mirror of
https://gitlab.com/sortix/sortix.git
synced 2023-02-13 20:55:38 -05:00
Rewrite ls(1).
This commit is contained in:
Jonas 'Sortie' Termansen
parent
01402052f6
commit
a334ede4c4
1 changed files with 201 additions and 137 deletions
338
utils/ls.cpp
338
utils/ls.cpp
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@ -28,6 +28,7 @@
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#include <errno.h>
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#include <error.h>
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#include <fcntl.h>
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#include <locale.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdint.h>
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@ -37,37 +38,21 @@
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#include <time.h>
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#include <unistd.h>
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int current_year;
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#if !defined(VERSIONSTR)
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#define VERSIONSTR "unknown version"
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#endif
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bool directory = false;
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bool inode = false;
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bool longformat = false;
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bool showdotdot = false;
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bool showdotfiles = false;
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bool time_modified = false;
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bool colors = false;
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int current_year;
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pid_t childpid;
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bool option_colors = false;
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bool option_directory = false;
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bool option_inode = false;
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bool option_long_format = false;
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bool option_show_dotdot = false;
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bool option_show_dotfiles = false;
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bool option_time_modified = false;
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void finishoutput()
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{
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int errnum = errno;
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int status;
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fflush(stdout);
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if ( childpid ) { close(1); wait(&status); }
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childpid = 0;
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errno = errnum;
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}
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void ls_perror(const char* s)
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{
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finishoutput();
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perror(s);
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}
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pid_t child_pid;
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static struct dirent* dirent_dup(struct dirent* entry)
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{
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@ -78,9 +63,23 @@ static struct dirent* dirent_dup(struct dirent* entry)
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return copy;
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}
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void finish_output()
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{
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int errnum = errno;
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fflush(stdout);
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if ( child_pid )
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{
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int status;
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close(1);
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wait(&status);
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child_pid = 0;
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}
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errno = errnum;
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}
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void ls_error(int status, int errnum, const char* format, ...)
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{
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finishoutput();
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finish_output();
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// TODO: The rest is just plain generic gnu_error(3), how about a function
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// called gnu_verror(3) that accepts a va_list.
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@ -135,7 +134,7 @@ int sort_dirents(const void* a_void, const void* b_void)
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struct dirent* b = *(struct dirent**) b_void;
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struct stat a_st;
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struct stat b_st;
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if ( time_modified &&
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if ( option_time_modified &&
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fstatat(sort_dirents_dirfd, a->d_name, &a_st, 0) == 0 &&
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fstatat(sort_dirents_dirfd, b->d_name, &b_st, 0) == 0 )
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{
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@ -152,49 +151,88 @@ int sort_dirents(const void* a_void, const void* b_void)
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return strcmp(a->d_name, b->d_name);
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}
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void getentrycolor(const char** pre, const char** post, mode_t mode)
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{
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*pre = "";
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*post = "";
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if ( !colors )
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return;
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if ( S_ISDIR(mode) )
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*pre = "\e[36m",
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*post = "\e[37m";
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else if ( mode & 0111 )
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*pre = "\e[32m",
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*post = "\e[37m";
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}
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int handleentry_internal(const char* fullpath, const char* name)
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int handle_entry_internal(const char* fullpath, const char* name, unsigned char type)
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{
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// TODO: Use openat and fstat.
