[dd74e612] | 1 | /* |
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| 2 | * |
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| 3 | * Instantatiate a new terminal shell. |
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| 4 | * |
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| 5 | * Author: |
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| 6 | * |
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| 7 | * WORK: fernando.ruiz@ctv.es |
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| 8 | * HOME: correo@fernando-ruiz.com |
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| 9 | * |
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| 10 | * Thanks at: |
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| 11 | * Chris John |
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| 12 | * |
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| 13 | * $Id$ |
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| 14 | */ |
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[b2712e3] | 15 | #ifdef HAVE_CONFIG_H |
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| 16 | #include "config.h" |
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| 17 | #endif |
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[dd74e612] | 18 | |
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| 19 | #include <stdio.h> |
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[84206479] | 20 | #include <time.h> |
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[dd74e612] | 21 | |
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| 22 | #include <rtems.h> |
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| 23 | #include <rtems/error.h> |
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| 24 | #include <rtems/libio.h> |
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| 25 | #include <rtems/libio_.h> |
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[b2712e3] | 26 | #include <rtems/system.h> |
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| 27 | #include <rtems/shell.h> |
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[dd74e612] | 28 | |
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| 29 | #include <termios.h> |
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| 30 | #include <string.h> |
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| 31 | #include <stdlib.h> |
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| 32 | #include <ctype.h> |
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[70d689a] | 33 | #include <sys/stat.h> |
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[dd74e612] | 34 | #include <unistd.h> |
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| 35 | #include <errno.h> |
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[b2712e3] | 36 | #include <pwd.h> |
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[dd74e612] | 37 | |
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| 38 | /* ----------------------------------------------- * |
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| 39 | * This is a stupidity but is cute. |
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| 40 | * ----------------------------------------------- */ |
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| 41 | rtems_unsigned32 new_rtems_name(char * rtems_name) { |
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| 42 | static char b[5]; |
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| 43 | sprintf(b,"%-4.4s",rtems_name); |
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| 44 | return rtems_build_name(b[0],b[1],b[2],b[3]); |
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| 45 | } |
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| 46 | /* ************************************************************** |
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| 47 | * common linked list of shell commands. |
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| 48 | * Because the help report is very long |
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| 49 | * I have a topic for each command. |
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| 50 | * Help list the topics |
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| 51 | * help [topic] list the commands for the topic |
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| 52 | * help [command] help for the command |
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| 53 | * Can you see help rtems monitor report? |
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| 54 | * ************************************************************** */ |
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| 55 | |
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| 56 | struct shell_topic_tt; |
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| 57 | typedef struct shell_topic_tt shell_topic_t; |
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| 58 | |
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| 59 | struct shell_topic_tt { |
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| 60 | char * topic; |
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| 61 | shell_topic_t * next; |
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| 62 | }; |
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| 63 | |
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| 64 | |
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| 65 | static shell_cmd_t * shell_first_cmd; |
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| 66 | static shell_topic_t * shell_first_topic; |
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| 67 | /* ----------------------------------------------- * |
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| 68 | * Using Chain I can reuse the rtems code. |
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| 69 | * I am more comfortable with this, sorry. |
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| 70 | * ----------------------------------------------- */ |
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| 71 | shell_topic_t * shell_lookup_topic(char * topic) { |
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| 72 | shell_topic_t * shell_topic; |
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| 73 | shell_topic=shell_first_topic; |
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| 74 | while (shell_topic) { |
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| 75 | if (!strcmp(shell_topic->topic,topic)) return shell_topic; |
