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https://github.com/netwide-assembler/nasm.git
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6867acc18e
Both C and C++ have "bool", "true" and "false" in lower case; C requires <stdbool.h> for this, in C++ it is an inherent type built into the compiler. Use those instead of the old macros; emulate with a simple typedef enum if unavailable.
462 lines
12 KiB
C
462 lines
12 KiB
C
/*
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* rdlar.c - new librarian/archiver for RDOFF2.
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* Copyright (c) 2002 RET & COM Research.
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*/
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#include "compiler.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <stdarg.h>
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#include <string.h>
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#include <errno.h>
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#include <time.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "rdlar.h"
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#define PROGRAM_VERSION "0.1"
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/** Constants **/
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const char commands[] = "adnrtx";
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const char modifiers[] = "cflouvV";
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/** Global variables **/
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char *progname = "rdlar";
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char **_argv = NULL;
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struct {
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bool createok;
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bool usefname;
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bool align;
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bool odate;
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bool fresh;
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int verbose;
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} options = {
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0, 0, 0, 0, 0, 0};
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#define _ENDIANNESS 0 /* 0 for little, 1 for big */
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/*
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* Convert int32_t to little endian (if we were compiled on big-endian machine)
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*/
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static void int32_ttolocal(int32_t *l)
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{
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#if _ENDIANNESS
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uint8_t t;
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uint8_t *p = (uint8_t *)l;
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t = p[0];
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p[0] = p[3];
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p[3] = t;
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t = p[1];
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p[1] = p[2];
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p[2] = p[1];
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#endif
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}
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/*
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* Print version information
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*/
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void show_version(void)
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{
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puts("New RDOFF2 librarian/archiver, version " PROGRAM_VERSION "\n"
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"Copyright (c) 2002 RET & COM Research.\n"
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"This program is free software and distributed under GPL (version 2 or later);\n"
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"see http://www.gnu.org/copyleft/gpl.html for details.");
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}
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/*
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* Print usage instructions
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*/
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void usage(void)
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{
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printf("Usage: %s [-]{%s}[%s] libfile [module-name] [files]\n",
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progname, commands, modifiers);
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puts(" commands:\n"
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" a - add module(s) to the library\n"
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" d - delete module(s) from the library\n"
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" n - create the library\n"
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" r - replace module(s)\n"
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" t - display contents of library\n"
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" x - extract module(s)\n"
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" command specific modifiers:\n"
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" o - preserve original dates\n"
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" u - only replace modules that are newer than library contents\n"
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" generic modifiers:\n"
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" c - do not warn if the library had to be created\n"
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" f - use file name as a module name\n"
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" v - be verbose\n"
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" V - display version information");
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}
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/*
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* Print an error message and exit
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*/
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void error_exit(int errcode, bool useperror, const char *fmt, ...)
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{
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va_list ap;
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fprintf(stderr, "%s: ", progname);
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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putc('\n', stderr);
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if (useperror)
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perror(progname);
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exit(errcode);
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}
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/*
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* Fill in and write a header
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*/
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void put_header(struct rdlm_hdr *hdr, FILE * libfp, char *modname)
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{
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int n = 0;
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hdr->hdrsize = sizeof(*hdr);
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if (modname)
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hdr->hdrsize += (n = strlen(modname) + 1);
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if (libfp == NULL)
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return;
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if (fwrite(hdr, 1, sizeof(*hdr), libfp) != sizeof(*hdr) ||
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(modname && (fwrite(modname, 1, n, libfp) != n)))
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error_exit(3, true, "could not write header");
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}
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/*
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* Copy n bytes from one file to another and return last character read.
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*/
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char copybytes(FILE * fp, FILE * fp2, int n)
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{
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int i, t = 0;
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for (i = 0; i < n; i++) {
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t = fgetc(fp);
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if (t == EOF)
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error_exit(1, false, "premature end of file in '%s'",
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_argv[2]);
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if (fp2)
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if (fputc(t, fp2) == EOF)
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error_exit(1, false, "write error");
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}
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return (char)t;
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}
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/*
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* Copy uint32_t from one file to another.
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* Return local presentation of int32_t.
