Finish!
This commit is contained in:
parent
0fbb6dd5fb
commit
ac6e1d2c3d
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@ -5,6 +5,6 @@
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"tasks": [{
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"label": "Build",
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"type": "shell",
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"command": "cmake . && make"
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"command": "clear && cmake . && make"
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}]
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}
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@ -9,67 +9,16 @@ set(CMAKE_MAKEFILE_DEPENDS
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"CMakeCache.txt"
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"CMakeFiles/3.10.2/CMakeCCompiler.cmake"
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"CMakeFiles/3.10.2/CMakeSystem.cmake"
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"CMakeFiles/feature_tests.c"
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"CMakeLists.txt"
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"/usr/share/cmake-3.10/Modules/CMakeCCompiler.cmake.in"
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"/usr/share/cmake-3.10/Modules/CMakeCCompilerABI.c"
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"/usr/share/cmake-3.10/Modules/CMakeCInformation.cmake"
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"/usr/share/cmake-3.10/Modules/CMakeCommonLanguageInclude.cmake"
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"/usr/share/cmake-3.10/Modules/CMakeCompilerIdDetection.cmake"
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"/usr/share/cmake-3.10/Modules/CMakeDetermineCCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/CMakeDetermineCompileFeatures.cmake"
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"/usr/share/cmake-3.10/Modules/CMakeDetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/CMakeDetermineCompilerABI.cmake"
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"/usr/share/cmake-3.10/Modules/CMakeDetermineCompilerId.cmake"
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"/usr/share/cmake-3.10/Modules/CMakeDetermineSystem.cmake"
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"/usr/share/cmake-3.10/Modules/CMakeFindBinUtils.cmake"
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"/usr/share/cmake-3.10/Modules/CMakeGenericSystem.cmake"
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"/usr/share/cmake-3.10/Modules/CMakeLanguageInformation.cmake"
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"/usr/share/cmake-3.10/Modules/CMakeParseImplicitLinkInfo.cmake"
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"/usr/share/cmake-3.10/Modules/CMakeSystem.cmake.in"
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"/usr/share/cmake-3.10/Modules/CMakeSystemSpecificInformation.cmake"
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"/usr/share/cmake-3.10/Modules/CMakeSystemSpecificInitialize.cmake"
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"/usr/share/cmake-3.10/Modules/CMakeTestCCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/CMakeTestCompilerCommon.cmake"
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"/usr/share/cmake-3.10/Modules/CMakeUnixFindMake.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/ADSP-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/ARMCC-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/AppleClang-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/Borland-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/Bruce-C-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/CMakeCommonCompilerMacros.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/Clang-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/Clang-DetermineCompilerInternal.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/Compaq-C-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/Cray-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/Embarcadero-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/Fujitsu-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/GHS-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/GNU-C-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/GNU-C-FeatureTests.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/GNU-C.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/GNU-FindBinUtils.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/GNU.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/HP-C-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/IAR-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/IBMCPP-C-DetermineVersionInternal.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/Intel-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/MIPSpro-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/MSVC-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/NVIDIA-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/OpenWatcom-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/PGI-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/PathScale-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/SCO-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/SDCC-C-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/SunPro-C-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/TI-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/TinyCC-C-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/VisualAge-C-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/Watcom-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/XL-C-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Compiler/zOS-C-DetermineCompiler.cmake"
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"/usr/share/cmake-3.10/Modules/Internal/FeatureTesting.cmake"
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"/usr/share/cmake-3.10/Modules/Platform/Linux-GNU-C.cmake"
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"/usr/share/cmake-3.10/Modules/Platform/Linux-GNU.cmake"
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"/usr/share/cmake-3.10/Modules/Platform/Linux.cmake"
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@ -84,9 +33,6 @@ set(CMAKE_MAKEFILE_OUTPUTS
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# Byproducts of CMake generate step:
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set(CMAKE_MAKEFILE_PRODUCTS
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"CMakeFiles/3.10.2/CMakeSystem.cmake"
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"CMakeFiles/3.10.2/CMakeCCompiler.cmake"
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"CMakeFiles/3.10.2/CMakeCCompiler.cmake"
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"CMakeFiles/CMakeDirectoryInformation.cmake"
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)
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@ -1 +0,0 @@
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empty
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@ -1 +0,0 @@
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empty
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@ -1 +0,0 @@
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2
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@ -7,4 +7,14 @@
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#IncludeRegexTransform:
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/home/ayham-mamoun/Desktop/git/lsh/src/main.c
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stdio.h
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-
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stdlib.h
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-
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string.h
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-
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sys/unistd.h
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-
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sys/wait.h
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-
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Binary file not shown.
