EXIT_ERR);
}
void
xexit(int exit_val)
/* clean & exit */
{
Free_safe(cmd_str);
exit(exit_val);
}
/* used in parse_cmd : */
#define Write_cmd(DATA) \
memcpy(buf + *cmd_len, &DATA, sizeof(long int)); \
*cmd_len += 1;
#define Strncmp(STR1, STR2, STR1_SIZE) \
strncmp(STR1, STR2, (STR1_SIZE < strlen(STR2)) ? strlen(STR2) : STR1_SIZE)
int
parse_cmd(char *cmd_str, long int **cmd, int *cmd_len)
/* read a command string, check if it is valid and translate it */
{
long int buf[SOCKET_MSG_LEN];
int word_size = 0;
int i = 0, j = 0, rank = -1;
long int int_buf = 0;
struct passwd *pass = NULL;
#ifdef SYSFCRONTAB
long int sysfcrontab_uid = SYSFCRONTAB_UID;
#endif
bzero(buf, sizeof(buf));
*cmd_len = 0;
remove_blanks(cmd_str); /* at the end of the string */
if ((word_size = get_word(&cmd_str)) == 0) {
fprintf(stderr, "Warning : Zero-length command name : line ignored.\n");
return ZEROLEN_CMD;
}
for (i = 0; i < cmd_list_len; i++) {
int j;
if (Strncmp(cmd_str, cmd_list[i].cmd_name, word_size) == 0) {
rank = i;
break;
}
for (j = 0; j < MAX_NUM_ALIAS && cmd_list[i].cmd_alias[j] != NULL; j++) {
if (Strncmp(cmd_str, cmd_list[i].cmd_alias[j], word_size) == 0) {
rank = i;
break;
}
}
}
if (rank == (-1)) {
fprintf(stderr, "Error : Unknown command.\n");
return CMD_NOT_FOUND;
}
else if (cmd_list[rank].cmd_code == QUIT_CMD) {
if (debug_opt)
fprintf(stderr, "quit command\n");
return QUIT_CMD;
}
else if (cmd_list[rank].cmd_code == HELP_CMD) {
if (debug_opt)
fprintf(stderr, "Help command\n");
return HELP_CMD;
}
Write_cmd(cmd_list[rank].cmd_code);
if (debug_opt)
fprintf(stderr, "command : %s\n", cmd_list[i].cmd_name);
cmd_str += word_size;
for (i = 0; i < cmd_list[rank].cmd_numopt; i++) {
if ((word_size = get_word(&cmd_str)) == 0) {
if (cmd_list[rank].cmd_default[i] == ARG_REQUIRED) {
fprintf(stderr, "Error : arg required !\n");
return INVALID_ARG;
}
/* use default value : currently, works only with CUR_USER */
if (user_uid == rootuid) {
/* default for root = all */
int_buf = ALL;
Write_cmd(int_buf);
if (debug_opt)
fprintf(stderr, " uid = ALL\n");
}
else {
Write_cmd(user_uid);
if (debug_opt)
fprintf(stderr, " uid = %d\n", (int)user_uid);
}
}
else {
/* get value from line ... */
switch (cmd_list[rank].cmd_opt[i]) {
case USER:
int_buf = (long int)*(cmd_str + word_size);
*(cmd_str + word_size) = '\0';
#ifdef SYSFCRONTAB
if (strcmp(cmd_str, SYSFCRONTAB) == 0) {
Write_cmd(sysfcrontab_uid);
}
else {
#endif
if ((pass = getpwnam(cmd_str)) == NULL) {
fprintf(stderr,
"Error : '%s' isn't a valid username.\n",
cmd_str);
return INVALID_ARG;
}
Write_cmd(pass->pw_uid);
#ifdef SYSFCRONTAB
}
#endif
*(cmd_str + word_size) = (char)int_buf;
cmd_str += word_size;
if (debug_opt)
fprintf(stderr, " uid = %d\n",
#ifdef SYSFCRONTAB
(pass) ? (int)pass->pw_uid : (int)SYSFCRONTAB_UID
#else
(int)pass->pw_uid
#endif
);
break;
case JOBID:
/* after strtol(), cmd_str will be updated (first non-number char) */
if ((int_buf = strtol(cmd_str, &cmd_str, 10)) < 0
|| int_buf >= LONG_MAX || (!isspace((int)*cmd_str)
&& *cmd_str != '\0')) {
fprintf(stderr, "Error : invalid jobid.\n");
return INVALID_ARG;
}
Write_cmd(int_buf);
if (debug_opt)
fprintf(stderr, " jobid = %ld\n", int_buf);
