libpwmd/pwmc.c

   1 /* vim:tw=78:ts=8:sw=4:set ft=c:  */
   2 /*
   3     Copyright (C) 2007 Ben Kibbey <bjk@luxsci.net>
   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 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <err.h>
  23 #include <errno.h>
  24 #include <string.h>
  25 #include <libpwmd.h>
  26
  27 #ifdef HAVE_CONFIG_H
  28 #include <config.h>
  29 #endif
  30
  31 static void usage(const char *pn)
  32 {
  33     fprintf(stderr,
  34             "Usage: %s [-hv] [-E] [-s <socket>] [[-a] | [-p <password>]] [-S] <filename>\n"
  35             "   -E  exit after a command failure\n"
  36             "   -s  socket path\n"
  37             "   -p  password\n"
  38             "   -a  use gpg-agent\n"
  39             "   -S  send the SAVE command after all others\n"
  40             "   -v  version\n"
  41             "   -h  this help text\n",
  42             pn);
  43     exit(EXIT_FAILURE);
  44 }
  45
  46 static void pwmd_show_error(int ret, int error)
  47 {
  48     if (ret == PWMD_PERROR)
  49         fprintf(stderr, "ERR %03i %s\n", error, pwmd_strerror(error));
  50     else if (ret == PWMD_ERROR)
  51         fprintf(stderr, "ERR 000 %s\n", strerror(error));
  52     else
  53         fprintf(stderr, "ERR 000 Is gpg-agent running? Is GPG_AGENT_INFO set?\n");
  54 }
  55
  56 int main(int argc, char *argv[])
  57 {
  58     int opt;
  59     int use_agent = 0;
  60     char *password = NULL;
  61     char *filename = NULL;
  62     char *socketpath = NULL;
  63     char command[8196], *p;
  64     int ret, error;
  65     pwm_t *pwm;
  66     char *result = NULL;
  67     int save = 0;
  68     char *buf = NULL;
  69     int total = 0;
  70     int do_exit = 0;
  71
  72     while ((opt = getopt(argc, argv, "Ehvap:s:S")) != EOF) {
  73         switch (opt) {
  74             case 'E':
  75                 do_exit = 1;
  76                 break;
  77             case 'S':
  78                 save = 1;
  79                 break;
  80             case 's':
  81                 socketpath = strdup(optarg);
  82                 break;
  83             case 'p':
  84                 password = strdup(optarg);
  85                 break;
  86             case 'a':
  87                 use_agent = 1;
  88                 break;
  89             case 'v':
  90                 printf("%s (pwmc)\n%s\n", PACKAGE_STRING, PACKAGE_BUGREPORT);
  91                 exit(EXIT_SUCCESS);
  92             case 'h':
  93             default:
  94                 usage(argv[0]);
  95         }
  96     }
  97
  98     if (use_agent && password)
  99         usage(argv[0]);
 100
 101     if (argc - optind != 1)
 102         usage(argv[0]);
 103
 104     filename = argv[optind];
 105
 106     if ((pwm = pwmd_connect(socketpath, &error)) == NULL) {
 107         errno = error;
 108
 109         if (password) {
 110             memset(password, 0, strlen(password));
 111             free(password);
 112         }
 113
 114         err(EXIT_FAILURE, "pwmd_connect()");
 115     }
 116
 117     if (use_agent) {
 118         if ((ret = pwmd_command(pwm, &result, &error, PWMD_SETOPT, PWMD_OPTION_USEAGENT, 1))
 119                 != PWMD_OK) {
 120             pwmd_show_error(ret, error);
 121             pwmd_close(pwm);
 122             exit(EXIT_FAILURE);
 123         }
 124     }
 125     else if (password) {
 126         if ((ret = pwmd_command(pwm, &result, &error, PWMD_SETOPT,
 127                         PWMD_OPTION_PASSWORD, password)) != PWMD_OK) {
 128             memset(password, 0, strlen(password));
 129             free(password);
 130             pwmd_show_error(ret, error);
 131             pwmd_close(pwm);
 132             exit(EXIT_FAILURE);
 133         }
 134
 135         memset(password, 0, strlen(password));
 136         free(password);
 137     }
 138
 139     if ((ret = pwmd_command(pwm, &result, &error, PWMD_OPEN, filename)) != PWMD_OK) {
 140         pwmd_show_error(ret, error);
 141         pwmd_close(pwm);
 142         exit(EXIT_FAILURE);
 143     }
 144
 145     while ((p = fgets(command, sizeof(command), stdin)) != NULL) {
 146         int len = strlen(p);
 147         char *t;
 148
 149         if (p[len - 1] != '\n') {
 150             if ((t = realloc(buf, (total + len + 1) * sizeof(char))) == NULL) {
 151                 if (buf) {
 152                     memset(buf, 0, total);
 153                     free(buf);
 154                 }
 155
 156                 err(EXIT_FAILURE, "realloc()");
 157             }
 158
 159             buf = t;
 160             memcpy(&buf[total], p, len);
 161             total += len;
 162             buf[total] = 0;
 163             continue;
 164         }
 165         else {
 166             if (buf) {
 167                 if ((t = realloc(buf, (total + len + 1) * sizeof(char))) == NULL) {
 168                     if (buf) {
 169                         memset(buf, 0, total);
 170                         free(buf);
 171                     }
 172
 173                     err(EXIT_FAILURE, "realloc()");
 174                 }
 175
 176                 buf = t;
 177                 memcpy(&buf[total], p, len);
 178                 total += len;
 179                 buf[total] = 0;
 180             }
 181         }
 182
 183         if ((ret = pwmd_command(pwm, &result, &error, PWMD_COMMAND,
 184                         (buf) ? buf : command)) != PWMD_OK) {
 185             if (buf) {
 186                 memset(buf, 0, total);
 187                 free(buf);
 188             }
 189
 190             memset(&command, 0, sizeof(command));
 191             pwmd_show_error(ret, error);
 192
 193             if (do_exit) {
 194                 pwmd_close(pwm);
 195                 exit(EXIT_FAILURE);
 196             }
 197         }
 198
 199         if (buf) {
 200             memset(buf, 0, total);
 201             free(buf);
 202             buf = NULL;
 203             total = 0;
 204         }
 205
 206         if (result) {
 207             printf("%s\n", (char *)result);
 208             free(result);
 209         }
 210     }
 211
 212     if (save) {
 213         if ((ret = pwmd_command(pwm, &result, &error, PWMD_SAVE)) != PWMD_OK) {
 214             memset(&command, 0, sizeof(command));
 215             pwmd_show_error(ret, error);
 216             pwmd_close(pwm);
 217             exit(EXIT_FAILURE);
 218         }
 219     }
 220
 221     pwmd_close(pwm);
 222
 223     if (socketpath)
 224         free(socketpath);
 225
 226     exit(EXIT_SUCCESS);
 227 }