//--------------------------------------------------------------------------
// Add a section (assume it doesn't already exist) - used for
// adding comment sections.
//--------------------------------------------------------------------------
Section_t * CreateSection(int SectionType, unsigned char * Data, int Size)
{
Section_t * NewSection;
int a;
// Insert it in third position - seems like a safe place to put
// things like comments.
if (SectionsRead < 2){
ErrFatal("Too few sections!");
}
if (SectionsRead >= MAX_SECTIONS){
ErrFatal("Too many sections!");
}
for (a=SectionsRead;a>2;a--){
Sections[a] = Sections[a-1];
}
SectionsRead += 1;
NewSection = Sections+2;
NewSection->Type = SectionType;
NewSection->Size = Size;
NewSection->Data = Data;
return NewSection;
}
//--------------------------------------------------------------------------
// Write image data back to disk.
//--------------------------------------------------------------------------
void WriteJpegFile(const char * FileName)
{
FILE * outfile;
int a;
if (!HaveAll){
ErrFatal("Can't write back - didn't read all");
}
outfile = fopen(FileName,"wb");
if (outfile == NULL){
ErrFatal("Could not open file for write");
}
// Initial static jpeg marker.
fputc(0xff,outfile);
fputc(0xd8,outfile);
if (Sections[0].Type != M_EXIF && Sections[0].Type != M_JFIF){
// The image must start with an exif or jfif marker. If we threw those away, create one.
static uchar JfifHead[18] = {
0xff, M_JFIF,
0x00, 0x10, 'J' , 'F' , 'I' , 'F' , 0x00, 0x01,
0x01, 0x01, 0x01, 0x2C, 0x01, 0x2C, 0x00, 0x00
};
if (ImageInfo.ResolutionUnit == 2 || ImageInfo.ResolutionUnit == 3){
// Use the exif resolution info to fill out the jfif header.
// Usually, for exif images, there's no jfif header, so if wediscard
// the exif header, use info from the exif header for the jfif header.
ImageInfo.JfifHeader.ResolutionUnits = (char)(ImageInfo.ResolutionUnit-1);
// Jfif is 1 and 2, Exif is 2 and 3 for In and cm respecively
ImageInfo.JfifHeader.XDensity = (int)ImageInfo.xResolution;
ImageInfo.JfifHeader.YDensity = (int)ImageInfo.yResolution;
}
JfifHead[11] = ImageInfo.JfifHeader.ResolutionUnits;
JfifHead[12] = (uchar)(ImageInfo.JfifHeader.XDensity >> 8);
JfifHead[13] = (uchar)ImageInfo.JfifHeader.XDensity;
JfifHead[14] = (uchar)(ImageInfo.JfifHeader.YDensity >> 8);
JfifHead[15] = (uchar)ImageInfo.JfifHeader.YDensity;
fwrite(JfifHead, 18, 1, outfile);
// use the values from the exif data for the jfif header, if we have found values
if (ImageInfo.ResolutionUnit != 0) {
// JFIF.ResolutionUnit is {1,2}, EXIF.ResolutionUnit is {2,3}
JfifHead[11] = (uchar)ImageInfo.ResolutionUnit - 1;
}
if (ImageInfo.xResolution > 0.0 && ImageInfo.yResolution > 0.0) {
JfifHead[12] = (uchar)((int)ImageInfo.xResolution>>8);
JfifHead[13] = (uchar)((int)ImageInfo.xResolution);
JfifHead[14] = (uchar)((int)ImageInfo.yResolution>>8);
JfifHead[15] = (uchar)((int)ImageInfo.yResolution);
}
}
//--------------------------------------------------------------------------
// Replace or remove exif thumbnail
//--------------------------------------------------------------------------
int ReplaceThumbnail(const char * ThumbFileName)
{
FILE * ThumbnailFile;
int ThumbLen, NewExifSize;
Section_t * ExifSection;
uchar * ThumbnailPointer;
if (ImageInfo.ThumbnailOffset == 0 || ImageInfo.ThumbnailAtEnd == FALSE){
// Adding or removing of thumbnail is not possible - that would require rearranging
// of the exif header, which is risky, and jhad doesn't know how to do.
