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.
242 lines
6.2 KiB
C
242 lines
6.2 KiB
C
/*
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* Copyright (c) 2013 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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* tix-execpatch.c
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* Patches the executable bits of files in the current source directory.
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*/
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <assert.h>
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#include <ctype.h>
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#include <dirent.h>
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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 <libgen.h>
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#include <signal.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "util.h"
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int fgetc_or_die(FILE* input, const char* input_path, size_t* line,
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size_t* column)
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{
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int result = fgetc(input);
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if ( result == '\n' )
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(*line)++, *column = 0;
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else
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(*column)++;
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if ( result == EOF && ferror(input) )
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error(1, errno, "read: `%s'", input_path);
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return result;
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}
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int fgetc_or_die_eof(FILE* input, const char* input_path, size_t* line,
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size_t* column)
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{
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int result = fgetc_or_die(input, input_path, line, column);
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if ( result == EOF )
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error(1, errno, "%s:%zu:%zu: unexpected end of file",
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input_path, *line, *column);
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return result;
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}
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bool check_eof(FILE* input, const char* input_path)
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{
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size_t line = 0;
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size_t column = 0;
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int c = fgetc_or_die(input, input_path, &line, &column);
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if ( c != EOF )
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{
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ungetc(c, input);
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return false;
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}
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return true;
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}
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void parse_fixed(const char* text, FILE* input, const char* input_path,
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size_t* line, size_t* column)
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{
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for ( size_t i = 0; text[i]; i++ )
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{
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int ic = fgetc_or_die(input, input_path, line, column);
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if ( ic == EOF )
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error(1, errno, "%s:%zu:%zu: unexpected end of file, expected `%s'",
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input_path, *line, *column, text + i);
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if ( ic != (unsigned char) text[i] )
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error(1, errno, "%s:%zu:%zu: parse error, expected `%s'", input_path,
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*line, *column, text + i);
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}
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}
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bool execpatch(FILE* input, const char* input_path, bool check)
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{
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char* buffer = NULL;
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size_t buffer_used = 0;
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size_t buffer_length = 0;
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bool result = true;
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size_t line = 1;
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while ( !check_eof(input, input_path) )
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{
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buffer_used = 0;
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size_t column = 0;
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parse_fixed("chmod ", input, input_path, &line, &column);
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bool plus;
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switch ( fgetc_or_die(input, input_path, &line, &column) )
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{
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case '-': plus = false; break;
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case '+': plus = true; break;
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default:
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error(1, errno, "%s:%zu:%zu: parse error, expected '-' or '+'",
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input_path, line, column);
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__builtin_unreachable();
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}
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parse_fixed("x -- '", input, input_path, &line, &column);
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while ( true )
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{
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int ic = fgetc_or_die_eof(input, input_path, &line, &column);
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if ( ic == '\'' )
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{
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ic = fgetc_or_die(input, input_path, &line, &column);
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if ( ic == EOF || ic == '\n' )
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break;
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ungetc(ic, input);
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parse_fixed("\\''", input, input_path, &line, &column);
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ic = '\'';
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}
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if ( buffer_used == buffer_length )
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{
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size_t new_length = buffer_length ? 2 * buffer_length : 16;
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buffer = (char*) realloc(buffer, sizeof(char) * (new_length + 1));
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buffer_length = new_length;
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}
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buffer[buffer_used++] = ic;
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}
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if ( !buffer_used )
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error(1, errno, "%s:%zu: unexpected empty path", input_path, line);
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assert(buffer_length);
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buffer[buffer_used] = '\0';
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if ( buffer[0] == '/' )
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error(1, errno, "%s:%zu: unexpected absolute path", input_path, line);
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if ( does_path_contain_dotdot(buffer) )
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error(1, errno, "%s:%zu: unexpected path with ..", input_path, line);
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if ( check )
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continue;
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struct stat st;
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if ( fstatat(AT_FDCWD, buffer, &st, AT_SYMLINK_NOFOLLOW) != 0 )
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{
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error(0, errno, "chmod %cx: `%s'", plus ? '+' : '-', buffer);
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result = false;
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continue;
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}
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mode_t new_mode = st.st_mode;
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if ( plus )
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new_mode |= 0111 & ~get_umask_value();
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else
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new_mode &= ~0111;
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if ( fchmodat(AT_FDCWD, buffer, new_mode, 0) != 0 )
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{
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error(0, errno, "chmod %cx: `%s'", plus ? '+' : '-', buffer);
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result = false;
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continue;
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}
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}
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return result;
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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]... [PATCH]\n", argv0);
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fprintf(fp, "Patches the executable bits of files in the current source directory.\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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bool check = false;
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char* directory = NULL;
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const char* argv0 = argv[0];
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for ( int i = 0; 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 'c': check = 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 ( !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 if ( !strcmp(arg, "--check") )
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check = true;
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else if ( GET_OPTION_VARIABLE("--directory", &directory) ) { }
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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 ( 2 < argc )
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error(1, 0, "extra operand");
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const char* input_path = "<stdin>";
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FILE* input = stdin;
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if ( argc == 2 )
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{
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input_path = argv[1];
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if ( !(input = fopen(input_path, "r")) )
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error(1, errno, "`%s'", input_path);
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}
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if ( directory && chdir(directory) != 0 )
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error(1, errno, "chdir: `%s'", directory);
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free(directory);
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return execpatch(input, input_path, check) ? 0 : 1;
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}
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