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page: check for gs failure

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This commit is contained in:
Russ Cox 2011-10-25 12:55:09 -04:00
parent b4d0ac9612
commit c383979b01
1 changed files with 8 additions and 0 deletions
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8
src/cmd/page/pdf.c
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@ -103,6 +103,14 @@ initpdf(Biobuf *b, int argc, char **argv, uchar *buf, int nbuf)
gscmd(&pdf->gs, "(%s) (r) file { DELAYSAFER { .setsafe } if } stopped pop pdfopen begin\n", fn);
gscmd(&pdf->gs, "pdfpagecount PAGE==\n");
p = Brdline(&pdf->gs.gsrd, '\n');
if(p == nil) {
if(Blinelen(&pdf->gs.gsrd) > 0) {
fprint(2, "unexpected output (too long) from gs\n");
return nil;
}
fprint(2, "early EOF from gs - is ghostscript installed?\n");
return nil;
}
npage = atoi(p);
if(npage < 1) {
fprint(2, "no pages?\n");