558 lines
12 KiB
C
Executable File
558 lines
12 KiB
C
Executable File
/*
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* mainloop.c
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* Iterating over all the command line parameters, and matching patterns
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* where needed
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*/
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#include "sysincludes.h"
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#include "msdos.h"
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#include "mtools.h"
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#include "vfat.h"
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#include "fs.h"
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#include "mainloop.h"
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#include "plain_io.h"
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#include "file.h"
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int unix_dir_loop(Stream_t *Stream, MainParam_t *mp);
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int unix_loop(Stream_t *Stream, MainParam_t *mp, char *arg,
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int follow_dir_link);
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static int _unix_loop(Stream_t *Dir, MainParam_t *mp, const char *filename)
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{
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unix_dir_loop(Dir, mp);
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return GOT_ONE;
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}
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int unix_loop(Stream_t *Stream, MainParam_t *mp, char *arg, int follow_dir_link)
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{
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int ret;
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int isdir;
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mp->File = NULL;
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mp->direntry = NULL;
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mp->unixSourceName = arg;
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/* mp->dir.attr = ATTR_ARCHIVE;*/
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mp->loop = _unix_loop;
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if((mp->lookupflags & DO_OPEN)){
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mp->File = SimpleFileOpen(0, 0, arg, O_RDONLY, 0, 0, 0, 0);
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if(!mp->File){
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perror(arg);
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#if 0
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tmp = _basename(arg);
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strncpy(mp->filename, tmp, VBUFSIZE);
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mp->filename[VBUFSIZE-1] = '\0';
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#endif
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return ERROR_ONE;
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}
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GET_DATA(mp->File, 0, 0, &isdir, 0);
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if(isdir) {
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struct stat buf;
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FREE(&mp->File);
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#ifdef S_ISLNK
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if(!follow_dir_link &&
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lstat(arg, &buf) == 0 &&
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S_ISLNK(buf.st_mode)) {
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/* skip links to directories in order to avoid
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* infinite loops */
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fprintf(stderr,
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"skipping directory symlink %s\n",
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arg);
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return 0;
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}
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#endif
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if(! (mp->lookupflags & ACCEPT_DIR))
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return 0;
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mp->File = OpenDir(Stream, arg);
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}
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}
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if(isdir)
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ret = mp->dirCallback(0, mp);
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else
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ret = mp->unixcallback(mp);
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FREE(&mp->File);
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return ret;
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}
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int isSpecial(const char *name)
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{
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if(name[0] == '\0')
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return 1;
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if(!strcmp(name,"."))
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return 1;
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if(!strcmp(name,".."))
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return 1;
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return 0;
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}
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static int checkForDot(int lookupflags, const char *name)
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{
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return (lookupflags & NO_DOTS) && isSpecial(name);
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}
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typedef struct lookupState_t {
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Stream_t *container;
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int nbContainers;
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Stream_t *Dir;
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int nbDirs;
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const char *filename;
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} lookupState_t;
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static int isUniqueTarget(const char *name)
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{
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return name && strcmp(name, "-");
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}
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static int handle_leaf(direntry_t *direntry, MainParam_t *mp,
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lookupState_t *lookupState)
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{
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Stream_t *MyFile=0;
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int ret;
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if(got_signal)
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return ERROR_ONE;
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if(lookupState) {
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/* we are looking for a "target" file */
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switch(lookupState->nbDirs) {
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case 0: /* no directory yet, open it */
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lookupState->Dir = OpenFileByDirentry(direntry);
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lookupState->nbDirs++;
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/* dump the container, we have
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* better now */
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FREE(&lookupState->container);
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return 0;
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case 1: /* we have already a directory */
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FREE(&lookupState->Dir);
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fprintf(stderr,"Ambigous\n");
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return STOP_NOW | ERROR_ONE;
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default:
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return STOP_NOW | ERROR_ONE;
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}
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}
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mp->direntry = direntry;
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if(IS_DIR(direntry)) {
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if(mp->lookupflags & (DO_OPEN | DO_OPEN_DIRS))
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MyFile = mp->File = OpenFileByDirentry(direntry);
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ret = mp->dirCallback(direntry, mp);