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| 76 | shell_topic=shell_topic->next; |
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| 77 | }; |
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| 78 | return (shell_topic_t *) NULL; |
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| 79 | } |
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| 80 | /* ----------------------------------------------- */ |
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| 81 | shell_topic_t * shell_add_topic(char * topic) { |
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| 82 | shell_topic_t * current,*aux; |
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| 83 | if (!shell_first_topic) { |
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| 84 | aux=malloc(sizeof(shell_topic_t)); |
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| 85 | aux->topic=topic; |
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| 86 | aux->next=(shell_topic_t*)NULL; |
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| 87 | return shell_first_topic=aux; |
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| 88 | } else { |
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| 89 | current=shell_first_topic; |
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| 90 | if (!strcmp(topic,current->topic)) return current; |
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| 91 | while (current->next) { |
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| 92 | if (!strcmp(topic,current->next->topic)) return current->next; |
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| 93 | current=current->next; |
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| 94 | }; |
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| 95 | aux=malloc(sizeof(shell_topic_t)); |
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| 96 | aux->topic=topic; |
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| 97 | aux->next=(shell_topic_t*)NULL; |
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| 98 | current->next=aux; |
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| 99 | return aux; |
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| 100 | }; |
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| 101 | } |
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| 102 | /* ----------------------------------------------- */ |
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| 103 | shell_cmd_t * shell_lookup_cmd(char * cmd) { |
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| 104 | shell_cmd_t * shell_cmd; |
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| 105 | shell_cmd=shell_first_cmd; |
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| 106 | while (shell_cmd) { |
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| 107 | if (!strcmp(shell_cmd->name,cmd)) return shell_cmd; |
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| 108 | shell_cmd=shell_cmd->next; |
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| 109 | }; |
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| 110 | return (shell_cmd_t *) NULL; |
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| 111 | } |
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| 112 | /* ----------------------------------------------- */ |
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| 113 | shell_cmd_t * shell_add_cmd(char * cmd, |
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| 114 | char * topic, |
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| 115 | char * usage, |
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| 116 | shell_command_t command) { |
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| 117 | int shell_help(int argc,char * argv[]); |
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| 118 | shell_cmd_t * shell_cmd,*shell_pvt; |
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| 119 | if (!shell_first_cmd) { |
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| 120 | shell_first_cmd=(shell_cmd_t *) malloc(sizeof(shell_cmd_t)); |
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| 121 | shell_first_cmd->name ="help"; |
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| 122 | shell_first_cmd->topic ="help"; |
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| 123 | shell_first_cmd->usage ="help [topic] # list of usage of commands"; |
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| 124 | shell_first_cmd->command=shell_help; |
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| 125 | shell_first_cmd->alias =(shell_cmd_t *) NULL; |
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| 126 | shell_first_cmd->next =(shell_cmd_t *) NULL; |
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| 127 | shell_add_topic(shell_first_cmd->topic); |
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| 128 | register_cmds(); |
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| 129 | }; |
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| 130 | if (!cmd) return (shell_cmd_t *) NULL; |
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| 131 | if (!command) return (shell_cmd_t *) NULL; |
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| 132 | shell_cmd=(shell_cmd_t *) malloc(sizeof(shell_cmd_t)); |
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| 133 | shell_cmd->name =cmd; |
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| 134 | shell_cmd->topic =topic; |
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| 135 | shell_cmd->usage =usage; |
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| 136 | shell_cmd->command=command; |
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| 137 | shell_cmd->alias =(shell_cmd_t *) NULL; |
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| 138 | shell_cmd->next =(shell_cmd_t *) NULL; |
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| 139 | shell_add_topic(shell_cmd->topic); |
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| 140 | shell_pvt=shell_first_cmd; |
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| 141 | while (shell_pvt->next) shell_pvt=shell_pvt->next; |
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| 142 | return shell_pvt->next=shell_cmd; |
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| 143 | } |
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| 144 | /* ----------------------------------------------- * |
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| 145 | * you can make an alias for every command. |