printf("Image contains no thumbnail to replace - add is not possible\n");
return FALSE;
}
if (ThumbFileName){
ThumbnailFile = fopen(ThumbFileName,"rb");
if (ThumbnailFile == NULL){
ErrFatal("Could not read thumbnail file");
return FALSE;
}
// get length
fseek(ThumbnailFile, 0, SEEK_END);
ThumbLen = ftell(ThumbnailFile);
fseek(ThumbnailFile, 0, SEEK_SET);
if (ThumbLen + ImageInfo.ThumbnailOffset > 0x10000-20){
ErrFatal("Thumbnail is too large to insert into exif header");
}
}else{
ThumbLen = 0;
ThumbnailFile = NULL;
}
ExifSection = FindSection(M_EXIF);
NewExifSize = ImageInfo.ThumbnailOffset+8+ThumbLen;
ExifSection->Data = (uchar *)realloc(ExifSection->Data, NewExifSize);
ThumbnailPointer = ExifSection->Data+ImageInfo.ThumbnailOffset+8;
if (ThumbnailFile){
fread(ThumbnailPointer, ThumbLen, 1, ThumbnailFile);
fclose(ThumbnailFile);
}
ImageInfo.ThumbnailSize = ThumbLen;
Put32u(ExifSection->Data+ImageInfo.ThumbnailSizeOffset+8, ThumbLen);
ExifSection->Data[0] = (uchar)(NewExifSize >> 8);
ExifSection->Data[1] = (uchar)NewExifSize;
ExifSection->Size = NewExifSize;
return TRUE;
}
//--------------------------------------------------------------------------
// Check sections array to see if it needs to be increased in size.
//--------------------------------------------------------------------------
void CheckSectionsAllocated(void)
{
if (SectionsRead > SectionsAllocated){
ErrFatal("allocation screwup");
}
if (SectionsRead >= SectionsAllocated){
SectionsAllocated += SectionsAllocated/2;
Sections = (Section_t *)realloc(Sections, sizeof(Section_t)*SectionsAllocated);
if (Sections == NULL){
ErrFatal("could not allocate data for entire image");
}
}
}
//--------------------------------------------------------------------------
// Invoke an editor for editing a sting.
//--------------------------------------------------------------------------
static int FileEditComment(char * TempFileName, char * Comment, int CommentSize)
{
FILE * file;
int a;
char QuotedPath[300];
file = fopen(TempFileName, "w");
if (file == NULL){
fprintf(stderr, "Can't create file '%s'\n",TempFileName);
ErrFatal("could not create temporary file");
}
fwrite(Comment, CommentSize, 1, file);
fclose(file);
fflush(stdout); // So logs are contiguous.
{
char * Editor;
Editor = getenv("EDITOR");
if (Editor == NULL){
#ifdef _WIN32
Editor = "notepad";
#else
Editor = "vi";
#endif
}
sprintf(QuotedPath, "%s \"%s\"",Editor, TempFileName);
a = system(QuotedPath);
}
if (a != 0){
perror("Editor failed to launch");
exit(-1);
}
file = fopen(TempFileName, "r");
if (file == NULL){
ErrFatal("could not open temp file for read");
}
// Read the file back in.
CommentSize = fread(Comment, 1, 999, file);
fclose(file);
unlink(TempFileName);
return CommentSize;
}
//--------------------------------------------------------------------------
// Replace or remove exif thumbnail
//--------------------------------------------------------------------------
int SaveThumbnail(char * ThumbFileName)
{
FILE * ThumbnailFile;
if (ImageInfo.ThumbnailOffset == 0 || ImageInfo.ThumbnailSize == 0){
fprintf(stderr,"Image contains no thumbnail\n");
return FALSE;
}
if (strcmp(ThumbFileName, "-") == 0){
// A filename of '-' indicates thumbnail goes to stdout.
