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qt-faststart: Check fseeko() return codes

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Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit 5612244351)
This commit is contained in:
Michael Niedermayer
2012-10-22 22:42:51 +02:00
committed by Reinhard Tartler
parent c9f015f1c6
commit 92edc13d69
1 changed files with 18 additions and 6 deletions
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24
tools/qt-faststart.c
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@@ -136,22 +136,27 @@ int main(int argc, char *argv[])
atom_size);
goto error_out;
}
fseeko(infile, -ATOM_PREAMBLE_SIZE, SEEK_CUR);
if (fread(ftyp_atom, atom_size, 1, infile) != 1) {
if (fseeko(infile, -ATOM_PREAMBLE_SIZE, SEEK_CUR) ||
fread(ftyp_atom, atom_size, 1, infile) != 1) {
perror(argv[1]);
goto error_out;
}
start_offset = ftello(infile);
} else {
int ret;
/* 64-bit special case */
if (atom_size == 1) {
if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
break;
}
atom_size = BE_64(&atom_bytes[0]);
fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE * 2, SEEK_CUR);
ret = fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE * 2, SEEK_CUR);
} else {
fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE, SEEK_CUR);
ret = fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE, SEEK_CUR);
}
if (ret) {
perror(argv[1]);
goto error_out;
}
}
printf("%c%c%c%c %10"PRIu64" %"PRIu64"\n",
@@ -192,7 +197,10 @@ int main(int argc, char *argv[])
/* moov atom was, in fact, the last atom in the chunk; load the whole
* moov atom */
fseeko(infile, -atom_size, SEEK_END);
if (fseeko(infile, -atom_size, SEEK_END)) {
perror(argv[1]);
goto error_out;
}
last_offset = ftello(infile);
moov_atom_size = atom_size;
moov_atom = malloc(moov_atom_size);
@@ -268,7 +276,11 @@ int main(int argc, char *argv[])
}
if (start_offset > 0) { /* seek after ftyp atom */
fseeko(infile, start_offset, SEEK_SET);
if (fseeko(infile, start_offset, SEEK_SET)) {
perror(argv[1]);
goto error_out;
}
last_offset -= start_offset;
}