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| 146 | * ----------------------------------------------- */ |
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| 147 | shell_cmd_t * shell_alias_cmd(char * cmd, char * alias) { |
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| 148 | shell_cmd_t * shell_cmd,* shell_aux; |
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| 149 | shell_aux=(shell_cmd_t *) NULL; |
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| 150 | if (alias) { |
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| 151 | if ((shell_aux=shell_lookup_cmd(alias))!=NULL) { |
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| 152 | return NULL; |
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| 153 | }; |
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| 154 | if ((shell_cmd=shell_lookup_cmd(cmd))!=NULL) { |
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| 155 | shell_aux=shell_add_cmd(alias,shell_cmd->topic, |
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| 156 | shell_cmd->usage,shell_cmd->command); |
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| 157 | if (shell_aux) shell_aux->alias=shell_cmd; |
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| 158 | }; |
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| 159 | }; |
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| 160 | return shell_aux; |
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| 161 | } |
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| 162 | /* ----------------------------------------------- * |
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| 163 | * Poor but enough.. |
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| 164 | * TODO: Redirection capture. "" evaluate, ... C&S welcome. |
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| 165 | * ----------------------------------------------- */ |
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| 166 | int shell_make_args(char * cmd, |
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| 167 | int * pargc, |
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| 168 | char * argv[]) { |
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| 169 | int argc=0; |
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| 170 | while ((cmd=strtok(cmd," \t\r\n"))!=NULL) { |
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| 171 | argv[argc++]=cmd; |
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| 172 | cmd=(char*)NULL; |
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| 173 | }; |
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| 174 | argv[argc]=(char*)NULL; |
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| 175 | return *pargc=argc; |
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| 176 | } |
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| 177 | /* ----------------------------------------------- * |
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| 178 | * show the help for one command. |
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| 179 | * ----------------------------------------------- */ |
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| 180 | int shell_help_cmd(shell_cmd_t * shell_cmd) { |
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| 181 | char * pc; |
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| 182 | int col,line; |
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| 183 | printf("%-10.10s -",shell_cmd->name); |
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| 184 | col=12; |
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| 185 | line=1; |
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| 186 | if (shell_cmd->alias) { |
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| 187 | printf("is an <alias> for command '%s'",shell_cmd->alias->name); |
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| 188 | } else |
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| 189 | if (shell_cmd->usage) { |
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| 190 | pc=shell_cmd->usage; |
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| 191 | while (*pc) { |
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| 192 | switch(*pc) { |
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| 193 | case '\r':break; |
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| 194 | case '\n':putchar('\n'); |
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| 195 | col=0; |
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| 196 | break; |
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| 197 | default :putchar(*pc); |
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| 198 | col++; |
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| 199 | break; |
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| 200 | }; |
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| 201 | pc++; |
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| 202 | if(col>78) { /* What daring... 78?*/ |
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| 203 | if (*pc) { |
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| 204 | putchar('\n'); |
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| 205 | col=0; |
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| 206 | }; |
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| 207 | }; |
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| 208 | if (!col && *pc) { |
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| 209 | printf(" "); |
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| 210 | col=12;line++; |
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| 211 | }; |
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| 212 | }; |
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| 213 | }; |
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| 214 | puts(""); |
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| 215 | return line; |
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| 216 | } |
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| 217 | /* ----------------------------------------------- * |
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| 218 | * show the help. The first command implemented. |
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| 219 | * Can you see the header of routine? Known? |
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| 220 | * The same with all the commands.... |
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| 221 | * ----------------------------------------------- */ |
