~mdw / tripe / blame
| Commit | Line | Data |
|---|---|---|
| 410c8acf | 1 | /* -*-c-*- |
| 2 | * | |
| b4e56668 | 3 | * $Id: util.c,v 1.3 2004/04/08 01:36:17 mdw Exp $ |
| 410c8acf | 4 | * |
| 5 | * Utilities for the client and the server | |
| 6 | * | |
| 7 | * (c) 2001 Straylight/Edgeware | |
| 8 | */ | |
| 9 | ||
| 10 | /*----- Licensing notice --------------------------------------------------* | |
| 11 | * | |
| 12 | * This file is part of Trivial IP Encryption (TrIPE). | |
| 13 | * | |
| 14 | * TrIPE is free software; you can redistribute it and/or modify | |
| 15 | * it under the terms of the GNU General Public License as published by | |
| 16 | * the Free Software Foundation; either version 2 of the License, or | |
| 17 | * (at your option) any later version. | |
| 18 | * | |
| 19 | * TrIPE is distributed in the hope that it will be useful, | |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 22 | * GNU General Public License for more details. | |
| 23 | * | |
| 24 | * You should have received a copy of the GNU General Public License | |
| 25 | * along with TrIPE; if not, write to the Free Software Foundation, | |
| 26 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| 27 | */ | |
| 28 | ||
| 410c8acf | 29 | /*----- Header files ------------------------------------------------------*/ |
| 30 | ||
| 31 | #include <errno.h> | |
| 32 | #include <stdio.h> | |
| 33 | #include <stdlib.h> | |
| 34 | #include <string.h> | |
| 35 | ||
| 36 | #include <sys/types.h> | |
| 37 | #include <unistd.h> | |
| 38 | #include <fcntl.h> | |
| 39 | ||
| 0ed0735f MW |
40 | #include <mLib/dstr.h> |
| 41 | ||
| 410c8acf | 42 | #include "util.h" |
| 43 | ||
| 44 | #include <sys/ioctl.h> | |
| 45 | ||
| 46 | /*----- Main code ---------------------------------------------------------*/ | |
| 47 | ||
| 0ed0735f MW |
48 | /* --- @u_quotify@ --- * |
| 49 | * | |
| 50 | * Arguments: @dstr *d@ = where to write the answer | |
| 51 | * @const char *p@ = string to quotify | |
| 52 | * | |
| 53 | * Returns: --- | |
| 54 | * | |
| 55 | * Use: Quotes the given string if necessary, according to our | |
| 56 | * quoting rules. | |
| 57 | */ | |
| 58 | ||
| 59 | void u_quotify(dstr *d, const char *p) | |
| 60 | { | |
| 61 | if (d->len) | |
| 62 | dstr_putc(d, ' '); | |
| 63 | if (*p && !p[strcspn(p, "\"' \t\n\v")]) | |
| 64 | dstr_puts(d, p); | |
| 65 | else { | |
| 66 | dstr_putc(d, '\"'); | |
| 67 | while (*p) { | |
| 68 | if (*p == '\\' || *p == '\"') | |
| 69 | dstr_putc(d, '\\'); | |
| 70 | dstr_putc(d, *p++); | |
| 71 | } | |
| 72 | dstr_putc(d, '\"'); | |
| 73 | } | |
| 74 | } | |
| 75 | ||
| b542dd0b | 76 | /* --- @u_detach@ --- * |
| 410c8acf | 77 | * |
| 78 | * Arguments: --- | |
| 79 | * | |
| b542dd0b | 80 | * Returns: --- |
| 410c8acf | 81 | * |
| b542dd0b | 82 | * Use: Detaches from the current terminal and ensures it can never |
| 83 | * acquire a new one. Calls @fork@. | |
| 410c8acf | 84 | */ |
| 85 | ||
| b542dd0b | 86 | void u_detach(void) |
| 410c8acf | 87 | { |
| 410c8acf | 88 | #ifdef TIOCNOTTY |
| 89 | { | |
| 90 | int fd; | |
| 91 | if ((fd = open("/dev/tty", O_RDONLY)) >= 0) { | |
| 92 | ioctl(fd, TIOCNOTTY); | |
| 93 | close(fd); | |
| 94 | } | |
| 95 | } | |
| 96 | #endif | |
| 97 | setsid(); | |
| 410c8acf | 98 | if (fork() > 0) |
| 99 | _exit(0); | |
| b542dd0b | 100 | } |
| 101 | ||
| 102 | /* --- @u_daemon@ --- * | |
| 103 | * | |
| 104 | * Arguments: --- | |
| 105 | * | |
| 106 | * Returns: Zero if OK, nonzero on failure. | |
| 107 | * | |
| 108 | * Use: Becomes a daemon. | |
| 109 | */ | |
| 110 | ||
| 111 | int u_daemon(void) | |
| 112 | { | |
| 113 | pid_t kid; | |
| 114 | ||
| 115 | if ((kid = fork()) < 0) | |
| 116 | return (-1); | |
| 117 | if (kid) | |
| 118 | _exit(0); | |
| 119 | u_detach(); | |
| 410c8acf | 120 | return (0); |
| 121 | } | |
| 122 | ||
| 123 | /*----- That's all, folks -------------------------------------------------*/ |