I hereby relicense all my work on Sortix under the ISC license as below. All Sortix contributions by other people are already under this license, are not substantial enough to be copyrightable, or have been removed. All imported code from other projects is compatible with this license. All GPL licensed code from other projects had previously been removed. Copyright 2011-2016 Jonas 'Sortie' Termansen and contributors. Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
317 lines
7.6 KiB
C
317 lines
7.6 KiB
C
/*
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* Copyright (c) 2012, 2015 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* mkdir.c
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* Create a directory.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <error.h>
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#include <inttypes.h>
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#include <stdbool.h>
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#include <stddef.h>
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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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static bool is_octal_string(const char* str)
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{
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if ( !str[0] )
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return false;
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for ( size_t i = 0; str[i]; i++ )
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if ( !('0' <= str[i] && str[i] <= '7') )
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return false;
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return true;
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}
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static mode_t execute_modespec(const char* str,
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mode_t mode,
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mode_t type,
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mode_t umask)
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{
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if ( is_octal_string(str) )
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{
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errno = 0;
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uintmax_t input = strtoumax((char*) str, NULL, 8);
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if ( errno == ERANGE )
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return (mode_t) -1;
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if ( input & ~((uintmax_t) 07777) )
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return (mode_t) -1;
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return (mode_t) input;
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}
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size_t index = 0;
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do
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{
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mode_t who_mask = 01000;
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while ( true )
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{
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if ( str[index] == 'u' && (index++, true) )
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who_mask |= 04700;
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else if ( str[index] == 'g' && (index++, true) )
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who_mask |= 02070;
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else if ( str[index] == 'o' && (index++, true) )
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who_mask |= 00007;
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else if ( str[index] == 'a' && (index++, true) )
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who_mask |= 06777;
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else
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break;
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}
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if ( !(who_mask & 0777) )
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who_mask |= 06777 & ~umask;
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do
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{
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char op;
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switch ( (op = str[index++]) )
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{
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case '+': break;
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case '-': break;
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case '=': break;
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default: return (mode_t) -1;
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};
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mode_t operand = 0;
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if ( str[index] == 'u' || str[index] == 'g' || str[index] == 'o' )
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{
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char permcopy = str[index++];
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switch ( permcopy )
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{
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case 'u': operand = mode >> 6 & 07; break;
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case 'g': operand = mode >> 3 & 07; break;
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case 'o': operand = mode >> 0 & 07; break;
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default: __builtin_unreachable();
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};
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operand = operand << 0 | operand << 3 | operand << 6;
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switch ( permcopy )
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{
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case 'u': if ( mode & 04000) operand |= 06000; break;
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case 'g': if ( mode & 02000) operand |= 06000; break;
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};
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who_mask &= ~((mode_t) 01000);
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}
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else
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{
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bool unknown = false;
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do
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{
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switch ( str[index] )
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{
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case 'r': operand |= 00444; break;
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case 'w': operand |= 00222; break;
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case 'x': operand |= 00111; break;
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case 'X':
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if ( S_ISDIR(type) || (mode & 0111) )
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operand |= 00111;
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break;
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case 's': operand |= 06000; break;
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case 't': operand |= 00000; break;
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default: unknown = true; break;
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}
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} while ( !unknown && (index++, true) );
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}
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switch ( op )
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{
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case '+': mode |= (operand & who_mask); break;
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case '-': mode &= ~(operand & who_mask); break;
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case '=': mode = (mode & ~who_mask) | (operand & who_mask); break;
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default: __builtin_unreachable();
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}
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} while ( str[index] == '+' ||
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str[index] == '-' ||
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str[index] == '=' );
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} while ( str[index] == ',' && (index++, true) );
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if ( str[index] )
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return (mode_t) -1;
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return mode;
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}
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static bool is_valid_modespec(const char* str)
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{
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return execute_modespec(str, 0, 0, 0) != (mode_t) -1;
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}
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static void make_directory(const char* path,
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bool parents,
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bool verbose,
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const char* modespec,
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bool is_parent)
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{
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mode_t my_umask = getumask();
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mode_t mode = 0777;
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if ( modespec )
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{
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mode = execute_modespec(modespec, 0777, S_IFDIR, my_umask);
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if ( is_parent )
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mode |= 0300;
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}
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while ( true )
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{
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if ( modespec )
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umask(0);
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else if ( is_parent && (my_umask & 0300) )
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umask(my_umask & ~0300);
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int ret = mkdir(path, mode);
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if ( modespec || (is_parent && (my_umask & 0300)) )
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umask(my_umask);
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if ( ret < 0 )
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{
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if ( parents )
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{
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if ( errno == EEXIST )
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return;
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if ( errno == ENOENT )
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{
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char* path_copy = strdup(path);
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if ( !path_copy )
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error(1, errno, "malloc");
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char* last_slash = strrchr(path_copy, '/');
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if ( last_slash )
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{
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*last_slash = 0;
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if ( *path_copy )
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{
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make_directory(path_copy, parents, verbose,
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modespec, true);
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free(path_copy);
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continue;
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}
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}
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free(path_copy);
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}
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}
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error(1, errno, "cannot create directory `%s'", path);
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}
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break;
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}
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if ( verbose )
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fprintf(stderr, "%s: created directory `%s'\n", program_invocation_name, path);
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}
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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 help(FILE* fp, const char* argv0)
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{
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fprintf(fp, "Usage: %s [OPTION]... DIRECTORY...\n", argv0);
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fprintf(fp, "Create directories if they don't already exist.\n");
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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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}
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int main(int argc, char* argv[])
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{
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const char* argv0 = argv[0];
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bool parents = false;
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bool verbose = false;
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const char* modespec = NULL;
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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] )
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continue;
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argv[i] = NULL;
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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) ) switch ( c )
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{
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case 'm':
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if ( !*(modespec = arg + 1) )
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{
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if ( i + 1 == argc )
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{
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error(0, 0, "option requires an argument -- 'm'");
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fprintf(stderr, "Try `%s --help' for more information.\n", argv[0]);
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exit(125);
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}
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modespec = argv[i+1];
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argv[++i] = NULL;
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}
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arg = "m";
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break;
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case 'p': parents = true; break;
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case 'v': verbose = 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(1);
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}
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}
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else if ( !strncmp(arg, "--modespec=", strlen("--modespec=")) )
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modespec = arg + strlen("--modespec=");
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else if ( !strcmp(arg, "--modespec") )
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{
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if ( i + 1 == argc )
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{
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error(0, 0, "option '--modespec' requires an argument");
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fprintf(stderr, "Try `%s --help' for more information.\n", argv[0]);
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exit(125);
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}
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modespec = argv[i+1];
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argv[++i] = NULL;
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}
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else if ( !strcmp(arg, "--parents") )
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parents = true;
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else if ( !strcmp(arg, "--verbose") )
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verbose = true;
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else if ( !strcmp(arg, "--help") )
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help(stdout, argv0), exit(0);
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else if ( !strcmp(arg, "--version") )
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version(stdout, argv0), exit(0);
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else
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{
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fprintf(stderr, "%s: unknown option: %s\n", argv0, arg);
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help(stderr, argv0);
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exit(1);
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}
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}
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compact_arguments(&argc, &argv);
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if ( argc < 2 )
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error(1, 0, "missing operand");
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if ( modespec && !is_valid_modespec(modespec) )
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error(1, 0, "invalid mode: `%s'", modespec);
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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 )
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continue;
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make_directory(arg, parents, verbose, modespec, false);
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}
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return 0;
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}
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