180
src/main.c
180
src/main.c
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@ -0,0 +1,180 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/unistd.h>
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#include <sys/wait.h>
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#define LSH_RL_BUFSIZE 1024
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char* lsh_read_line(void) {
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int bufsize = LSH_RL_BUFSIZE;
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int position = 0;
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char* buffer = malloc(sizeof(char) * bufsize);
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int c;
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if (!buffer) {
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fprintf(stderr, "lsh: allocation error\n");
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exit(EXIT_FAILURE);
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}
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while (1) {
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// Read a character
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c = getchar();
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// If we hit EOF, replace if with a null characeter and return.
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if (c == EOF || c == '\n') {
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buffer[position] = '\0';
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return buffer;
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} else
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buffer[position] = c;
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position++;
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// If we have exceeded the buffer, reallocate.
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if (position >= bufsize) {
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bufsize += LSH_RL_BUFSIZE;
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buffer = realloc(buffer, bufsize);
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if (!buffer) {
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fprintf(stderr, "lsh: allocation error\n");
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exit(EXIT_FAILURE);
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}
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}
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}
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}
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#define LSH_TOK_BUFSIZE 64
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#define LSH_TOK_DELIM " \t\r\n\a"
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char** lsh_split_line(char* line) {
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int bufsize = LSH_TOK_BUFSIZE, position = 0;
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char** tokens = malloc(bufsize * sizeof(char*));
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char* token;
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if (!tokens) {
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fprintf(stderr, "lsh: allocation error\n");
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exit(EXIT_FAILURE);
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}
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token = strtok(line, LSH_TOK_DELIM);
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while (token != NULL) {
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tokens[position] = token;
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position++;
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if (position >= bufsize) {
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bufsize += LSH_TOK_BUFSIZE;
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tokens = realloc(tokens, bufsize * sizeof(char*));
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if (!tokens) {
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fprintf(stderr, "lsh: allocation error\n");
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exit(EXIT_FAILURE);
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}
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}
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token = strtok(NULL, LSH_TOK_DELIM);
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}
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tokens[position] = NULL;
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return tokens;
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}
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int lsh_launch(char** args) {
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pid_t pid, wpid;
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int status;
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pid = fork();
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if (pid == 0) {
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// Child process
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if (execvp(args[0], args) == -1) {
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perror("lsh");
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}
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exit(EXIT_FAILURE);
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} else if (pid < 0) {
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// Error forking
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perror("lsh");
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} else {
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// Parent process
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do {
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wpid = waitpid(pid, &status, WUNTRACED);
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} while (!WIFEXITED(status) && !WIFSIGNALED(status));
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}
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return 1;
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}
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/*
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Function Declarations for builtin shell commands:
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*/
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int lsh_cd(char** args);
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int lsh_help(char** args);
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int lsh_exit(char** args);
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/*
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List of builtin commands, followed by their corresponding functions
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*/
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char* builtin_str[] = {"cd", "help", "exit"};
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int (*builtin_func[])(char**) = {
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&lsh_cd,
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&lsh_help,
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&lsh_exit,
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};
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int lsh_num_builtins() { return sizeof(builtin_str) / sizeof(char*); }
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int lsh_cd(char** args) {
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if (args[1] == NULL) {
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fprintf(stderr, "lsh: expected argument to \"cd\"\n");
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} else {
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if (chdir(args[1]) != 0) {
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perror("lsh");
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}
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}
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return 1;
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}
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int lsh_help(char** args) {
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int i;
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for (i = 0; i < lsh_num_builtins(); i++) {
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printf(" %s\n", builtin_str[i]);
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}
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printf("Use the man command for information on other programs. \n");
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return 1;
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}
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int lsh_exit(char** args) { return 0; }
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int lsh_execute(char** args) {
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int i;
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if (args[0] == NULL)
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// An empty command was entered.
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return 1;
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for (i = 0; i < lsh_num_builtins(); i++) {
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if (strcmp(args[0], builtin_str[i]) == 0)
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return (*builtin_func[i])(args);
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}
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return lsh_launch(args);
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}
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void lsh_loop(void) {
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char* line;
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char** args;
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int status;
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do {
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printf("> ");
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line = lsh_read_line();
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args = lsh_split_line(line);
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status = lsh_execute(args);
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free(line);
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free(args);
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} while (status);
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}
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int main(int argc, char** argv) {
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// Load config files, if amy.
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// Run command loop.
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lsh_loop();
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// Perform any shutdown/cleanup.
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return EXIT_SUCCESS;
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}
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Loading…
Reference in New Issue