break;
case TIME_AND_DATE:
/* argghh !!! no standard function ! */
break;
case NICE_VALUE:
/* after strtol(), cmd_str will be updated (first non-number char) */
if ((int_buf = strtol(cmd_str, &cmd_str, 10)) > 20
|| (int_buf < 0 && getuid() != rootuid) || int_buf < -20
|| (!isspace((int)*cmd_str) && *cmd_str != '\0')) {
fprintf(stderr, "Error : invalid nice value.\n");
return INVALID_ARG;
}
Write_cmd(int_buf);
if (debug_opt)
fprintf(stderr, " nicevalue = %ld\n", int_buf);
break;
case SIGNAL:
if (isalpha((int)*cmd_str)) {
for (j = 0; j < word_size; j++)
*(cmd_str + j) = tolower(*(cmd_str + j));
if (Strncmp(cmd_str, "hup", word_size) == 0)
int_buf = SIGHUP;
else if (Strncmp(cmd_str, "int", word_size) == 0)
int_buf = SIGINT;
else if (Strncmp(cmd_str, "quit", word_size) == 0)
int_buf = SIGQUIT;
else if (Strncmp(cmd_str, "kill", word_size) == 0)
int_buf = SIGKILL;
else if (Strncmp(cmd_str, "alrm", word_size) == 0)
int_buf = SIGALRM;
else if (Strncmp(cmd_str, "term", word_size) == 0)
int_buf = SIGTERM;
else if (Strncmp(cmd_str, "usr1", word_size) == 0)
int_buf = SIGUSR1;
else if (Strncmp(cmd_str, "usr2", word_size) == 0)
int_buf = SIGUSR2;
else if (Strncmp(cmd_str, "cont", word_size) == 0)
int_buf = SIGCONT;
else if (Strncmp(cmd_str, "stop", word_size) == 0)
int_buf = SIGSTOP;
else if (Strncmp(cmd_str, "tstp", word_size) == 0)
int_buf = SIGTSTP;
else {
fprintf(stderr,
"Error : unknow signal (try integer value)\n");
return INVALID_ARG;
}
cmd_str += word_size;
}
/* after strtol(), cmd_str will be updated (first non-number char) */
else if ((int_buf = strtol(cmd_str, &cmd_str, 10)) <= 0
|| int_buf >= LONG_MAX || (!isspace((int)*cmd_str)
&& *cmd_str != '\0')) {
fprintf(stderr, "Error : invalid signal value.\n");
return INVALID_ARG;
}
Write_cmd(int_buf);
if (debug_opt)
fprintf(stderr, " signal = %ld\n", int_buf);
break;
default:
fprintf(stderr, "Error : Unknown arg !");
return INVALID_ARG;
}
}
}
Skip_blanks(cmd_str);
if (*cmd_str != '\0')
fprintf(stderr, "Warning : too much arguments : '%s' ignored.\n",
cmd_str);
/* This is a valid command ... */
*cmd = alloc_safe(*cmd_len * sizeof(long int), "command string");
memcpy(*cmd, buf, *cmd_len * sizeof(long int));
return OK;
}
int
authenticate_user_password(int fd)
/* authenticate user */
{
char *password = NULL;
char buf[USER_NAME_LEN + 16];
int len = 0;
fd_set read_set; /* needed to use select to check if some data is waiting */
struct timeval tv;
snprintf(buf, sizeof(buf), "password for %s :", user_str);
if ((password = read_string(CONV_ECHO_OFF, buf)) == NULL)
return ERR;
len = snprintf(buf, sizeof(buf), "%s", user_str) + 1;
len += snprintf(buf + len, sizeof(buf) - len, "%s", password) + 1;
send(fd, buf, len, 0);
Overwrite(buf);
Overwrite(password);
Free_safe(password);
tv.tv_sec = MAX_WAIT_TIME;
tv.tv_usec = 0;
FD_ZERO(&read_set);
FD_SET(fd, &read_set);
if (select(fd + 1, &read_set, NULL, NULL, &tv) <= 0) {
error_e("Couldn't get data from socket during %d seconds.",
MAX_WAIT_TIME);
return ERR;
}
while (recv(fd, buf, sizeof(buf), 0) < 0 && errno == EINTR)
if (errno == EINTR && debug_opt)
fprintf(stderr, "Got EINTR ...");
if (strncmp(buf, "1", sizeof("1")) != 0)
return ERR;
