101 lines
2.3 KiB
C++
101 lines
2.3 KiB
C++
/*******************************************************************************
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COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011, 2012.
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This program is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the Free
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Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program. If not, see <http://www.gnu.org/licenses/>.
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ls.cpp
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Lists directory contents.
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*******************************************************************************/
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#include <stdio.h>
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#include <fcntl.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <error.h>
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#include <dirent.h>
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#include <sys/wait.h>
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#include <libmaxsi/platform.h>
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#include <libmaxsi/process.h>
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int ls(const char* path)
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{
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DIR* dir = opendir(path);
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if ( !dir ) { error(2, errno, "%s", path); return 2; }
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// TODO: Hack until mountpoints work correctly.
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if ( strcmp(path, "/") == 0 ) { printf("bin\ndev\n"); }
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struct dirent* entry;
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while ( (entry = readdir(dir)) )
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{
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printf("%s\n", entry->d_name);
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}
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if ( derror(dir) )
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{
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error(2, errno, "readdir: %s", path);
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}
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closedir(dir);
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return 0;
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}
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int main(int argc, char* argv[])
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{
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pid_t childpid = 0;
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if ( isatty(1) )
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{
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int pipes[2];
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if ( pipe(pipes) ) { perror("pipe"); return 1; }
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childpid = fork();
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if ( childpid < 0 ) { perror("fork"); return 1; }
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if ( childpid )
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{
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close(1);
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dup(pipes[1]);
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close(pipes[0]);
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close(pipes[1]);
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}
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else
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{
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close(0);
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dup(pipes[0]);
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close(pipes[0]);
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close(pipes[1]);
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const char* columner = "column";
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const char* argv[] = { columner, NULL };
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execv(columner, (char* const*) argv);
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error(127, errno, "%s", columner);
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}
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}
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const size_t CWD_SIZE = 512;
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char cwd[CWD_SIZE];
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const char* path = getcwd(cwd, CWD_SIZE);
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if ( !path ) { path = "."; }
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if ( 1 < argc ) { path = argv[1]; }
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int result = ls(path);
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int status;
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if ( childpid ) { close(1); wait(&status); }
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return result;
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}
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