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struct stat st;
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if ( stat(fullpath, &st) )
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bool stat_error = false;
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if ( (option_long_format || type == DT_UNKNOWN || type == DT_REG) )
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{
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finishoutput();
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error(0, errno, "stat: %s", fullpath);
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return 2;
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if ( stat(fullpath, &st) == 0 )
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{
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if ( S_ISBLK(st.st_mode) )
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type = DT_BLK;
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if ( S_ISCHR(st.st_mode) )
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type = DT_CHR;
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if ( S_ISDIR(st.st_mode) )
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type = DT_DIR;
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if ( S_ISFIFO(st.st_mode) )
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type = DT_FIFO;
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if ( S_ISLNK(st.st_mode) )
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type = DT_LNK;
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if ( S_ISREG(st.st_mode) )
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type = DT_REG;
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if ( S_ISSOCK(st.st_mode) )
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type = DT_SOCK;
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}
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else
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{
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memset(&st, 0, sizeof(st));
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stat_error = true;
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}
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}
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const char* colorpre;
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const char* colorpost;
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getentrycolor(&colorpre, &colorpost, st.st_mode);
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if ( inode )
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printf("%ju ", (uintmax_t) st.st_ino);
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if ( !longformat )
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const char* color_pre = "";
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const char* color_post = "";
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if ( option_colors )
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{
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printf("%s%s%s\n", colorpre, name, colorpost);
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color_post = "\e[m";
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switch ( type )
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{
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case DT_UNKNOWN: color_pre = "\e[91m"; break;
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case DT_BLK: color_pre = "\e[93m"; break;
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case DT_CHR: color_pre = "\e[93m"; break;
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case DT_DIR: color_pre = "\e[36m"; break;
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case DT_FIFO: color_pre = "\e[33m"; break;
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case DT_LNK: color_pre = "\e[96m"; break;
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case DT_SOCK: color_pre = "\e[35m"; break;
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case DT_REG:
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if ( type == DT_REG && !stat_error && (st.st_mode & 0111) )
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color_pre = "\e[32m";
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else
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color_post = "";
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break;
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default:
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color_post = "";
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}
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}
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if ( option_inode )
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printf("%ju ", (uintmax_t) st.st_ino);
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if ( !option_long_format )
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{
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printf("%s%s%s\n", color_pre, name, color_post);
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return 0;
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}
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char perms[11];
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perms[0] = '?';
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if ( S_ISREG(st.st_mode) ) { perms[0] = '-'; }
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if ( S_ISDIR(st.st_mode) ) { perms[0] = 'd'; }
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switch ( type )
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{
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case DT_UNKNOWN: perms[0] = '?'; break;
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case DT_BLK: perms[0] = 'b'; break;
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case DT_CHR: perms[0] = 'c'; break;
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case DT_DIR: perms[0] = 'd'; break;
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case DT_FIFO: perms[0] = 'p'; break;
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case DT_LNK: perms[0] = 'l'; break;
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case DT_REG: perms[0] = '-'; break;
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case DT_SOCK: perms[0] = 's'; break;
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default: perms[0] = '?'; break;
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}
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const char flagnames[] = { 'x', 'w', 'r' };
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for ( size_t i = 0; i < 9; i++ )
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{
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bool set = st.st_mode & (1UL<<i);
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perms[9-i] = set ? flagnames[i % 3] : '-';
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perms[9-i] = stat_error ? '?' : set ? flagnames[i % 3] : '-';
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}
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const char* sizeunit = "B";
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off_t size = st.st_size;
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@ -216,35 +254,31 @@ int handleentry_internal(const char* fullpath, const char* name)
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(uintmax_t) st.st_nlink,
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(uintmax_t) size, sizeunit,
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time_str,
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colorpre, name, colorpost);
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color_pre, name, color_post);
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return 0;
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}
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int handleentry(const char* path, const char* name)
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int handle_entry(const char* path, const char* name, unsigned char type)
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{
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bool isdotdot = strcmp(name, ".") == 0 || strcmp(name, "..") == 0;
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bool isdotfile = !isdotdot && name[0] == '.';
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if ( isdotdot && !showdotdot && !directory ) { return 0; }
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if ( isdotfile && !showdotfiles && !directory ) { return 0; }
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if ( isdotdot && !option_show_dotdot && !option_directory )
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return 0;
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if ( isdotfile && !option_show_dotfiles && !option_directory )
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return 0;
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char* fullpath = new char[strlen(path) + 1 + strlen(name) + 1];
