utils.c File Reference

#include "gw-config.h"
#include <ctype.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <termios.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <pwd.h>
#include <grp.h>
#include "gwlib.h"

Include dependency graph for utils.c:

Go to the source code of this file.

Defines

#define PANIC_SCRIPT_MAX_LEN 4096

Functions

void parachute_sig_handler (int signum)

void parachute_init_signals (int child)

int is_executable (const char *filename)

int become_daemon (void)

PRINTFLIKE (2, 3)

void parachute_start (const char *myname, const char *panic_script)

void write_pid_file (void)

void remove_pid_file (void)

int change_user (const char *user)

MultibyteInt get_variable_value (Octet *source, int *len)

int write_variable_value (MultibyteInt value, Octet *dest)

Octet reverse_octet (Octet source)

int get_and_set_debugs (int argc, char **argv, int(*find_own)(int index, int argc, char **argv))

int pattern_matches_ip (Octstr *pattern, Octstr *ip)

int pattern_list_matches_ip (Octstr *pattern_list, Octstr *ip)

int is_allowed_ip (Octstr *allow_ip, Octstr *deny_ip, Octstr *ip)

int connect_denied (Octstr *allow_ip, Octstr *ip)

int does_prefix_match (Octstr *prefix, Octstr *number)

int normalize_number (char *dial_prefixes, Octstr **number)

long decode_network_long (unsigned char *data)

void encode_network_long (unsigned char *data, unsigned long value)

void kannel_cfmakeraw (struct termios *tio)

int gw_isdigit (int c)

int gw_isxdigit (int c)

int roundup_div (int a, int b)

unsigned long long gw_generate_id (void)

Variables

pid_t child_pid = -1

sigaction child_actions [32]

int child_actions_init = 0

char * pid_file = NULL

volatile sig_atomic_t parachute_shutdown = 0

Define Documentation

#define PANIC_SCRIPT_MAX_LEN 4096

Definition at line 205 of file utils.c.
Referenced by PRINTFLIKE().

Function Documentation

int become_daemon ( void ) [static]

Definition at line 180 of file utils.c.
References panic.
Referenced by get_and_set_debugs().
00181 { 00182 int fd; 00183 if (getppid() != 1) { 00184 signal(SIGTTOU, SIG_IGN); 00185 signal(SIGTTIN, SIG_IGN); 00186 signal(SIGTSTP, SIG_IGN); 00187 if (fork()) 00188 return 0; 00189 setsid(); 00190 } 00191 00192 close(STDIN_FILENO); 00193 close(STDOUT_FILENO); 00194 close(STDERR_FILENO); 00195 fd = open("/dev/null", O_RDWR); /* stdin */ 00196 if (fd == -1) 00197 panic(errno, "Could not open `/dev/null'"); 00198 dup(fd); /* stdout */ 00199 dup(fd); /* stderr */ 00200 00201 chdir("/"); 00202 return 1; 00203 }

int change_user ( const char * user ) [static]

Definition at line 349 of file utils.c.
References error().
Referenced by get_and_set_debugs().
00350 { 00351 struct passwd *pass; 00352 00353 if (!user) 00354 return -1; 00355 00356 pass = getpwnam(user); 00357 if (!pass) { 00358 error(0, "Could not find a user `%s' in system.", user); 00359 return -1; 00360 } 00361 00362 if (-1 == setgid(pass->pw_gid)) { 00363 error(errno, "Could not change group id from %ld to %ld.", (long) getgid(), (long) pass->pw_gid); 00364 return -1; 00365 } 00366 00367 if (initgroups(user, -1) == -1) { 00368 error(errno, "Could not set supplementary group ID's."); 00369 } 00370 00371 if (-1 == setuid(pass->pw_uid)) { 00372 error(errno, "Could not change user id from %ld to %ld.", (long) getuid(), (long) pass->pw_uid); 00373 return -1; 00374 } 00375 00376 return 0; 00377 }