// This doesn't make much sense under Windows, so this feature is unix only.
ThumbnailFile = stdout;
}else{
ThumbnailFile = fopen(ThumbFileName,"wb");
}
if (ThumbnailFile){
uchar * ThumbnailPointer;
Section_t * ExifSection;
ExifSection = FindSection(M_EXIF);
ThumbnailPointer = ExifSection->Data+ImageInfo.ThumbnailOffset+8;
fwrite(ThumbnailPointer, ImageInfo.ThumbnailSize ,1, ThumbnailFile);
fclose(ThumbnailFile);
return TRUE;
}else{
ErrFatal("Could not write thumbnail file");
return FALSE;
}
}
//--------------------------------------------------------------------------
// Write image data back to disk.
//--------------------------------------------------------------------------
void WriteJpegFile(const char * FileName)
{
FILE * outfile;
int a;
if (!HaveAll){
ErrFatal("Can't write back - didn't read all");
}
outfile = fopen(FileName,"wb");
if (outfile == NULL){
ErrFatal("Could not open file for write");
}
// Initial static jpeg marker.
fputc(0xff,outfile);
fputc(0xd8,outfile);
if (Sections[0].Type != M_EXIF && Sections[0].Type != M_JFIF){
// The image must start with an exif or jfif marker. If we threw those away, create one.
static uchar JfifHead[18] = {
0xff, M_JFIF,
0x00, 0x10, 'J' , 'F' , 'I' , 'F' , 0x00, 0x01,
0x01, 0x01, 0x01, 0x2C, 0x01, 0x2C, 0x00, 0x00
};
fwrite(JfifHead, 18, 1, outfile);
}
// Write all the misc sections
for (a=0;a<SectionsRead-1;a++){
fputc(0xff,outfile);
fputc(Sections[a].Type, outfile);
fwrite(Sections[a].Data, Sections[a].Size, 1, outfile);
}
// Write the remaining image data.
fwrite(Sections[a].Data, Sections[a].Size, 1, outfile);
fclose(outfile);
}
//--------------------------------------------------------------------------
// Parse the marker stream until SOS or EOI is seen;
//--------------------------------------------------------------------------
int ReadJpegSections (FILE * infile, ReadMode_t ReadMode)
{
int a;
int HaveCom = FALSE;
a = fgetc(infile);
if (a != 0xff || fgetc(infile) != M_SOI){
return FALSE;
}
ImageInfo.JfifHeader.XDensity = ImageInfo.JfifHeader.YDensity = 300;
ImageInfo.JfifHeader.ResolutionUnits = 1;
for(;;){
int itemlen;
int prev;
int marker = 0;
int ll,lh, got;
uchar * Data;
CheckSectionsAllocated();
prev = 0;
for (a=0;;a++){
marker = fgetc(infile);
if (marker != 0xff && prev == 0xff) break;
prev = marker;
}
if (a > 10){
ErrNonfatal("Extraneous %d padding bytes before section %02X",a-1,marker);
}
Sections[SectionsRead].Type = marker;
// Read the length of the section.
lh = fgetc(infile);
ll = fgetc(infile);
itemlen = (lh << 8) | ll;
if (itemlen < 2){
ErrFatal("invalid marker");
}
Sections[SectionsRead].Size = itemlen;
Data = (uchar *)malloc(itemlen);
if (Data == NULL){
ErrFatal("Could not allocate memory");
}
Sections[SectionsRead].Data = Data;
// Store first two pre-read bytes.