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} else {
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if(mp->lookupflags & DO_OPEN)
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MyFile = mp->File = OpenFileByDirentry(direntry);
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ret = mp->callback(direntry, mp);
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}
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FREE(&MyFile);
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if(isUniqueTarget(mp->targetName))
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ret |= STOP_NOW;
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return ret;
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}
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static int _dos_loop(Stream_t *Dir, MainParam_t *mp, const char *filename)
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{
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Stream_t *MyFile=0;
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direntry_t entry;
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int ret;
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int r;
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ret = 0;
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r=0;
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initializeDirentry(&entry, Dir);
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while(!got_signal &&
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(r=vfat_lookup(&entry, filename, -1,
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mp->lookupflags, mp->shortname,
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mp->longname)) == 0 ){
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mp->File = NULL;
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if(!checkForDot(mp->lookupflags,entry.name)) {
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MyFile = 0;
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if((mp->lookupflags & DO_OPEN) ||
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(IS_DIR(&entry) &&
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(mp->lookupflags & DO_OPEN_DIRS))) {
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MyFile = mp->File = OpenFileByDirentry(&entry);
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}
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if(got_signal)
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break;
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mp->direntry = &entry;
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if(IS_DIR(&entry))
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ret |= mp->dirCallback(&entry,mp);
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else
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ret |= mp->callback(&entry, mp);
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FREE(&MyFile);
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}
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if (fat_error(Dir))
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ret |= ERROR_ONE;
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if(mp->fast_quit && (ret & ERROR_ONE))
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break;
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}
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if (r == -2)
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return ERROR_ONE;
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if(got_signal)
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ret |= ERROR_ONE;
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return ret;
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}
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static int recurs_dos_loop(MainParam_t *mp, const char *filename0,
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const char *filename1,
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lookupState_t *lookupState)
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{
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/* Dir is de-allocated by the same entity which allocated it */
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const char *ptr;
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direntry_t entry;
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int length;
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int lookupflags;
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int ret;
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int have_one;
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int doing_mcwd;
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int r;
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while(1) {
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/* strip dots and // */
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if(!strncmp(filename0,"./", 2)) {
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filename0 += 2;
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continue;
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}
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if(!strcmp(filename0,".") && filename1) {
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filename0 ++;
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continue;
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}
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if(filename0[0] == '/') {
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filename0++;
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continue;
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}
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if(!filename0[0]) {
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if(!filename1)
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break;
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filename0 = filename1;
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filename1 = 0;
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continue;
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}
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break;
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}
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if(!strncmp(filename0,"../", 3) ||
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(!strcmp(filename0, "..") && filename1)) {
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/* up one level */
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mp->File = getDirentry(mp->File)->Dir;
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return recurs_dos_loop(mp, filename0+2, filename1, lookupState);
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}
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doing_mcwd = !!filename1;
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ptr = strchr(filename0, '/');
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if(!ptr) {
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length = strlen(filename0);
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ptr = filename1;
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filename1 = 0;
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} else {
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length = ptr - filename0;
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ptr++;
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}
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if(!ptr) {
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if(mp->lookupflags & OPEN_PARENT) {
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mp->targetName = filename0;
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ret = handle_leaf(getDirentry(mp->File), mp,
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lookupState);
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mp->targetName = 0;
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return ret;
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}
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if(!strcmp(filename0, ".") || !filename0[0]) {
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return handle_leaf(getDirentry(mp->File),
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mp, lookupState);
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}
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if(!strcmp(filename0, "..")) {
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return handle_leaf(getParent(getDirentry(mp->File)), mp,
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lookupState);
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}
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lookupflags = mp->lookupflags;
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if(lookupState) {
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lookupState->filename = filename0;
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if(lookupState->nbContainers + lookupState->nbDirs > 0){
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/* we have already one target, don't bother
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* with this one. */
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FREE(&lookupState->container);
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} else {
