diff --git a/doc/user-guide b/doc/user-guide index cb3eb11c..f7b29a2b 100644 --- a/doc/user-guide +++ b/doc/user-guide @@ -212,6 +212,7 @@ Sortix comes with a number of home-made programs. Here is an overview: * `sh` - command shell * `sleep` - delay for a specified amount of time * `sort` - sort lines of text files +* `stat` - display file status * `tail` - display end of file * `time` - measure program running time * `trianglix` - triangle system diff --git a/utils/.gitignore b/utils/.gitignore index 90306a79..b195b601 100644 --- a/utils/.gitignore +++ b/utils/.gitignore @@ -37,6 +37,7 @@ rm rmdir sleep sort +stat tail time tr diff --git a/utils/Makefile b/utils/Makefile index f9007d81..92c44855 100644 --- a/utils/Makefile +++ b/utils/Makefile @@ -49,6 +49,7 @@ rm \ rmdir \ sleep \ sort \ +stat \ tail \ time \ tr \ diff --git a/utils/stat.cpp b/utils/stat.cpp new file mode 100644 index 00000000..e78f27ea --- /dev/null +++ b/utils/stat.cpp @@ -0,0 +1,215 @@ +/******************************************************************************* + + Copyright(C) Jonas 'Sortie' Termansen 2015. + + This program is free software: you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by the Free + Software Foundation, either version 3 of the License, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + more details. + + You should have received a copy of the GNU General Public License along with + this program. If not, see . + + stat.cpp + Display file status. + +*******************************************************************************/ + +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +char file_type_character(mode_t mode) +{ + if ( S_ISBLK(mode) ) + return 'b'; + if ( S_ISCHR(mode) ) + return 'c'; + if ( S_ISDIR(mode) ) + return 'd'; + if ( S_ISFIFO(mode) ) + return 'p'; + if ( S_ISLNK(mode) ) + return 'l'; + if ( S_ISREG(mode) ) + return '-'; + if ( S_ISSOCK(mode) ) + return 's'; + return '?'; +} + +static void render_perms(char perms[11], mode_t mode) +{ + perms[0] = file_type_character(mode); + const char flagnames[] = { 'x', 'w', 'r' }; + for ( size_t i = 0; i < 9; i++ ) + { + perms[9-i] = mode & 1 << i ? flagnames[i % 3] : '-'; + } + if ( mode & S_ISUID ) + perms[3] = mode & 0100 ? 's' : 'S'; + if ( mode & S_ISGID ) + perms[6] = mode & 0010 ? 's' : 'S'; + if ( mode & S_ISVTX ) + perms[9] = mode & 0001 ? 't' : 'T'; + perms[10] = 0; +} + +static void display_status(struct stat* st, const char* path) +{ + printf("File: `%s'", path); + if ( S_ISLNK(st->st_mode) && (uintmax_t) st->st_size < (uintmax_t) SIZE_MAX ) + { + size_t target_size = (size_t) st->st_size; + char* target = (char*) malloc(target_size + 1); + ssize_t target_read; + if ( target && 0 <= (target_read = readlink(path, target, target_size)) ) + { + target[target_read] = '\0'; + printf(" -> `%s'", target); + } + free(target); + } + printf("\n"); + printf("Size: %" PRIiOFF "\n", st->st_size); + char perms[11]; + render_perms(perms, st->st_mode); + printf("Mode: %" PRIoMODE "/%s", st->st_mode, perms); + printf("\n"); + printf("Device: 0x%" PRIXDEV "\n", st->st_dev); + printf("Inode: %" PRIuINO "\n", st->st_ino); + printf("Links: %" PRIuNLINK "\n", st->st_nlink); + printf("UID: %" PRIuUID "", st->st_uid); + struct passwd* pwd = getpwuid(st->st_uid); + if ( pwd ) + printf("/%s", pwd->pw_name); + printf("\n"); + printf("GID: %" PRIuGID "", st->st_gid); + struct group* grp = getgrgid(st->st_gid); + if ( grp ) + printf("/%s", grp->gr_name); + printf("\n"); + struct tm tm; + localtime_r(&st->st_atim.tv_sec, &tm); + printf("Access: %i-%02i-%02i %02i:%02i:%02i.%09li\n", + tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, + tm.tm_hour, tm.tm_min, tm.tm_sec, st->st_atim.tv_nsec); + localtime_r(&st->st_mtim.tv_sec, &tm); + printf("Modify: %i-%02i-%02i %02i:%02i:%02i.%09li\n", + tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, + tm.tm_hour, tm.tm_min, tm.tm_sec, st->st_mtim.tv_nsec); + localtime_r(&st->st_ctim.tv_sec, &tm); + printf("Change: %i-%02i-%02i %02i:%02i:%02i.%09li\n", + tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, + tm.tm_hour, tm.tm_min, tm.tm_sec, st->st_ctim.tv_nsec); + printf("Blocksize: %" PRIiBLKSIZE "\n", st->st_blksize); + printf("Blocks: %" PRIiBLKCNT "\n", st->st_blocks); +} + +static void compact_arguments(int* argc, char*** argv) +{ + for ( int i = 0; i < *argc; i++ ) + { + while ( i < *argc && !(*argv)[i] ) + { + for ( int n = i; n < *argc; n++ ) + (*argv)[n] = (*argv)[n+1]; + (*argc)--; + } + } +} + +static void help(FILE* fp, const char* argv0) +{ + fprintf(fp, "Usage: %s [OPTION]...\n", argv0); + fprintf(fp, "List processes.\n"); +} + +static void version(FILE* fp, const char* argv0) +{ + fprintf(fp, "%s (Sortix) %s\n", argv0, VERSIONSTR); + fprintf(fp, "License GPLv3+: GNU GPL version 3 or later .\n"); + fprintf(fp, "This is free software: you are free to change and redistribute it.\n"); + fprintf(fp, "There is NO WARRANTY, to the extent permitted by law.\n"); +} + +int main(int argc, char* argv[]) +{ + setlocale(LC_ALL, ""); + + bool dereference = false; + + const char* argv0 = argv[0]; + for ( int i = 1; i < argc; i++ ) + { + const char* arg = argv[i]; + if ( arg[0] != '-' || !arg[1] ) + continue; + argv[i] = NULL; + if ( !strcmp(arg, "--") ) + break; + if ( arg[1] != '-' ) + { + while ( char c = *++arg ) switch ( c ) + { + case 'L': dereference = true; break; + default: + fprintf(stderr, "%s: unknown option -- '%c'\n", argv0, c); + help(stderr, argv0); + exit(1); + } + } + else if ( !strcmp(arg, "--help") ) + help(stdout, argv0), exit(0); + else if ( !strcmp(arg, "--version") ) + version(stdout, argv0), exit(0); + else if ( !strcmp(arg, "--dereference") ) + dereference = true; + else + { + fprintf(stderr, "%s: unknown option: %s\n", argv0, arg); + help(stderr, argv0); + exit(1); + } + } + + compact_arguments(&argc, &argv); + + int result = 0; + + if ( argc <= 1 ) + { + struct stat st; + if ( fstat(0, &st) < 0 ) + err(1, "fstat: %s", ""); + display_status(&st, ""); + } + else for ( int i = 1; i < argc; i++ ) + { + struct stat st; + if ( (dereference ? stat : lstat)(argv[i], &st) < 0 ) + { + warn("fstat: %s", argv[i]); + result = 1; + continue; + } + display_status(&st, argv[i]); + } + + return ferror(stdout) || fflush(stdout) == EOF ? 1 : result; +}