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| 222 | int shell_help(int argc,char * argv[]) { |
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| 223 | int col,line,arg; |
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| 224 | shell_topic_t *topic; |
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| 225 | shell_cmd_t * shell_cmd=shell_first_cmd; |
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| 226 | if (argc<2) { |
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[70d689a] | 227 | printf("help: ('r' repeat last cmd - 'e' edit last cmd)\n" |
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| 228 | " TOPIC? The topics are\n"); |
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[dd74e612] | 229 | topic=shell_first_topic; |
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| 230 | col=0; |
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| 231 | while (topic) { |
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| 232 | if (!col){ |
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| 233 | col=printf(" %s",topic->topic); |
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| 234 | } else { |
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| 235 | if ((col+strlen(topic->topic)+2)>78){ |
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| 236 | printf("\n"); |
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| 237 | col=printf(" %s",topic->topic); |
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| 238 | } else { |
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| 239 | col+=printf(", %s",topic->topic); |
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| 240 | }; |
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| 241 | }; |
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| 242 | topic=topic->next; |
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| 243 | }; |
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| 244 | printf("\n"); |
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| 245 | return 1; |
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| 246 | }; |
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| 247 | line=0; |
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| 248 | for (arg=1;arg<argc;arg++) { |
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| 249 | if (line>16) { |
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| 250 | printf("Press any key to continue...");getchar(); |
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| 251 | printf("\n"); |
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| 252 | line=0; |
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| 253 | }; |
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| 254 | topic=shell_lookup_topic(argv[arg]); |
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| 255 | if (!topic){ |
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| 256 | if ((shell_cmd=shell_lookup_cmd(argv[arg]))==NULL) { |
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| 257 | printf("help: topic or cmd '%s' not found. Try <help> alone for a list\n",argv[arg]); |
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| 258 | line++; |
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| 259 | } else { |
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| 260 | line+=shell_help_cmd(shell_cmd); |
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| 261 | } |
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| 262 | continue; |
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| 263 | }; |
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| 264 | printf("help: list for the topic '%s'\n",argv[arg]); |
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| 265 | line++; |
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| 266 | while (shell_cmd) { |
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| 267 | if (!strcmp(topic->topic,shell_cmd->topic)) |
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| 268 | line+=shell_help_cmd(shell_cmd); |
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| 269 | if (line>16) { |
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| 270 | printf("Press any key to continue...");getchar(); |
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| 271 | printf("\n"); |
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| 272 | line=0; |
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| 273 | }; |
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| 274 | shell_cmd=shell_cmd->next; |
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| 275 | }; |
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| 276 | }; |
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| 277 | puts(""); |
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| 278 | return 0; |
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| 279 | } |
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| 280 | /* ----------------------------------------------- * |
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[70d689a] | 281 | * TODO: Add improvements. History, edit vi or emacs, ... |
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[dd74e612] | 282 | * ----------------------------------------------- */ |
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| 283 | int shell_scanline(char * line,int size,FILE * in,FILE * out) { |
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| 284 | int c,col; |
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| 285 | col=0; |
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[70d689a] | 286 | if (*line) { |
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| 287 | col=strlen(line); |
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| 288 | if (out) fprintf(out,"%s",line); |
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| 289 | }; |
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| 290 | tcdrain(fileno(in )); |
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[130291f] | 291 | if (out) tcdrain(fileno(out)); |
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[dd74e612] | 292 | for (;;) { |
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| 293 | line[col]=0; |
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| 294 | c=fgetc(in); |
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| 295 | switch (c) { |
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[b2712e3] | 296 | case 0x04:/*Control-d*/ |
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| 297 | if (col) break; |
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[dd74e612] | 298 | case EOF :return 0; |