Data[0] = (uchar)lh;
Data[1] = (uchar)ll;
got = fread(Data+2, 1, itemlen-2, infile); // Read the whole section.
if (got != itemlen-2){
ErrFatal("Premature end of file?");
}
SectionsRead += 1;
switch(marker){
case M_SOS: // stop before hitting compressed data
// If reading entire image is requested, read the rest of the data.
if (ReadMode & READ_IMAGE){
int cp, ep, size;
// Determine how much file is left.
cp = ftell(infile);
fseek(infile, 0, SEEK_END);
ep = ftell(infile);
fseek(infile, cp, SEEK_SET);
size = ep-cp;
Data = (uchar *)malloc(size);
if (Data == NULL){
ErrFatal("could not allocate data for entire image");
}
got = fread(Data, 1, size, infile);
if (got != size){
ErrFatal("could not read the rest of the image");
}
CheckSectionsAllocated();
Sections[SectionsRead].Data = Data;
Sections[SectionsRead].Size = size;
Sections[SectionsRead].Type = PSEUDO_IMAGE_MARKER;
SectionsRead ++;
HaveAll = 1;
}
return TRUE;
case M_EOI: // in case it's a tables-only JPEG stream
fprintf(stderr,"No image in jpeg!\n");
return FALSE;
case M_COM: // Comment section
if (HaveCom || ((ReadMode & READ_METADATA) == 0)){
// Discard this section.
free(Sections[--SectionsRead].Data);
}else{
process_COM(Data, itemlen);
HaveCom = TRUE;
}
break;
case M_JFIF:
// Regular jpegs always have this tag, exif images have the exif
// marker instead, althogh ACDsee will write images with both markers.
// this program will re-create this marker on absence of exif marker.
// hence no need to keep the copy from the file.
if (memcmp(Data+2, "JFIF\0",5)){
fprintf(stderr,"Header missing JFIF marker\n");
}
if (itemlen < 16){
fprintf(stderr,"Jfif header too short\n");
goto ignore;
}
ImageInfo.JfifHeader.Present = TRUE;
ImageInfo.JfifHeader.ResolutionUnits = Data[9];
ImageInfo.JfifHeader.XDensity = (Data[10]<<8) | Data[11];
ImageInfo.JfifHeader.YDensity = (Data[12]<<8) | Data[13];
if (ShowTags){
printf("JFIF SOI marker: Units: %d ",ImageInfo.JfifHeader.ResolutionUnits);
switch(ImageInfo.JfifHeader.ResolutionUnits){
case 0: printf("(aspect ratio)"); break;
case 1: printf("(dots per inch)"); break;
case 2: printf("(dots per cm)"); break;
default: printf("(unknown)"); break;
}
printf(" X-density=%d Y-density=%d\n",ImageInfo.JfifHeader.XDensity, ImageInfo.JfifHeader.YDensity);
if (Data[14] || Data[15]){
fprintf(stderr,"Ignoring jfif header thumbnail\n");
}
}
ignore:
free(Sections[--SectionsRead].Data);
break;
case M_EXIF:
// There can be different section using the same marker.
if (ReadMode & READ_METADATA){
if (memcmp(Data+2, "Exif", 4) == 0){
process_EXIF(Data, itemlen);
break;
}else if (memcmp(Data+2, "http:", 5) == 0){
Sections[SectionsRead-1].Type = M_XMP; // Change tag for internal purposes.
if (ShowTags){
printf("Image cotains XMP section, %d bytes long\n", itemlen);
if (ShowTags){
ShowXmp(Sections[SectionsRead-1]);
}
}
break;
}
}
// Oterwise, discard this section.
free(Sections[--SectionsRead].Data);
break;
case M_IPTC:
if (ReadMode & READ_METADATA){
if (ShowTags){
printf("Image cotains IPTC section, %d bytes long\n", itemlen);
}
// Note: We just store the IPTC section. Its relatively straightforward
// and we don't act on any part of it, so just display it at parse time.