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strcpy(fullpath, path);
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strcat(fullpath, "/");
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strcat(fullpath, name);
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int result = handleentry_internal(fullpath, name);
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int result = handle_entry_internal(fullpath, name, type);
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delete[] fullpath;
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return result;
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}
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int ls(const char* path)
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{
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time_t current_time;
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struct tm current_year_tm;
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time(¤t_time);
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localtime_r(¤t_time, ¤t_year_tm);
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current_year = current_year_tm.tm_year;
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if ( directory )
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return handleentry_internal(path, path);
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if ( option_directory )
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return handle_entry_internal(path, path, DT_UNKNOWN);
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int ret = 1;
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DIR* dir;
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@ -253,20 +287,23 @@ int ls(const char* path)
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size_t entriesused = 0;
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size_t entriessize = sizeof(struct dirent*) * entrieslen;
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struct dirent** entries = (struct dirent**) malloc(entriessize);
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if ( !entries ) { ls_perror("malloc"); goto cleanup_done; }
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if ( !entries )
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{
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ls_error(0, errno, "malloc");
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goto cleanup_done;
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}
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dir = opendir(path);
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if ( !dir )
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{
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if ( errno == ENOTDIR )
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return handleentry_internal(path, path);
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return handle_entry_internal(path, path, DT_UNKNOWN);
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perror(path);
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ret = 2;
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goto cleanup_entries;
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}
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struct dirent* entry;
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while ( (entry = readdir(dir)) )
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while ( struct dirent* entry = readdir(dir) )
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{
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if ( entriesused == entrieslen )
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{
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@ -274,18 +311,30 @@ int ls(const char* path)
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struct dirent** newentries;
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size_t newentriessize = sizeof(struct dirent*) * newentrieslen;
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newentries = (struct dirent**) realloc(entries, newentriessize);
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if ( !newentries ) { ls_perror("realloc"); goto cleanup_dir; }
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if ( !newentries )
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{
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ls_error(0, errno, "realloc");
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goto cleanup_dir;
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}
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entries = newentries;
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entrieslen = newentrieslen;
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entriessize = newentriessize;
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}
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struct dirent* copy = dirent_dup(entry);
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if ( !copy ) { ls_perror("malloc"); goto cleanup_dir; }
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if ( !copy )
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{
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ls_error(0, errno, "malloc");
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goto cleanup_dir;
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}
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entries[entriesused++] = copy;
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}
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#if defined(sortix)
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if ( derror(dir) ) { perror(path); goto cleanup_dir; }
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if ( derror(dir) )
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{
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ls_error(0, errno, path);
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goto cleanup_dir;
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}
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#endif
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sort_dirents_dirfd = dirfd(dir);
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@ -293,7 +342,7 @@ int ls(const char* path)
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for ( size_t i = 0; i < entriesused; i++ )
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{
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if ( handleentry(path, entries[i]->d_name) != 0 )
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if ( handle_entry(path, entries[i]->d_name, entries[i]->d_type) != 0 )
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goto cleanup_dir;
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}
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@ -309,7 +358,20 @@ cleanup_done:
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return ret;
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}
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void version(FILE* fp, const char* argv0)
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static void compact_arguments(int* argc, char*** argv)
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{
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for ( int i = 0; i < *argc; i++ )
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{
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while ( i < *argc && !(*argv)[i] )
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{
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for ( int n = i; n < *argc; n++ )
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(*argv)[n] = (*argv)[n+1];
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(*argc)--;
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}
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}
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}
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static void version(FILE* fp, const char* argv0)
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{
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fprintf(fp, "%s (Sortix) %s\n", argv0, VERSIONSTR);
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fprintf(fp, "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.\n");
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@ -317,62 +379,52 @@ void version(FILE* fp, const char* argv0)
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fprintf(fp, "There is NO WARRANTY, to the extent permitted by law.\n");
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}
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void help(FILE* fp, const char* argv0)
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static void help(FILE* fp, const char* argv0)
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{
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fprintf(fp, "usage: %s [-l] [-a | -A] [<DIR> ...]\n", argv0);
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fprintf(fp, "Usage: %s [OPTION]... [FILE]...\n", argv0);