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[b2712e3] | 299 | case '\n':break; |
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| 300 | case '\f':if (out) fputc('\f',out); |
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| 301 | case 0x03:/*Control-C*/ |
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| 302 | line[0]=0; |
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[dd74e612] | 303 | case '\r':if (out) fputc('\n',out); |
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| 304 | return 1; |
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[b2712e3] | 305 | case 127: |
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[dd74e612] | 306 | case '\b':if (col) { |
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| 307 | if (out) { |
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| 308 | fputc('\b',out); |
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| 309 | fputc(' ',out); |
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| 310 | fputc('\b',out); |
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| 311 | }; |
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| 312 | col--; |
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| 313 | } else { |
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| 314 | if (out) fputc('\a',out); |
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| 315 | }; |
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| 316 | break; |
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| 317 | default :if (!iscntrl(c)) { |
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| 318 | if (col<size-1) { |
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| 319 | line[col++]=c; |
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| 320 | if (out) fputc(c,out); |
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| 321 | } else { |
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| 322 | if (out) fputc('\a',out); |
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| 323 | }; |
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| 324 | } else { |
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[b2712e3] | 325 | if (out) |
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| 326 | if (c=='\a') fputc('\a',out); |
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[dd74e612] | 327 | }; |
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| 328 | break; |
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| 329 | }; |
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| 330 | }; |
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| 331 | } |
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| 332 | /* ----------------------------------------------- * |
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| 333 | * - The shell TASK |
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| 334 | * Poor but enough.. |
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| 335 | * TODO: Redirection. Tty Signals. ENVVARs. Shell language. |
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| 336 | * ----------------------------------------------- */ |
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| 337 | shell_env_t global_shell_env , |
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| 338 | * current_shell_env=&global_shell_env; |
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| 339 | |
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| 340 | extern char **environ; |
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| 341 | |
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[b2712e3] | 342 | void cat_file(FILE * out,char * name) { |
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| 343 | FILE * fd; |
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| 344 | int c; |
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| 345 | if (out) { |
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| 346 | fd=fopen(name,"r"); |
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| 347 | if (fd) { |
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| 348 | while ((c=fgetc(fd))!=EOF) fputc(c,out); |
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| 349 | fclose(fd); |
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| 350 | }; |
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| 351 | }; |
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| 352 | } |
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| 353 | |
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[70d689a] | 354 | void write_file(char * name,char * content) { |
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| 355 | FILE * fd; |
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| 356 | fd=fopen(name,"w"); |
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| 357 | if (fd) { |
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| 358 | fwrite(content,1,strlen(content),fd); |
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| 359 | fclose(fd); |
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| 360 | }; |
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| 361 | } |
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| 362 | |
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| 363 | void init_issue(void) { |
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| 364 | static char issue_inited=FALSE; |
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| 365 | struct stat buf; |
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| 366 | if (issue_inited) return; |
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| 367 | issue_inited=TRUE; |
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| 368 | getpwnam("root"); /* dummy call to init /etc dir */ |
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| 369 | if (stat("/etc/issue",&buf)) |
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| 370 | write_file("/etc/issue", |
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| 371 | "Welcome to @V\\n" |
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| 372 | "Login into @S(@L)\\n"); |
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| 373 | if (stat("/etc/issue.net",&buf)) |
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| 374 | write_file("/etc/issue.net", |
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| 375 | "Welcome to %v\n" |
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| 376 | "running on %m\n"); |
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| 377 | } |
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| 378 | |
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[b2712e3] | 379 | int shell_login(FILE * in,FILE * out) { |
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| 380 | FILE * fd; |
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| 381 | int c; |
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| 382 | time_t t; |
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| 383 | int times; |
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| 384 | char name[128]; |
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| 385 | char pass[128]; |
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| 386 | struct passwd * passwd; |
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[70d689a] | 387 | init_issue(); |
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[b2712e3] | 388 | setuid(0); |
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| 389 | setgid(0); |
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| 390 | rtems_current_user_env->euid= |
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| 391 | rtems_current_user_env->egid=0; |
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| 392 | if (out) { |
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| 393 | if((current_shell_env->devname[5]!='p')|| |
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| 394 | (current_shell_env->devname[6]!='t')|| |
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| 395 | (current_shell_env->devname[7]!='y')) { |
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[70d689a] | 396 | fd=fopen("/etc/issue","r"); |
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| 397 | if (fd) { |
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| 398 | while ((c=fgetc(fd))!=EOF) { |
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| 399 | if (c=='@') { |
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| 400 | switch(c=fgetc(fd)) { |
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| 401 | case 'L':fprintf(out,"%s",current_shell_env->devname); |
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| 402 | break; |
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| 403 | case 'B':fprintf(out,"0"); |
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| 404 | break; |
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| 405 | case 'T': |
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| 406 | case 'D':time(&t); |
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| 407 | fprintf(out,"%s",ctime(&t)); |
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| 408 | break; |
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| 409 | case 'S':fprintf(out,"RTEMS"); |
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| 410 | break; |
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| 411 | case 'V':fprintf(out,"%s\n%s",_RTEMS_version,_Copyright_Notice); |
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| 412 | break; |
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| 413 | case '@':fprintf(out,"@"); |
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| 414 | break; |
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| 415 | default :fprintf(out,"@%c",c); |
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| 416 | break; |
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| 417 | }; |
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| 418 | } else |
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| 419 | if (c=='\\') { |
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| 420 | switch(c=fgetc(fd)) { |
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| 421 | case '\\':fprintf(out,"\\"); |
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| 422 | break; |
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| 423 | case 'b':fprintf(out,"\b"); break; |
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| 424 | case 'f':fprintf(out,"\f"); break; |
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| 425 | case 'n':fprintf(out,"\n"); break; |
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| 426 | case 'r':fprintf(out,"\r"); break; |
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| 427 | case 's':fprintf(out," "); break; |
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| 428 | case 't':fprintf(out,"\t"); break; |
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| 429 | case '@':fprintf(out,"@"); break; |
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| 430 | }; |
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| 431 | } else { |
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| 432 | fputc(c,out); |
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| 433 | }; |
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| 434 | }; |
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| 435 | fclose(fd); |
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| 436 | } |
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[b2712e3] | 437 | } else { |
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| 438 | fd=fopen("/etc/issue.net","r"); |
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| 439 | if (fd) { |
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| 440 | while ((c=fgetc(fd))!=EOF) { |
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| 441 | if (c=='%') { |
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| 442 | switch(c=fgetc(fd)) { |
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| 443 | case 't':fprintf(out,"%s",current_shell_env->devname); |
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| 444 | break; |
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| 445 | case 'h':fprintf(out,"0"); |
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| 446 | break; |
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| 447 | case 'D':fprintf(out," "); |
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| 448 | break; |
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| 449 | case 'd':time(&t); |
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| 450 | fprintf(out,"%s",ctime(&t)); |
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| 451 | break; |
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| 452 | case 's':fprintf(out,"RTEMS"); |
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| 453 | break; |
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| 454 | case 'm':fprintf(out,"(" CPU_NAME "/" CPU_MODEL_NAME ")"); |
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| 455 | break; |
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| 456 | case 'r':fprintf(out,_RTEMS_version); |