return OK;
}
int
connect_fcron(void)
/* connect to fcron through a socket, and identify user */
{
int fd = -1;
struct sockaddr_un addr;
int len = 0;
int sun_len = 0;
if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) == -1)
die_e("could not create socket");
addr.sun_family = AF_UNIX;
len = strlen(fifofile);
if (len > sizeof(addr.sun_path) - 1)
die("Error : fifo file path too long (max is %d)",
sizeof(addr.sun_path) - 1);
/* length(fifofile) < sizeof(add.sun_path), so strncpy will terminate
* the string with at least one \0 (not necessarily required by the OS,
* but still a good idea) */
strncpy(addr.sun_path, fifofile, sizeof(addr.sun_path));
addr.sun_path[sizeof(addr.sun_path) - 1] = '\0';
sun_len = (addr.sun_path - (char *)&addr) + len;
#if HAVE_SA_LEN
addr.sun_len = sun_len;
#endif
if (connect(fd, (struct sockaddr *)&addr, sun_len) < 0)
die_e("Cannot connect() to fcron (check if fcron is running)");
/* Nothing to do on the client side if we use SO_PASSCRED */
#if !defined(SO_PASSCRED) && !defined(HAVE_GETPEERUCRED) && !defined(HAVE_GETPEEREID)
if (authenticate_user_password(fd) == ERR) {
fprintf(stderr, "Invalid password or too many authentication failures"
" (try to connect later).\n(In the later case, fcron rejects all"
" new authentication during %d secs)\n", AUTH_WAIT);
die("Unable to authenticate user");
}
#endif /* SO_PASSCRED HAVE_GETPEERUCRED HAVE_GETPEEREID */
return fd;
}
int
talk_fcron(char *cmd_str, int fd)
/* read a string command, check if it is valid and translate it,
* send it to fcron, and print its answer */
{
long int *cmd = NULL;
int cmd_len = 0;
char buf[LINE_LEN];
ssize_t read_len = 0;
char existing_connection = (fd < 0) ? 0 : 1;
fd_set read_set; /* needed to use select to check if some data is waiting */
struct timeval tv;
switch (parse_cmd(cmd_str, &cmd, &cmd_len)) {
case OK:
break;
case HELP_CMD:
{
int i, j, len;
printf("Command recognized by fcrondyn :\n");
printf("------------------------------\n");
for (i = 0; i < cmd_list_len; i++) {
len = printf("%s ", cmd_list[i].cmd_name);
/* print args : */
for (j = 0; j < cmd_list[i].cmd_numopt; j++) {
if (cmd_list[i].cmd_default[j] != ARG_REQUIRED)
len += printf("[");
switch (cmd_list[i].cmd_opt[j]) {
case USER:
len += printf("user");
break;
case JOBID:
len += printf("jobid");
break;
case TIME_AND_DATE:
len += printf("time");
break;
case NICE_VALUE:
len += printf("niceval");
break;
case SIGNAL:
len += printf("sig");
break;
case BOOLEAN:
len += printf("bool");
break;
default:
len += printf("unknown_arg!");
}
if (cmd_list[i].cmd_default[j] != ARG_REQUIRED)
len += printf("]");
len += printf(" ");
}
/* Align correctly the descriptions : */
printf("%*s%s", 24 - len, "", cmd_list[i].cmd_desc);
/* print alias list (if any) */
if (cmd_list[i].cmd_alias[0] != NULL) {
printf(" (aliases:");
for (j = 0;
j < MAX_NUM_ALIAS && cmd_list[i].cmd_alias[j] != NULL;
j++) {
printf(" %s", cmd_list[i].cmd_alias[j]);
}
printf(")");
}
printf("\n");
}
}
return HELP_CMD;
case QUIT_CMD:
return QUIT_CMD;
case CMD_NOT_FOUND:
return CMD_NOT_FOUND;
case INVALID_ARG:
return INVALID_ARG;
case ZEROLEN_CMD:
return ZEROLEN_CMD;
default:
return ERR;
}