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*/
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int32_t copyint32_t(FILE * fp, FILE * fp2)
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{
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int32_t l;
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int i, t;
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uint8_t *p = (uint8_t *)&l;
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for (i = 0; i < 4; i++) {
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t = fgetc(fp);
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if (t == EOF)
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error_exit(1, false, "premature end of file in '%s'",
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_argv[2]);
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if (fp2)
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if (fputc(t, fp2) == EOF)
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error_exit(1, false, "write error");
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*p++ = t;
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}
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int32_ttolocal(&l);
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return l;
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}
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/*
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* Create a new library
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*/
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int create_library(char *libname)
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{
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FILE *libfp;
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struct rdlm_hdr hdr;
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hdr.magic = RDLAMAG;
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hdr.hdrsize = 0;
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hdr.date = time(NULL);
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hdr.owner = getuid();
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hdr.group = getgid();
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hdr.mode = umask(022);
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hdr.size = 0;
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libfp = fopen(libname, "wb");
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if (!libfp)
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error_exit(1, true, "could not open '%s'\n", libname);
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/* Write library header */
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put_header(&hdr, libfp, NULL);
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fclose(libfp);
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return true;
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}
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/*
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* Add a module to the library
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*/
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int add_module(FILE * libfp, const char *fname, char *modname)
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{
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FILE *modfp;
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struct rdlm_hdr hdr = { RDLMMAG, 0, 0, 0, 0, 0, 0 };
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struct stat finfo;
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int i;
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if (options.verbose)
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fprintf(stderr, "adding module %s\n", modname);
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/* Initialize some fields in the module header */
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if (stat(fname, &finfo) < 0)
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error_exit(1, true, "could not stat '%s'", fname);
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hdr.date = finfo.st_mtime;
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hdr.owner = finfo.st_uid;
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hdr.group = finfo.st_gid;
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hdr.size = finfo.st_size;
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modfp = fopen(fname, "rb");
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if (!modfp)
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error_exit(1, true, "could not open '%s'", fname);
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/* Write module header */
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put_header(&hdr, libfp, modname);
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/* Put the module itself */
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while (!feof(modfp)) {
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i = fgetc(modfp);
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if (i == EOF)
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break;
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if (fputc(i, libfp) == EOF)
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error_exit(1, false, "write error");
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}
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fclose(modfp);
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return true;
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}
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/*
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* Main
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*/
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int main(int argc, char **argv)
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{
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FILE *libfp, *tmpfp, *modfp = NULL;
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struct stat finfo;
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struct rdlm_hdr hdr;
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char buf[MAXMODNAMELEN], *p = NULL;
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char c;
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int i;
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progname = argv[0];
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_argv = argv;
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if (argc < 2) {
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usage();
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exit(1);
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}
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/* Check whether some modifiers were specified */
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for (i = 1; i < strlen(argv[1]); i++) {
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switch (c = argv[1][i]) {
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case 'c':
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options.createok = true;
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break;
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case 'f':
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options.usefname = true;
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break;
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case 'l':
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options.align = true;
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break;
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case 'o':
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options.odate = true;
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break;
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case 'u':
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options.fresh = true;
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break;
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case 'v':
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options.verbose++;
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break;
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case 'V':
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show_version();
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exit(0);
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default:
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if (strchr(commands, c) == NULL)
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error_exit(2, false, "invalid command or modifier '%c'",
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c);
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}
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}
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if (argc < 3)
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error_exit(2, false, "missing library name");
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/* Process the command */
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if (argv[1][0] == '-')
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argv[1]++;
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switch (c = argv[1][0]) {
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case 'a': /* add a module */
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if (argc < 4 || (!options.usefname && argc != 5))
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error_exit(2, false, "invalid number of arguments");
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/* Check if a library already exists. If not - create it */
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if (access(argv[2], F_OK) < 0) {
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if (!options.createok)
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fprintf(stderr, "creating library %s\n", argv[2]);
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create_library(argv[2]);
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}
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libfp = fopen(argv[2], "ab");
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if (!libfp)
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error_exit(1, true, "could not open '%s'", argv[2]);
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if (!options.usefname)
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add_module(libfp, argv[4], argv[3]);
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else
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for (i = 3; i < argc; i++)
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add_module(libfp, argv[i], argv[i]);
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fclose(libfp);
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break;
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case 'n': /* create library */
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create_library(argv[2]);
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break;
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case 'x': /* extract module(s) */
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if (!options.usefname)
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argc--;
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if (argc < 4)
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error_exit(2, false, "required parameter missing");
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p = options.usefname ? argv[3] : argv[4];
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case 't': /* list library contents */
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libfp = fopen(argv[2], "rb");
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if (!libfp)
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error_exit(1, true, "could not open '%s'\n", argv[2]);
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/* Read library header */
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if (fread(&hdr, 1, sizeof(hdr), libfp) != sizeof(hdr) ||
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hdr.magic != RDLAMAG)
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error_exit(1, false, "invalid library format");
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/* Walk through the library looking for requested module */
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while (!feof(libfp)) {
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/* Read module header */
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i = fread(&hdr, 1, sizeof(hdr), libfp);
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if (feof(libfp))
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break;
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if (i != sizeof(hdr) || hdr.magic != RDLMMAG)
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error_exit(1, false, "invalid module header");
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/* Read module name */
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i = hdr.hdrsize - sizeof(hdr);
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if (i > sizeof(buf) || fread(buf, 1, i, libfp) != i)
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error_exit(1, false, "invalid module name");
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if (c == 'x') {
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/* Check against desired name */
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if (!strcmp(buf, argv[3])) {
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if (options.verbose)
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fprintf(stderr,
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"extracting module %s to file %s\n", buf,
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p);
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modfp = fopen(p, "wb");
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if (!modfp)
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error_exit(1, true, "could not open '%s'", p);
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}
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} else {
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printf("%-40s ", buf);
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if (options.verbose) {
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printf("%ld bytes", hdr.size);
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}
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putchar('\n');
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}
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copybytes(libfp, modfp, hdr.size);
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if (modfp)
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break;
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}
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fclose(libfp);
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if (modfp)
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fclose(modfp);
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else if (c == 'x')
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error_exit(1, false, "module '%s' not found in '%s'",
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argv[3], argv[2]);
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break;
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case 'r': /* replace module(s) */
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argc--;
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if (stat(argv[4], &finfo) < 0)
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error_exit(1, true, "could not stat '%s'", argv[4]);
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case 'd': /* delete module(s) */
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if (argc < 4)
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error_exit(2, false, "required parameter missing");
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libfp = fopen(argv[2], "rb");
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if (!libfp)
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error_exit(1, true, "could not open '%s'", argv[2]);
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/* Copy the library into a temporary file */
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tmpfp = tmpfile();
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if (!tmpfp)
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error_exit(1, true, "could not open temporary file");
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stat(argv[2], &finfo);
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copybytes(libfp, tmpfp, finfo.st_size);
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rewind(tmpfp);
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freopen(argv[2], "wb", libfp);
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/* Read library header and write it to a new file */
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if (fread(&hdr, 1, sizeof(hdr), tmpfp) != sizeof(hdr) ||
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hdr.magic != RDLAMAG)
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error_exit(1, false, "invalid library format");
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put_header(&hdr, libfp, NULL);
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/* Walk through the library looking for requested module */
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while (!feof(tmpfp)) {
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/* Read module header */
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if (fread(&hdr, 1, sizeof(hdr), tmpfp) != sizeof(hdr) ||
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hdr.magic != RDLMMAG)
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error_exit(1, false, "invalid module header");
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/* Read module name */
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i = hdr.hdrsize - sizeof(hdr);
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if (i > sizeof(buf) || fread(buf, 1, i, tmpfp) != i)
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error_exit(1, false, "invalid module name");
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/* Check against desired name */
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if (!strcmp(buf, argv[3]) &&
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(c == 'd' || !options.odate
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|| finfo.st_mtime <= hdr.date)) {
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if (options.verbose)
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fprintf(stderr, "deleting module %s\n", buf);
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fseek(tmpfp, hdr.size, SEEK_CUR);
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break;
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} else {
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put_header(&hdr, libfp, buf);
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copybytes(tmpfp, libfp, hdr.size);
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}
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}
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if (c == 'r') {
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/* Copy new module into library */
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p = options.usefname ? argv[4] : argv[3];
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add_module(libfp, argv[4], p);
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}
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/* Copy rest of library if any */
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while (!feof(tmpfp)) {
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if ((i = fgetc(tmpfp)) == EOF)
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break;
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if (fputc(i, libfp) == EOF)
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error_exit(1, false, "write error");
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}
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fclose(libfp);
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fclose(tmpfp);
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break;
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default:
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error_exit(2, false, "invalid command '%c'\n", c);
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}
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return 0;
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}
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