}else{
free(Sections[--SectionsRead].Data);
}
break;
case M_SOF0:
case M_SOF1:
case M_SOF2:
case M_SOF3:
case M_SOF5:
case M_SOF6:
case M_SOF7:
case M_SOF9:
case M_SOF10:
case M_SOF11:
case M_SOF13:
case M_SOF14:
case M_SOF15:
process_SOFn(Data, marker);
break;
default:
// Skip any other sections.
if (ShowTags){
printf("Jpeg section marker 0x%02x size %d\n",marker, itemlen);
}
break;
}
}
return TRUE;
}
//--------------------------------------------------------------------------
// Parse the marker stream until SOS or EOI is seen;
//--------------------------------------------------------------------------
int ReadJpegSections (FILE * infile, ReadMode_t ReadMode)
{
int a;
int HaveCom = FALSE;
a = fgetc(infile);
if (a != 0xff || fgetc(infile) != M_SOI){
return FALSE;
}
for(;;){
int itemlen;
int marker = 0;
int ll,lh, got;
uchar * Data;
if (SectionsRead >= MAX_SECTIONS){
ErrFatal("Too many sections in jpg file");
}
for (a=0;a<7;a++){
marker = fgetc(infile);
if (marker != 0xff) break;
if (a >= 6){
printf("too many padding bytes\n");
return FALSE;
}
}
if (marker == 0xff){
// 0xff is legal padding, but if we get that many, something's wrong.
ErrFatal("too many padding bytes!");
}
Sections[SectionsRead].Type = marker;
// Read the length of the section.
lh = fgetc(infile);
ll = fgetc(infile);
itemlen = (lh << 8) | ll;
if (itemlen < 2){
ErrFatal("invalid marker");
}
Sections[SectionsRead].Size = itemlen;
Data = (uchar *)malloc(itemlen);
if (Data == NULL){
ErrFatal("Could not allocate memory");
}
Sections[SectionsRead].Data = Data;
// Store first two pre-read bytes.
Data[0] = (uchar)lh;
Data[1] = (uchar)ll;
got = fread(Data+2, 1, itemlen-2, infile); // Read the whole section.
if (got != itemlen-2){
ErrFatal("Premature end of file?");
}
SectionsRead += 1;
switch(marker){
case M_SOS: // stop before hitting compressed data
// If reading entire image is requested, read the rest of the data.
if (ReadMode & READ_IMAGE){
int cp, ep, size;
// Determine how much file is left.
cp = ftell(infile);
fseek(infile, 0, SEEK_END);
ep = ftell(infile);
fseek(infile, cp, SEEK_SET);
size = ep-cp;
Data = (uchar *)malloc(size);
if (Data == NULL){
ErrFatal("could not allocate data for entire image");
}
got = fread(Data, 1, size, infile);
if (got != size){
ErrFatal("could not read the rest of the image");
}
Sections[SectionsRead].Data = Data;
Sections[SectionsRead].Size = size;
Sections[SectionsRead].Type = PSEUDO_IMAGE_MARKER;
SectionsRead ++;
HaveAll = 1;
}
return TRUE;
case M_EOI: // in case it's a tables-only JPEG stream
printf("No image in jpeg!\n");
return FALSE;
case M_COM: // Comment section
if (HaveCom || ((ReadMode & READ_EXIF) == 0)){
// Discard this section.
free(Sections[--SectionsRead].Data);
}else{
process_COM(Data, itemlen);
HaveCom = TRUE;
}
break;
case M_JFIF:
// Regular jpegs always have this tag, exif images have the exif
// marker instead, althogh ACDsee will write images with both markers.
// this program will re-create this marker on absence of exif marker.
// hence no need to keep the copy from the file.
free(Sections[--SectionsRead].Data);
break;
case M_EXIF:
// Seen files from some 'U-lead' software with Vivitar scanner
// that uses marker 31 for non exif stuff. Thus make sure
// it says 'Exif' in the section before treating it as exif.
if ((ReadMode & READ_EXIF) && memcmp(Data+2, "Exif", 4) == 0){
process_EXIF(Data, itemlen);
}else{
// Discard this section.
free(Sections[--SectionsRead].Data);
}
break;
case M_SOF0:
case M_SOF1:
case M_SOF2:
case M_SOF3:
case M_SOF5:
case M_SOF6:
case M_SOF7:
case M_SOF9:
case M_SOF10:
case M_SOF11:
case M_SOF13:
case M_SOF14:
case M_SOF15:
process_SOFn(Data, marker);
break;
default:
// Skip any other sections.
if (ShowTags){
printf("Jpeg section marker 0x%02x size %d\n",marker, itemlen);
}
break;
}
}
return TRUE;
}
//--------------------------------------------------------------------------
// Do selected operations to one file at a time.