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}
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int main(int argc, char** argv)
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{
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setlocale(LC_ALL, "");
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const char* argv0 = argv[0];
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for ( int i = 1; i < argc; i++ )
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{
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const char* arg = argv[i];
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if ( arg[0] != '-' || !arg[1] ) { continue; }
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if ( arg[0] != '-' || !arg[1] )
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continue;
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argv[i] = NULL;
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if ( !strcmp(arg, "--") ) { break; }
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if ( !strcmp(arg, "--") )
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break;
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if ( arg[1] != '-' )
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{
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char c;
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while ( (c = *++arg) )
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while ( char c = *++arg ) switch ( c )
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{
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switch ( c )
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{
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case 'd':
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directory = true;
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break;
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case 'i':
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inode = true;
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break;
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case 'l':
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longformat = true;
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break;
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case 't':
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time_modified = true;
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break;
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case 'a':
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showdotdot = true;
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showdotfiles = true;
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break;
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case 'A':
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showdotdot = false;
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showdotfiles = true;
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break;
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default:
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fprintf(stderr, "%s: unknown option -- '%c'\n", argv0, c);
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help(stderr, argv0);
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exit(2);
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}
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case 'a': option_show_dotdot = true, option_show_dotfiles = true; break;
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case 'A': option_show_dotdot = false, option_show_dotfiles = true; break;
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case 'd': option_directory = true; break;
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case 'i': option_inode = true; break;
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case 'l': option_long_format = true; break;
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case 't': option_time_modified = true; break;
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default:
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fprintf(stderr, "%s: unknown option -- '%c'\n", argv0, c);
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help(stderr, argv0);
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exit(2);
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}
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}
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else if ( !strcmp(arg, "--version") )
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{
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version(stdout, argv0); exit(0);
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}
|
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version(stdout, argv0), exit(0);
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else if ( !strcmp(arg, "--help") )
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{
|
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help(stdout, argv0); exit(0);
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}
|
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help(stdout, argv0), exit(0);
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else if ( !strcmp(arg, "--all") )
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option_show_dotdot = false, option_show_dotfiles = true;
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else if ( !strcmp(arg, "--almost-all") )
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option_show_dotdot = false, option_show_dotfiles = true;
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else if ( !strcmp(arg, "--directory") )
|
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option_directory = true;
|
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else if ( !strcmp(arg, "--inode") )
|
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option_inode = true;
|
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else
|
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{
|
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fprintf(stderr, "%s: unrecognized option: %s\n", argv0, arg);
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|
|
@ -381,18 +433,28 @@ int main(int argc, char** argv)
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}
|
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}
|
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|
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if ( isatty(1) )
|
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colors = true;
|
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compact_arguments(&argc, &argv);
|
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|
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childpid = 0;
|
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bool columnable = !longformat;
|
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time_t current_time;
|
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struct tm current_year_tm;
|
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time(¤t_time);
|
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localtime_r(¤t_time, ¤t_year_tm);
|
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current_year = current_year_tm.tm_year;
|
||||
|
||||
if ( isatty(1) )
|
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option_colors = true;
|
||||
|
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child_pid = 0;
|
||||
bool columnable = !option_long_format;
|
||||
if ( columnable && isatty(1) )
|
||||
{
|
||||
int pipes[2];
|
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if ( pipe(pipes) ) { perror("pipe"); return 1; }
|
||||
childpid = fork();
|
||||
if ( childpid < 0 ) { perror("fork"); return 1; }
|
||||
if ( childpid )
|
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if ( pipe(pipes) )
|
||||
error(1, errno, "pipe");
|
||||
child_pid = fork();
|
||||
if ( child_pid < 0 )
|
||||
error(1, errno, "fork");
|
||||
if ( child_pid )
|
||||
{
|
||||
close(1);
|
||||
dup(pipes[1]);
|
||||
|
|
@ -412,22 +474,24 @@ int main(int argc, char** argv)
|
|||
}
|
||||
}
|
||||
|
||||
// TODO: This isn't the strictly correct semantics:
|
||||
if ( time_modified )
|
||||
qsort(argv + 1, argc - 1, sizeof(char*), argv_mtim_compare);
|
||||
|
||||
int result = 0;
|
||||
bool anyargs = false;
|
||||
for ( int i = 1; i < argc; i++ )
|
||||
|
||||
if ( 2 <= argc )
|
||||
{
|
||||
if ( !argv[i] ) { continue; }
|
||||
anyargs = true;
|
||||
if ( (result = ls(argv[i])) ) { break; }
|
||||
// TODO: This isn't the strictly correct semantics:
|
||||
if ( option_time_modified )
|
||||
qsort(argv + 1, argc - 1, sizeof(char*), argv_mtim_compare);
|
||||
|
||||
for ( int i = 1; i < argc; i++ )
|
||||
if ( (result = ls(argv[i])) != 0 )
|
||||
break;
|
||||
}
|
||||
else
|
||||
{
|
||||
result = ls(".");
|
||||
}
|
||||
|
||||
if ( !anyargs ) { result = ls("."); }
|
||||
|
||||
finishoutput();
|
||||
finish_output();
|
||||
|
||||
return result;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue