ustctl/scanning_functions.c

   1 /* Copyright (C) 2011  Ericsson AB, Nils Carlson <nils.carlson@ericsson.com>
   2  *
   3  * This library is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU Lesser General Public
   5  * License as published by the Free Software Foundation; either
   6  * version 2.1 of the License, or (at your option) any later version.
   7  *
   8  * This library is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * Lesser General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public
  14  * License along with this library; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  16  */
  17
  18 #define _GNU_SOURCE
  19 #include <stdio.h>
  20 #include <ust/ustctl.h>
  21 #include "usterr.h"
  22
  23
  24 int parse_and_connect_pid(const char *pid_string)
  25 {
  26         pid_t pid;
  27         int sock;
  28
  29         errno = 0;
  30         pid = strtoull(pid_string, NULL, 10);
  31         if (errno) {
  32                 perror("Failed to parse pid");
  33                 exit(EXIT_FAILURE);
  34         }
  35
  36         sock = ustctl_connect_pid(pid);
  37         if (sock < 0) {
  38                 perror("Failed to connect to process");
  39                 exit(EXIT_FAILURE);
  40         }
  41
  42         return sock;
  43 }
  44
  45 int scan_ch_marker(const char *channel_marker, char **channel, char **marker)
  46 {
  47         int result;
  48
  49         *channel = NULL;
  50         *marker = NULL;
  51
  52         result = sscanf(channel_marker, "%a[^/]/%as", channel, marker);
  53         if (result != 2) {
  54                 if (errno) {
  55                         PERROR("Failed to read channel and marker names");
  56                 } else {
  57                         ERR("Failed to parse marker and channel names");
  58                 }
  59                 if (*channel) {
  60                         free(*channel);
  61                 }
  62                 if (*marker) {
  63                         free(*marker);
  64                 }
  65                 return -1;
  66         }
  67
  68         return 0;
  69 }
  70
  71 int scan_ch_and_num(const char *ch_num, char **channel, unsigned int *num)
  72 {
  73         int result;
  74
  75         *channel = NULL;
  76
  77         result = sscanf(ch_num, "%a[^/]/%u", channel, num);
  78         if (result != 2) {
  79                 if (errno) {
  80                         PERROR("Failed to parse channel and number");
  81                 } else {
  82                         ERR("Failed to parse channel and number");
  83                 }
  84                 if (*channel) {
  85                         free(*channel);
  86                 }
  87                 return -1;
  88         }
  89
  90         return 0;
  91 }