//--------------------------------------------------------------------------
void ProcessFile(const char * FileName)
{
int Modified = FALSE;
ReadMode_t ReadMode = READ_EXIF;
CurrentFile = FileName;
ResetJpgfile();
// Start with an empty image information structure.
memset(&ImageInfo, 0, sizeof(ImageInfo));
ImageInfo.FlashUsed = -1;
ImageInfo.MeteringMode = -1;
// Store file date/time.
{
struct stat st;
if (stat(FileName, &st) >= 0){
ImageInfo.FileDateTime = st.st_mtime;
ImageInfo.FileSize = st.st_size;
}else{
ErrFatal("No such file");
}
}
strncpy(ImageInfo.FileName, FileName, PATH_MAX);
if (ApplyCommand){
// Applying a command is special - the headers from the file have to be
// pre-read, then the command executed, and then the image part of the file read.
if (!ReadJpegFile(FileName, READ_EXIF)) return;
#ifdef MATTHIAS
if (AutoResize){
// Automatic resize computation - to customize for each run...
if (AutoResizeCmdStuff() == 0){
DiscardData();
return;
}
}
#endif // MATTHIAS
if (CheckFileSkip()){
DiscardData();
return;
}
DiscardAllButExif();
DoCommand(FileName);
Modified = TRUE;
ReadMode = READ_IMAGE; // Don't re-read exif section again on next read.
}else if (ExifXferScrFile){
char RelativeExifName[PATH_MAX+1];
// Make a relative name.
RelativeName(RelativeExifName, ExifXferScrFile, FileName);
if(!ReadJpegFile(RelativeExifName, READ_EXIF)) return;
DiscardAllButExif(); // Don't re-read exif section again on next read.
Modified = TRUE;
ReadMode = READ_IMAGE;
}
FilesMatched += 1;
FilesMatched = TRUE; // Turns off complaining that nothing matched.
if (DoModify){
ReadMode |= READ_IMAGE;
}
if (!ReadJpegFile(FileName, ReadMode)) return;
if (CheckFileSkip()){
DiscardData();
return;
}
if (ShowConcise){
ShowConciseImageInfo();
}else{
if (!(DoModify || DoReadAction) || ShowTags){
if (DoN3) {
ShowImageInfoInN3();
} else {
ShowImageInfo();
}
}
}
if (ThumbnailName){
if (ImageInfo.ThumbnailPointer){
FILE * ThumbnailFile;
char OutFileName[PATH_MAX+1];
// Make a relative name.
RelativeName(OutFileName, ThumbnailName, FileName);
#ifndef _WIN32
if (strcmp(ThumbnailName, "-") == 0){
// A filename of '-' indicates thumbnail goes to stdout.
// This doesn't make much sense under Windows, so this feature is unix only.
ThumbnailFile = stdout;
}else
#endif
{
ThumbnailFile = fopen(OutFileName,"wb");
}
if (ThumbnailFile){
fwrite(ImageInfo.ThumbnailPointer, ImageInfo.ThumbnailSize ,1, ThumbnailFile);
fclose(ThumbnailFile);
if (ThumbnailFile != stdout){
printf("Created: '%s'\n", OutFileName);
}else{
// No point in printing to stdout when that is where the thumbnail goes!