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| 457 | break; |
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| 458 | case 'v':fprintf(out,"%s\n%s",_RTEMS_version,_Copyright_Notice); |
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| 459 | break; |
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| 460 | case '%':fprintf(out,"%%"); |
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| 461 | break; |
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| 462 | default :fprintf(out,"%%%c",c); |
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| 463 | break; |
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| 464 | }; |
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| 465 | } else { |
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| 466 | fputc(c,out); |
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| 467 | }; |
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| 468 | }; |
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| 469 | fclose(fd); |
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| 470 | } |
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| 471 | }; |
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| 472 | }; |
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| 473 | times=0; |
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[70d689a] | 474 | strcpy(name,""); |
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| 475 | strcpy(pass,""); |
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[b2712e3] | 476 | for (;;) { |
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| 477 | times++; |
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| 478 | if (times>3) break; |
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| 479 | if (out) fprintf(out,"\nlogin: "); |
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| 480 | if (!shell_scanline(name,sizeof(name),in,out )) break; |
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| 481 | if (out) fprintf(out,"Password: "); |
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| 482 | if (!shell_scanline(pass,sizeof(pass),in,NULL)) break; |
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| 483 | if (out) fprintf(out,"\n"); |
---|
| 484 | if ((passwd=getpwnam(name))) { |
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[70d689a] | 485 | if (strcmp(passwd->pw_passwd,"!")) { /* valid user */ |
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| 486 | setuid(passwd->pw_uid); |
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| 487 | setgid(passwd->pw_gid); |
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| 488 | rtems_current_user_env->euid= |
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| 489 | rtems_current_user_env->egid=0; |
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| 490 | chown(current_shell_env->devname,passwd->pw_uid,0); |
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| 491 | rtems_current_user_env->euid=passwd->pw_uid; |
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| 492 | rtems_current_user_env->egid=passwd->pw_gid; |
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| 493 | if (!strcmp(passwd->pw_passwd,"*")) { |
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| 494 | /* /etc/shadow */ |
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| 495 | return 0; |
---|
| 496 | } else { |
---|
| 497 | /* crypt() */ |
---|
| 498 | return 0; |
---|
| 499 | }; |
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[b2712e3] | 500 | }; |
---|
| 501 | }; |
---|
| 502 | if (out) fprintf(out,"Login incorrect\n"); |
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[70d689a] | 503 | strcpy(name,""); |
---|
| 504 | strcpy(pass,""); |
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[b2712e3] | 505 | }; |
---|
| 506 | return -1; |
---|
| 507 | } |
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| 508 | |
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[dd74e612] | 509 | rtems_task shell_shell(rtems_task_argument task_argument) { |
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| 510 | |
---|
| 511 | shell_env_t * shell_env =(shell_env_t*) task_argument; |
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| 512 | shell_cmd_t * shell_cmd; |
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| 513 | |
---|
| 514 | rtems_status_code sc; |
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| 515 | |
---|
| 516 | struct termios term; |
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| 517 | char * devname; |
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| 518 | |
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[b2712e3] | 519 | char curdir[256]; |
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[dd74e612] | 520 | char cmd[256]; |
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| 521 | char last_cmd[256]; /* to repeat 'r' */ |
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| 522 | int argc; |
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| 523 | char * argv[128]; |
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| 524 | |
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[b2712e3] | 525 | sc=rtems_task_variable_add(RTEMS_SELF,(void*)¤t_shell_env,free); |
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[dd74e612] | 526 | if (sc!=RTEMS_SUCCESSFUL) { |
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[b2712e3] | 527 | rtems_error(sc,"rtems_task_variable_add(current_shell_env):"); |
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[dd74e612] | 528 | rtems_task_delete(RTEMS_SELF); |
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| 529 | }; |
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| 530 | |
---|
[b2712e3] | 531 | current_shell_env=shell_env; |
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| 532 | |
---|
| 533 | sc=rtems_libio_set_private_env(); |
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[dd74e612] | 534 | if (sc!=RTEMS_SUCCESSFUL) { |
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[b2712e3] | 535 | rtems_error(sc,"rtems_libio_set_private_env():"); |
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[dd74e612] | 536 | rtems_task_delete(RTEMS_SELF); |
---|
| 537 | }; |
---|
| 538 | |
---|
| 539 | |
---|
| 540 | devname=shell_env->devname; |
---|
[b2712e3] | 541 | setuid(0); |
---|
| 542 | setgid(0); |
---|
| 543 | rtems_current_user_env->euid= |
---|
| 544 | rtems_current_user_env->egid=0; |
---|
[dd74e612] | 545 | |
---|
| 546 | stdin =fopen(devname,"r+"); |
---|
