Wed, 05 Jun 2024 19:50:44 +0200
add extra nullptr check in the event loop to handle the case when the finish ptr is set to NULL after it was already scheduled
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1 | /* |
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2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. |
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3 | * |
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4 | * Copyright 2017 Olaf Wintermann. All rights reserved. |
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5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions are met: |
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8 | * |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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26 | * POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #include "srvctrlsocket.h" |
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30 | |
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31 | #include <stdio.h> |
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32 | #include <stdlib.h> |
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33 | #include <unistd.h> |
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34 | #include <string.h> |
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35 | #include <sys/socket.h> |
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36 | #include <sys/un.h> |
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37 | |
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38 | SrvConnection* srvctrl_connet(char *socketfile) { |
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39 | if(!socketfile) { |
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40 | fprintf(stderr, "srvctrl_connect: no socketfile\n"); |
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41 | return NULL; |
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42 | } |
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43 | size_t len = strlen(socketfile); |
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44 | if(len == 0) { |
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45 | fprintf(stderr, "srvctrl_connect: invalid socket path\n"); |
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46 | return NULL; |
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47 | } |
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48 | if(len > 100) { |
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49 | fprintf(stderr, "srvctrl_connect: socket path too long\n"); |
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50 | return NULL; |
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51 | } |
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52 | |
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53 | int fd = socket(AF_UNIX, SOCK_STREAM, 0); |
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54 | if(fd == -1) { |
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55 | perror("srvctrl_connect: cannot create socket"); |
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56 | return NULL; |
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57 | } |
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58 | |
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59 | struct sockaddr_un addr; |
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60 | memset(&addr, 0, sizeof(addr)); |
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61 | addr.sun_family = AF_UNIX; |
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62 | memcpy(addr.sun_path, socketfile, len); |
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63 | |
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64 | if(connect(fd, (struct sockaddr*)&addr, sizeof(addr))) { |
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65 | perror("srvctrl_connect"); |
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66 | close(fd); |
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67 | return NULL; |
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68 | } |
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69 | |
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70 | FILE *stream = fdopen(fd, "r+"); |
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71 | if(!stream) { |
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72 | close(fd); |
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73 | return NULL; |
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74 | } |
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75 | |
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76 | SrvConnection *conn = calloc(1, sizeof(SrvConnection)); |
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77 | conn->socket = fd; |
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78 | conn->stream = stream; |
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79 | |
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80 | return conn; |
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81 | } |
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82 | |
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83 | void srvctrl_close(SrvConnection *conn) { |
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84 | fclose(conn->stream); |
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85 | free(conn); |
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86 | } |
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87 | |
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88 | int srvctrl_readmsg(SrvConnection *conn, SrvMsg *msg) { |
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89 | int type = 0; |
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90 | uint16_t length; |
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91 | |
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92 | type = fgetc(conn->stream); |
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93 | if(type == EOF) { |
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94 | return 1; |
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95 | } |
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96 | |
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97 | if(fread(&length, 1, 2, conn->stream) != 2) { |
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98 | return -1; |
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99 | } |
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100 | |
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101 | msg->type = type; |
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102 | msg->length = length; |
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103 | msg->message = malloc(length); |
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104 | |
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105 | size_t r = fread(msg->message, 1, length, conn->stream); |
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106 | if(r != length) { |
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107 | free(msg->message); |
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108 | return -1; |
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109 | } |
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110 | |
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111 | return 0; |
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112 | } |