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/* no match yet. Remember this container for
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* later use */
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lookupState->container = COPY(mp->File);
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}
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lookupState->nbContainers++;
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}
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} else
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lookupflags = ACCEPT_DIR | DO_OPEN | NO_DOTS;
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ret = 0;
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r = 0;
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have_one = 0;
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initializeDirentry(&entry, mp->File);
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while(!(ret & STOP_NOW) &&
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!got_signal &&
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(r=vfat_lookup(&entry, filename0, length,
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lookupflags | NO_MSG,
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mp->shortname, mp->longname)) == 0 ){
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if(checkForDot(lookupflags, entry.name))
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/* while following the path, ignore the
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* special entries if they were not
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* explicitly given */
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continue;
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have_one = 1;
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if(ptr) {
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Stream_t *SubDir;
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SubDir = mp->File = OpenFileByDirentry(&entry);
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ret |= recurs_dos_loop(mp, ptr, filename1, lookupState);
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FREE(&SubDir);
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} else {
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ret |= handle_leaf(&entry, mp, lookupState);
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if(isUniqueTarget(mp->targetName))
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return ret | STOP_NOW;
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}
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if(doing_mcwd)
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break;
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}
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if (r == -2)
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return ERROR_ONE;
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if(got_signal)
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return ret | ERROR_ONE;
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if(doing_mcwd & !have_one)
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return NO_CWD;
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return ret;
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}
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static int common_dos_loop(MainParam_t *mp, const char *pathname,
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lookupState_t *lookupState, int open_mode)
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{
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Stream_t *RootDir;
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char *cwd;
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char *drive;
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char *rest;
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int ret;
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mp->loop = _dos_loop;
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drive='\0';
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cwd = "";
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if((rest = skip_drive(pathname)) > pathname) {
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drive = get_drive(pathname, NULL);
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if (strncmp(pathname, mp->mcwd, rest - pathname) == 0)
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cwd = skip_drive(mp->mcwd);
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pathname = rest;
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} else {
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drive = get_drive(mp->mcwd, NULL);
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cwd = skip_drive(mp->mcwd);
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}
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if(*pathname=='/') /* absolute path name */
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cwd = "";
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RootDir = mp->File = open_root_dir(drive, open_mode);
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if(!mp->File)
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return ERROR_ONE;
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ret = recurs_dos_loop(mp, cwd, pathname, lookupState);
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if(ret & NO_CWD) {
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/* no CWD */
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*mp->mcwd = '\0';
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unlink_mcwd();
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ret = recurs_dos_loop(mp, "", pathname, lookupState);
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}
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FREE(&RootDir);
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return ret;
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}
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static int dos_loop(MainParam_t *mp, const char *arg)
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{
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return common_dos_loop(mp, arg, 0, mp->openflags);
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}
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static int dos_target_lookup(MainParam_t *mp, const char *arg)
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{
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lookupState_t lookupState;
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int ret;
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int lookupflags;
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lookupState.nbDirs = 0;
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lookupState.Dir = 0;
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lookupState.nbContainers = 0;
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lookupState.container = 0;
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lookupflags = mp->lookupflags;
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mp->lookupflags = DO_OPEN | ACCEPT_DIR;
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ret = common_dos_loop(mp, arg, &lookupState, O_RDWR);
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mp->lookupflags = lookupflags;
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if(ret & ERROR_ONE)
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return ret;
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if(lookupState.nbDirs) {
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mp->targetName = 0;
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mp->targetDir = lookupState.Dir;
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FREE(&lookupState.container); /* container no longer needed */
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return ret;
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}
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switch(lookupState.nbContainers) {
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case 0:
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/* no match */
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fprintf(stderr,"%s: no match for target\n", arg);
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return MISSED_ONE;
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case 1:
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mp->targetName = strdup(lookupState.filename);
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mp->targetDir = lookupState.container;
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return ret;
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default:
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/* too much */
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fprintf(stderr, "Ambigous %s\n", arg);
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return ERROR_ONE;
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}
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}
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int unix_target_lookup(MainParam_t *mp, const char *arg)
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{
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char *ptr;
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mp->unixTarget = strdup(arg);
