| 1 | /* |
| 2 | * Dolda Connect - Modular multiuser Direct Connect-style client |
| 3 | * Copyright (C) 2007 Fredrik Tolf <fredrik@dolda2000.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | |
| 20 | #include <stdlib.h> |
| 21 | #include <stdio.h> |
| 22 | #include <unistd.h> |
| 23 | #include <string.h> |
| 24 | #include <pwd.h> |
| 25 | #include <libintl.h> |
| 26 | #include <signal.h> |
| 27 | |
| 28 | #ifdef HAVE_CONFIG_H |
| 29 | #include <config.h> |
| 30 | #endif |
| 31 | |
| 32 | int running(char *pf) |
| 33 | { |
| 34 | FILE *pfs; |
| 35 | char buf[1024]; |
| 36 | int pid; |
| 37 | |
| 38 | if((pfs = fopen(pf, "r")) == NULL) { |
| 39 | perror(pf); |
| 40 | return(0); |
| 41 | } |
| 42 | fgets(buf, sizeof(buf), pfs); |
| 43 | fclose(pfs); |
| 44 | if((pid = atoi(buf)) == 0) |
| 45 | return(0); |
| 46 | return(!kill(pid, 0)); |
| 47 | } |
| 48 | |
| 49 | int haveprogram(char *name) |
| 50 | { |
| 51 | char buf[1024]; |
| 52 | char *p, *p2; |
| 53 | |
| 54 | p = getenv("PATH"); |
| 55 | while(p != NULL) { |
| 56 | if((p2 = strchr(p, ':')) != NULL) { |
| 57 | memcpy(buf, p, p2 - p); |
| 58 | buf[p2 - p] = 0; |
| 59 | p = p2 + 1; |
| 60 | } else { |
| 61 | strcpy(buf, p); |
| 62 | p = NULL; |
| 63 | } |
| 64 | strcat(buf, "/"); |
| 65 | strcat(buf, name); |
| 66 | if(!access(buf, X_OK)) |
| 67 | return(1); |
| 68 | } |
| 69 | return(0); |
| 70 | } |
| 71 | |
| 72 | int main(int argc, char **argv) |
| 73 | { |
| 74 | int c; |
| 75 | char cf[1024], pf[1024]; |
| 76 | |
| 77 | while((c = getopt(argc, argv, "hV")) != -1) { |
| 78 | switch(c) { |
| 79 | case 'h': |
| 80 | printf("usage: dolcon-launch [-hV]\n"); |
| 81 | printf("\t-h\tDisplay this help message\n"); |
| 82 | printf("\t-V\tDisplay version info and exit\n"); |
| 83 | printf("\n"); |
| 84 | printf("\tIf $HOME/.doldacond.conf does not exist, dolcon-launch will run\n"); |
| 85 | printf("\tdolconf. Otherwise, if $HOME/.doldacond.pid does not exist,\n"); |
| 86 | printf("\tor does not contain a valid PID, dolcon-launch will run\n"); |
| 87 | printf("\tdoldacond-shell. Otherwise, dolcon-launch will run dolcon. All\n"); |
| 88 | printf("\tthese programs must be somewhere in $PATH for dolcon-launch to work.\n"); |
| 89 | printf("\n"); |
| 90 | printf("\tIf doldacond is not in $PATH, only running dolcon is attempted.\n"); |
| 91 | exit(0); |
| 92 | case 'V': |
| 93 | printf("%s", RELEASEINFO); |
| 94 | exit(0); |
| 95 | default: |
| 96 | fprintf(stderr, "usage: dolcon-launch [-h]\n"); |
| 97 | exit(1); |
| 98 | } |
| 99 | } |
| 100 | if(haveprogram("doldacond")) { |
| 101 | if(getenv("HOME") != NULL) |
| 102 | snprintf(cf, sizeof(cf), "%s/.doldacond.conf", getenv("HOME")); |
| 103 | else |
| 104 | snprintf(cf, sizeof(cf), "%s/.doldacond.conf", getpwuid(getuid())->pw_dir); |
| 105 | if(getenv("HOME") != NULL) |
| 106 | snprintf(pf, sizeof(pf), "%s/.doldacond.pid", getenv("HOME")); |
| 107 | else |
| 108 | snprintf(pf, sizeof(pf), "%s/.doldacond.pid", getpwuid(getuid())->pw_dir); |
| 109 | if(access(cf, F_OK)) { |
| 110 | execlp("dolconf", "dolconf", "-a", NULL); |
| 111 | perror("dolconf"); |
| 112 | } else if(access(pf, F_OK) || !running(pf)) { |
| 113 | execlp("doldacond-shell", "doldacond-shell", NULL); |
| 114 | perror("doldacond-shell"); |
| 115 | } else { |
| 116 | execlp("dolcon", "dolcon", "-l", NULL); |
| 117 | perror("dolcon"); |
| 118 | } |
| 119 | } else { |
| 120 | execlp("dolcon", "dolcon", NULL); |
| 121 | perror("dolcon"); |
| 122 | } |
| 123 | return(127); |
| 124 | } |