}
}else{
ErrFatal("Could not write thumbnail file");
}
}else{
printf("Image '%s' contains no thumbnail\n",FileName);
}
}
#ifdef MATTHIAS
if (EditComment || CommentInsertfileName || AddComment || RemComment){
#else
if (EditComment || CommentInsertfileName){
#endif
Section_t * CommentSec;
char Comment[1000];
int CommentSize;
CommentSec = FindSection(M_COM);
if (CommentSec == NULL){
unsigned char * DummyData;
DummyData = (uchar *) malloc(3);
DummyData[0] = 0;
DummyData[1] = 2;
DummyData[2] = 0;
CommentSec = CreateSection(M_COM, DummyData, 2);
}
CommentSize = CommentSec->Size-2;
if (CommentInsertfileName){
// Read a new comment section from file.
char CommentFileName[PATH_MAX+1];
FILE * CommentFile;
// Make a relative name.
RelativeName(CommentFileName, CommentInsertfileName, FileName);
CommentFile = fopen(CommentFileName,"r");
if (CommentFile == NULL){
printf("Could not open '%s'\n",CommentFileName);
}else{
// Read it in.
// Replace the section.
CommentSize = fread(Comment, 1, 999, CommentFile);
fclose(CommentFile);
if (CommentSize < 0) CommentSize = 0;
}
}else{
#ifdef MATTHIAS
if (ModifyDescriptComment(Comment, (char *)CommentSec->Data+2)){
Modified = TRUE;
CommentSize = strlen(Comment);
}
if (EditComment)
#else
memcpy(Comment, (char *)CommentSec->Data+2, CommentSize);
#endif
{
char EditFileName[PATH_MAX+4];
strcpy(EditFileName, FileName);
strcat(EditFileName, ".txt");
CommentSize = FileEditComment(EditFileName, Comment, CommentSize);
}
}
if (strcmp(Comment, (char *)CommentSec->Data+2)){
// Discard old comment section and put a new one in.
int size;
size = CommentSize+2;
free(CommentSec->Data);
CommentSec->Size = size;
CommentSec->Data = malloc(size);
CommentSec->Data[0] = (uchar)(size >> 8);
CommentSec->Data[1] = (uchar)(size);
memcpy((CommentSec->Data)+2, Comment, size-2);
Modified = TRUE;
}
if (!Modified){
printf("Comment not modified\n");
}
}
//--------------------------------------------------------------------------
// Apply the specified command to the jpeg file.
//--------------------------------------------------------------------------
static void DoCommand(const char * FileName)
{
int a,e;
char ExecString[400];
char TempName[200];
int TempUsed = FALSE;
e = 0;
// Make a temporary file in the destination directory by changing last char.
strcpy(TempName, FileName);
a = strlen(TempName)-1;
TempName[a] = TempName[a] == 't' ? 'z' : 't';
// Build the exec string. &i and &o in the exec string get replaced by input and output files.
for (a=0;;a++){
if (ApplyCommand[a] == '&'){
if (ApplyCommand[a+1] == 'i'){
// Input file.
if (strstr(FileName, " ")){
e += sprintf(ExecString+e, "\"%s\"",FileName);
}else{
// No need for quoting (that way I can put a relative path in front)
e += sprintf(ExecString+e, "%s",FileName);
}
a += 1;
continue;
}
if (ApplyCommand[a+1] == 'o'){
// Needs an output file distinct from the input file.
e += sprintf(ExecString+e, "\"%s\"",TempName);
a += 1;
TempUsed = TRUE;
unlink(TempName);// Remove any pre-existing temp file
continue;
}
}
ExecString[e++] = ApplyCommand[a];
if (ApplyCommand[a] == 0) break;
}
printf("Cmd:%s\n",ExecString);
errno = 0;
a = system(ExecString);
if (a || errno){
// A command can however fail without errno getting set or system returning an error.
if (errno) perror("system");
ErrFatal("Problem executing specified command");
}
if (TempUsed){
// Don't delete original file until we know a new one was created by the command.
struct stat dummy;
if (stat(TempName, &dummy) == 0){
unlink(FileName);
rename(TempName, FileName);
}else{
ErrFatal("specified command did not produce expected output file");
}
}
}