| 547 | |
---|
| 548 | if (!stdin) { |
---|
| 549 | fprintf(stderr,"shell:unable to open stdin.%s:%s\n",devname,strerror(errno)); |
---|
| 550 | rtems_task_delete(RTEMS_SELF); |
---|
| 551 | }; |
---|
| 552 | setvbuf(stdin,NULL,_IONBF,0); /* Not buffered*/ |
---|
| 553 | /* make a raw terminal,Linux MANuals */ |
---|
| 554 | if (tcgetattr (fileno(stdin), &term)>=0) { |
---|
| 555 | term.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON); |
---|
| 556 | term.c_oflag &= ~OPOST; |
---|
[b2712e3] | 557 | term.c_oflag |= (OPOST|ONLCR); /* But with cr+nl on output */ |
---|
[dd74e612] | 558 | term.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN); |
---|
| 559 | term.c_cflag = CLOCAL | CREAD |(shell_env->tcflag); |
---|
| 560 | term.c_cc[VMIN] = 1; |
---|
| 561 | term.c_cc[VTIME] = 0; |
---|
| 562 | if (tcsetattr (fileno(stdin), TCSADRAIN, &term) < 0) { |
---|
| 563 | fprintf(stderr,"shell:cannot set terminal attributes(%s)\n",devname); |
---|
| 564 | }; |
---|
| 565 | stdout=fopen(devname,"r+"); |
---|
| 566 | if (!stdout) { |
---|
| 567 | fprintf(stderr,"shell:unable to open stdout.%s:%s\n",devname,strerror(errno)); |
---|
| 568 | }; |
---|
[70d689a] | 569 | setvbuf(stdout,NULL,_IONBF,0); /* Not buffered*/ |
---|
[dd74e612] | 570 | stderr=fopen(devname,"r+"); |
---|
| 571 | if (!stderr) { |
---|
| 572 | printf("shell:unable to open stderr.%s:%s\n",devname,strerror(errno)); |
---|
| 573 | }; |
---|
| 574 | /* when the future user environment runs ok |
---|
| 575 | * a freopen() reopens the terminals. Now this don't work |
---|
| 576 | * (sorry but you can't use because FILENO_STDIN!=0. Better fileno(stdin)) |
---|
| 577 | */ |
---|
| 578 | }; |
---|
| 579 | shell_add_cmd(NULL,NULL,NULL,NULL); /* init the chain list*/ |
---|
[b2712e3] | 580 | do { |
---|
[70d689a] | 581 | /* Set again root user and root filesystem, side effect of set_priv..*/ |
---|
| 582 | sc=rtems_libio_set_private_env(); |
---|
| 583 | if (sc!=RTEMS_SUCCESSFUL) { |
---|
| 584 | rtems_error(sc,"rtems_libio_set_private_env():"); |
---|
| 585 | rtems_task_delete(RTEMS_SELF); |
---|
| 586 | }; |
---|
[b2712e3] | 587 | if (!shell_login(stdin,stdout)) { |
---|
| 588 | cat_file(stdout,"/etc/motd"); |
---|
| 589 | strcpy(last_cmd,""); |
---|
| 590 | strcpy(cmd,""); |
---|
| 591 | printf("\n" |
---|
[70d689a] | 592 | "RTEMS SHELL (Ver.1.0-FRC):%s. "__DATE__". 'help' to list commands.\n",devname); |
---|
| 593 | chdir("/"); /* XXX: chdir to getpwent homedir */ |
---|
[b2712e3] | 594 | shell_env->exit_shell=FALSE; |
---|
| 595 | for (;;) { |
---|
| 596 | /* Prompt section */ |
---|
| 597 | /* XXX: show_prompt user adjustable */ |
---|
| 598 | getcwd(curdir,sizeof(curdir)); |
---|
| 599 | printf("%s [%s] %c ",shell_env->taskname,curdir,geteuid()?'$':'#'); |
---|
| 600 | /* getcmd section */ |
---|
| 601 | if (!shell_scanline(cmd,sizeof(cmd),stdin,stdout)) break; /*EOF*/ |
---|
| 602 | /* evaluate cmd section */ |
---|
[70d689a] | 603 | if (!strcmp(cmd,"e")) { /* edit last command */ |
---|
| 604 | strcpy(cmd,last_cmd); |
---|
| 605 | continue; |
---|
| 606 | } else |
---|
| 607 | if (!strcmp(cmd,"r")) { /* repeat last command */ |
---|
[b2712e3] | 608 | strcpy(cmd,last_cmd); |
---|
| 609 | } else |
---|
| 610 | if (strcmp(cmd,"")) { /* only for get a new prompt */ |
---|
| 611 | strcpy(last_cmd,cmd); |
---|
| 612 | }; |
---|
| 613 | /* exec cmd section */ |
---|
| 614 | /* TODO: |
---|
| 615 | * To avoid user crash catch the signals. |
---|
| 616 | * Open a new stdio files with posibility of redirection * |
---|
| 617 | * Run in a new shell task background. (unix &) |
---|
| 618 | * Resuming. A little bash. |
---|
| 619 | */ |
---|
| 620 | if (shell_make_args(cmd,&argc,argv)) { |
---|
| 621 | if ((shell_cmd=shell_lookup_cmd(argv[0]))!=NULL) { |
---|
| 622 | shell_env->errorlevel=shell_cmd->command(argc,argv); |
---|
| 623 | } else { |
---|
| 624 | printf("shell:%s command not found\n",argv[0]); |
---|
| 625 | shell_env->errorlevel=-1; |
---|
| 626 | }; |
---|
[dd74e612] | 627 | }; |
---|
[b2712e3] | 628 | /* end exec cmd section */ |
---|
| 629 | if (shell_env->exit_shell) break; |
---|
[70d689a] | 630 | cmd[0]=0; |
---|
[dd74e612] | 631 | }; |
---|
[b2712e3] | 632 | printf("\nGoodbye from RTEMS SHELL :-(\n"); |
---|
[dd74e612] | 633 | }; |
---|
[b2712e3] | 634 | } while (shell_env->forever); |
---|
| 635 | fclose(stdin ); |
---|
| 636 | fclose(stdout); |
---|
| 637 | fclose(stderr); |
---|
[dd74e612] | 638 | rtems_task_delete(RTEMS_SELF); |
---|
| 639 | } |
---|
| 640 | /* ----------------------------------------------- */ |
---|
| 641 | rtems_status_code shell_init (char * task_name, |
---|
| 642 | rtems_unsigned32 task_stacksize, |
---|
| 643 | rtems_task_priority task_priority, |
---|
| 644 | char * devname, |
---|
[b2712e3] | 645 | tcflag_t tcflag, |
---|
| 646 | int forever) { |
---|
[dd74e612] | 647 | rtems_id task_id; |
---|
| 648 | rtems_status_code sc; |
---|
| 649 | shell_env_t * shell_env; |
---|
| 650 | sc=rtems_task_create(new_rtems_name(task_name), |
---|
| 651 | task_priority, |
---|
| 652 | task_stacksize?task_stacksize:RTEMS_MINIMUM_STACK_SIZE, |
---|
[b2712e3] | 653 | RTEMS_DEFAULT_MODES, |
---|
[b70779a] | 654 | RTEMS_LOCAL | RTEMS_FLOATING_POINT, |
---|
[dd74e612] | 655 | &task_id); |
---|
| 656 | if (sc!=RTEMS_SUCCESSFUL) { |
---|
| 657 | rtems_error(sc,"creating task %s in shell_init()",task_name); |
---|
| 658 | return sc; |
---|
| 659 | }; |
---|
| 660 | shell_env=malloc(sizeof(shell_env_t)); |
---|
| 661 | if (!shell_env) { |
---|
| 662 | rtems_task_delete(task_id); |
---|
| 663 | sc=RTEMS_NO_MEMORY; |
---|
| 664 | rtems_error(sc,"allocating shell_env %s in shell_init()",task_name); |
---|
| 665 | return sc; |
---|
| 666 | }; |
---|
| 667 | if (global_shell_env.magic!=new_rtems_name("SENV")) { |
---|
[b2712e3] | 668 | global_shell_env.magic =new_rtems_name("SENV"); |
---|
| 669 | global_shell_env.devname ="/dev/console"; |
---|
| 670 | global_shell_env.taskname ="GLOBAL"; |
---|
| 671 | global_shell_env.tcflag =0; |
---|
| 672 | global_shell_env.exit_shell=0; |
---|
| 673 | global_shell_env.forever =TRUE; |
---|
[dd74e612] | 674 | }; |
---|
[b2712e3] | 675 | shell_env->magic =global_shell_env.magic; |
---|
| 676 | shell_env->devname =devname; |
---|
| 677 | shell_env->taskname =task_name; |
---|
| 678 | shell_env->tcflag =tcflag; |
---|
| 679 | shell_env->exit_shell=FALSE; |
---|
| 680 | shell_env->forever =forever; |
---|
[dd74e612] | 681 | return rtems_task_start(task_id,shell_shell,(rtems_task_argument) shell_env); |
---|
| 682 | } |
---|