/* This is a valid command (so we'll have to free() it) ... */
if (!existing_connection && (fd = connect_fcron()) == ERR)
return ERR;
send(fd, cmd, cmd_len * sizeof(long int), 0);
Free_safe(cmd);
cmd_len = 0;
tv.tv_sec = MAX_WAIT_TIME;
tv.tv_usec = 0;
FD_ZERO(&read_set);
FD_SET(fd, &read_set);
if (select(fd + 1, &read_set, NULL, NULL, &tv) <= 0) {
error_e("Couldn't get data from socket during %d seconds.",
MAX_WAIT_TIME);
return ERR;
}
while ((read_len = recv(fd, buf, sizeof(buf) - 1, 0)) >= 0
|| errno == EINTR) {
if (errno == EINTR && debug_opt)
fprintf(stderr, "got EINTR ...\n");
else if (read_len > sizeof(buf)) {
/* weird ... no data yet ? */
if (debug_opt)
fprintf(stderr, "no data yet ?");
}
else if (read_len <= 0) {
if (debug_opt)
fprintf(stderr, "read_len = %d\n", (int)read_len);
fprintf(stderr, "connection closed by fcron\n");
shutdown(fd, SHUT_RDWR);
return ERR;
}
else {
/* ensure the string is terminated by a '\0' for when we'll printf() it */
buf[read_len] = '\0';
printf("%s", buf);
/* check for the end of command output marker */
if (read_len >= sizeof(END_STR) &&
strncmp(&buf[read_len - sizeof(END_STR)], END_STR,
sizeof(END_STR)) == 0)
break;
}
}
if (read_len < 0) {
error_e("error in recv()");
}
if (!existing_connection)
xclose_check(&fd, "unix socket");
return OK;
}
#ifdef HAVE_LIBREADLINE
/* Attempt to complete on the contents of TEXT. START and END bound the
region of rl_line_buffer that contains the word to complete. TEXT is
the word to complete. We can use the entire contents of rl_line_buffer
in case we want to do some simple parsing. Return the array of matches,
or NULL if there aren't any. */
char **
rl_cmpl_fcrondyn(const char *text, int start, int end)
{
char **matches;
matches = (char **)NULL;
/* If this word is at the start of the line, then it is a command
* to complete. Otherwise it is an argument which we ignore for now */
if (start == 0) {
matches = rl_completion_matches(text, rl_cmpl_command_generator);
}
return (matches);
}
/* Generator function for command completion. STATE lets us know whether
to start from scratch; without any state (i.e. STATE == 0), then we
start at the top of the list. */
char *
rl_cmpl_command_generator(const char *text, int state)
{
static int list_index, len;
char *name = NULL;
/* If this is a new word to complete, initialize now. This includes
* saving the length of TEXT for efficiency, and initializing the index
* variable to 0. */
if (!state) {
list_index = 0;
len = strlen(text);
}
/* Return the next name which partially matches from the command list. */
while (list_index < cmd_list_len) {
name = cmd_list[list_index].cmd_name;
list_index++;
if (strncmp(name, text, len) == 0) {
return (strdup2(name));
}
}
/* If no names matched, then return NULL. */
return ((char *)NULL);
}
#endif /* HAVE_LIBREADLINE */
int
interactive_mode(int fd)
/* provide user a prompt, read command, send it to fcron, print its answer,
* then give another prompt, etc, until user type an exit command */
{
char existing_connection = (fd < 0) ? 0 : 1;
int return_code = 0;
#ifdef HAVE_LIBREADLINE
char *line_read = NULL;
#else /* HAVE_LIBREADLINE */
char buf[LINE_LEN];
#endif /* HAVE_LIBREADLINE */
