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/*****************************************************************************
gifinto - save GIF on stdin to file if size over set threshold
SPDX-License-Identifier: MIT
*****************************************************************************/
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <stdbool.h>
#ifdef _WIN32
#include <io.h>
#else
#include <unistd.h>
#endif /* _WIN32 */
#include "gif_lib.h"
#include "getarg.h"
#define PROGRAM_NAME "gifinto"
#define STRLEN 512
#define DEFAULT_MIN_FILE_SIZE 14 /* More than GIF stamp + screen desc. */
#define DEFAULT_OUT_NAME "GifInto.Gif"
#define DEFAULT_TMP_NAME "TempInto.XXXXXX"
__attribute__((__section__(".tizen.build-id")))
static char
VersionStr[] =
PROGRAM_NAME
VERSION_COOKIE
" Gershon Elber, "
__DATE__ ", " __TIME__ "\n"
"(C) Copyright 1989 Gershon Elber.\n";
static char
*CtrlStr =
PROGRAM_NAME
" v%- s%-MinFileSize!d h%- GifFile!*s";
static int
MinFileSize = DEFAULT_MIN_FILE_SIZE;
#ifdef _WIN32
#include <errno.h>
#include <sys/stat.h>
int
mkstemp(char *tpl)
{
int fd = -1;
char *p;
int e = errno;
errno = 0;
p = _mktemp(tpl);
if (*p && errno == 0)
{
errno = e;
fd = _open(p, _O_RDWR | _O_CREAT | _O_EXCL | _O_BINARY,
_S_IREAD | _S_IWRITE);
}
return fd;
}
#endif
/******************************************************************************
This is simply: read until EOF, then close the output, test its length, and
if non zero then rename it.
******************************************************************************/
int main(int argc, char **argv)
{
int FD;
int NumFiles;
bool Error, MinSizeFlag = false, HelpFlag = false;
char **FileName = NULL, FoutTmpName[STRLEN+1], FullPath[STRLEN+1], *p;
FILE *Fin, *Fout;
if ((Error = GAGetArgs(argc, argv, CtrlStr, &GifNoisyPrint,
&MinSizeFlag, &MinFileSize, &HelpFlag,
&NumFiles, &FileName)) != false ||
(NumFiles > 1 && !HelpFlag)) {
if (Error)
GAPrintErrMsg(Error);
else if (NumFiles != 1)
GIF_MESSAGE("Error in command line parsing - one GIF file please.");
GAPrintHowTo(CtrlStr);
exit(EXIT_FAILURE);
}
if (HelpFlag) {
(void)fprintf(stderr, VersionStr, GIFLIB_MAJOR, GIFLIB_MINOR);
GAPrintHowTo(CtrlStr);
exit(EXIT_SUCCESS);
}
/* Open the stdin in binary mode and increase its buffer size: */
#ifdef _WIN32
_setmode(0, O_BINARY); /* Make sure it is in binary mode. */
#endif
Fin = fdopen(0, "rb"); /* Make it into a stream: */
if (Fin == NULL)
{
GIF_EXIT("Failed to open input.");
}
/* Isolate the directory where our destination is, and set tmp file name */
/* in the very same directory. This code is isecure because it creates */
/* predictable names, but it's not worth the effort and risk to fix. */
if ( *FileName == NULL ) GIF_EXIT("No valid Filename given.");
if ( strlen(*FileName) > STRLEN-1 ) GIF_EXIT("Filename too long.");
memset(FullPath, '\0', sizeof(FullPath));
strncpy(FullPath, *FileName, STRLEN);
if ((p = strrchr(FullPath, '/')) != NULL ||
(p = strrchr(FullPath, '\\')) != NULL)
p[1] = 0;
else if ((p = strrchr(FullPath, ':')) != NULL)
p[1] = 0;
else
FullPath[0] = 0; /* No directory or disk specified. */
if ( strlen(FullPath) > STRLEN-1 ) GIF_EXIT("Filename too long.");
strncpy(FoutTmpName, FullPath, STRLEN); /* First setup the Path */
/* then add a name for the tempfile */
if ( (strlen(FoutTmpName) + strlen(DEFAULT_TMP_NAME)) > STRLEN-1 ) GIF_EXIT("Filename too long.");
strcat(FoutTmpName, DEFAULT_TMP_NAME);
#ifdef _WIN32
char *tmpFN = _mktemp(FoutTmpName);
if (tmpFN)
FD = open(tmpFN, O_CREAT | O_EXCL | O_WRONLY);
else
FD = -1;
#else
FD = mkstemp(FoutTmpName); /* returns filedescriptor */
#endif
if (FD == -1 )
{
GIF_EXIT("Failed to open output.");
}
Fout = fdopen(FD, "wb"); /* returns a stream with FD */
if (Fout == NULL )
{
GIF_EXIT("Failed to open output.");
}
while (1) {
int c = getc(Fin);
if (feof(Fin))
break;
if (putc(c, Fout) == EOF)
GIF_EXIT("Failed to write output.");
}
fclose(Fin);
if (ftell(Fout) >= (long) MinFileSize) {
fclose(Fout);
unlink(*FileName);
if (rename(FoutTmpName, *FileName) != 0) {
char DefaultName[STRLEN+1];
memset(DefaultName, '\0', sizeof(DefaultName));
if ( (strlen(FullPath) + strlen(DEFAULT_OUT_NAME)) > STRLEN-1 ) GIF_EXIT("Filename too long.");
strncpy(DefaultName, FullPath, STRLEN);
strcat(DefaultName, DEFAULT_OUT_NAME);
if (rename(FoutTmpName, DefaultName) == 0) {
char s[STRLEN];
snprintf(s, STRLEN, "Failed to rename out file - left as %s.",
DefaultName);
GIF_MESSAGE(s);
}
else {
unlink(FoutTmpName);
GIF_MESSAGE("Failed to rename out file - deleted.");
}
}
}
else {
fclose(Fout);
unlink(FoutTmpName);
GIF_MESSAGE("File too small - not renamed.");
}
return 0;
}
/* end */
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