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/* try complete filename */
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if(access(mp->unixTarget, F_OK) == 0)
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return GOT_ONE;
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ptr = strrchr(mp->unixTarget, '/');
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if(!ptr) {
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mp->targetName = mp->unixTarget;
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mp->unixTarget = strdup(".");
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return GOT_ONE;
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} else {
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*ptr = '\0';
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mp->targetName = ptr+1;
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return GOT_ONE;
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}
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}
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int target_lookup(MainParam_t *mp, const char *arg)
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{
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if((mp->lookupflags & NO_UNIX) || skip_drive(arg) > arg)
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return dos_target_lookup(mp, arg);
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else
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return unix_target_lookup(mp, arg);
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}
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int main_loop(MainParam_t *mp, char **argv, int argc)
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{
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int i;
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int ret, Bret;
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Bret = 0;
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if(argc != 1 && mp->targetName) {
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fprintf(stderr,
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"Several file names given, but last argument (%s) not a directory\n", mp->targetName);
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}
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for (i = 0; i < argc; i++) {
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if ( got_signal )
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break;
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mp->originalArg = argv[i];
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mp->basenameHasWildcard = strpbrk(_basename(mp->originalArg),
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"*[?") != 0;
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if (mp->unixcallback && skip_drive(argv[i]) == argv[i])
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ret = unix_loop(0, mp, argv[i], 1);
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else
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ret = dos_loop(mp, argv[i]);
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if (! (ret & (GOT_ONE | ERROR_ONE)) ) {
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/* one argument was unmatched */
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fprintf(stderr, "%s: File \"%s\" not found\n",
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progname, argv[i]);
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ret |= ERROR_ONE;
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}
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Bret |= ret;
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if(mp->fast_quit && (Bret & (MISSED_ONE | ERROR_ONE)))
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break;
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}
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FREE(&mp->targetDir);
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if(Bret & ERROR_ONE)
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return 1;
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if ((Bret & GOT_ONE) && ( Bret & MISSED_ONE))
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return 2;
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if (Bret & MISSED_ONE)
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return 1;
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return 0;
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}
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static int dispatchToFile(direntry_t *entry, MainParam_t *mp)
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{
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if(entry)
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return mp->callback(entry, mp);
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else
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return mp->unixcallback(mp);
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}
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void init_mp(MainParam_t *mp)
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{
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fix_mcwd(mp->mcwd);
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mp->openflags = 0;
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mp->targetName = 0;
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mp->targetDir = 0;
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mp->unixTarget = 0;
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mp->dirCallback = dispatchToFile;
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mp->unixcallback = NULL;
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mp->shortname = mp->longname = 0;
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mp->File = 0;
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mp->fast_quit = 0;
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}
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const char *mpGetBasename(MainParam_t *mp)
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{
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if(mp->direntry)
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return mp->direntry->name;
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else
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return _basename(mp->unixSourceName);
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}
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void mpPrintFilename(FILE *fp, MainParam_t *mp)
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{
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if(mp->direntry)
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fprintPwd(fp, mp->direntry, 0);
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else
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fprintf(fp,"%s",mp->originalArg);
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}
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const char *mpPickTargetName(MainParam_t *mp)
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{
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/* picks the target name: either the one explicitly given by the
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* user, or the same as the source */
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if(mp->targetName)
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return mp->targetName;
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else
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return mpGetBasename(mp);
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}
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char *mpBuildUnixFilename(MainParam_t *mp)
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{
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const char *target;
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char *ret;
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target = mpPickTargetName(mp);
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ret = malloc(strlen(mp->unixTarget) + 2 + strlen(target));
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if(!ret)
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return 0;
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strcpy(ret, mp->unixTarget);
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if(*target) {
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#if 1 /* fix for 'mcopy -n x:file existingfile' -- H. Lermen 980816 */
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if(!mp->targetName && !mp->targetDir) {
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struct stat buf;
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if (!stat(ret, &buf) && !S_ISDIR(buf.st_mode))
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return ret;
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}
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#endif
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strcat(ret, "/");
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strcat(ret, target);
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}
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return ret;
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}
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