if (!existing_connection && (fd = connect_fcron()) == ERR)
return ERR;
#ifdef HAVE_LIBREADLINE
/* Allow conditional parsing of the ~/.inputrc file. */
rl_readline_name = "fcrondyn";
/* Tell the completer that we want a crack first. */
rl_attempted_completion_function = rl_cmpl_fcrondyn;
while (1) {
line_read = readline("fcrondyn> ");
if (line_read == NULL) {
/* Handle EOF gracefully and move past the prompt line */
printf("\n");
break;
}
return_code = talk_fcron(line_read, fd);
#ifdef HAVE_READLINE_HISTORY
if (line_read && *line_read) {
add_history(line_read);
}
#endif /* HAVE_READLINE_HISTORY */
free(line_read);
if (return_code == QUIT_CMD || return_code == ERR) {
break;
}
}
#else /* HAVE_LIBREADLINE */
while (fprintf(stderr, "fcrondyn> ")
&& fgets(buf, sizeof(buf), stdin) != NULL
&& (return_code = talk_fcron(buf, fd)) != QUIT_CMD
&& return_code != ERR) ;
#endif /* HAVE_LIBREADLINE */
if (!existing_connection)
xclose_check(&fd, "unix socket");
return OK;
}
void
parseopt(int argc, char *argv[])
/* set options */
{
int c, i;
extern char *optarg;
extern int optind, opterr, optopt;
/* constants and variables defined by command line */
while (1) {
c = getopt(argc, argv, "hVdc:ix:");
if (c == EOF)
break;
switch (c) {
case 'V':
info();
break;
case 'h':
usage();
break;
case 'd':
debug_opt = 1;
break;
case 'c':
Set(fcronconf, optarg);
break;
case 'i':
Free_safe(cmd_str);
break;
case 'x':
Set(cmd_str, optarg);
break;
case ':':
fprintf(stderr, "(setopt) Missing parameter.\n");
usage();
case '?':
usage();
default:
fprintf(stderr, "(setopt) Warning: getopt returned %c.\n", c);
}
}
if (optind < argc) {
for (i = optind; i <= argc; i++)
fprintf(stderr, "Unknown argument \"%s\"", argv[i]);
usage();
}
}
int
main(int argc, char **argv)
{
int return_code = 0;
int fd = (-1); /* fd == -1 means connection to fcron is not currently open */
struct passwd *pass = NULL;
rootuid = get_user_uid_safe(ROOTNAME);
rootgid = get_group_gid_safe(ROOTGROUP);
if (strrchr(argv[0], '/') == NULL)
prog_name = argv[0];
else
prog_name = strrchr(argv[0], '/') + 1;
user_uid = getuid();
user_gid = getgid();
if ((pass = getpwuid(user_uid)) == NULL)
die("user \"%s\" is not in passwd file. Aborting.", USERNAME);
user_str = strdup2(pass->pw_name);
/* drop suid rights that we don't need, but keep the sgid rights
* for now as we will need them for read_conf() and is_allowed() */
#ifdef USE_SETE_ID
seteuid_safe(user_uid);
#endif
if (setuid(user_uid) < 0)
die_e("could not setuid() to %d", user_uid);
/* interpret command line options */
parseopt(argc, argv);
/* read fcron.conf and update global parameters */
read_conf();
if (!is_allowed(user_str)) {
die("User \"%s\" is not allowed to use %s. Aborting.", user_str,
prog_name);
}
/* we don't need anymore special rights : drop remaining ones */
#ifdef USE_SETE_ID
setegid_safe(user_gid);
#endif
if (setgid(user_gid) < 0)
die_e("could not setgid() to %d", user_gid);
/* check for broken pipes ... */
signal(SIGPIPE, sigpipe_handler);
if (cmd_str == NULL)
return_code = interactive_mode(fd);
else
return_code = talk_fcron(cmd_str, fd);
xexit((return_code == OK) ? EXIT_OK : EXIT_ERR);
/* never reached */
return EXIT_OK;
}