doc-build fails

[Ralf Hemmecke]

Oh, there seems to be a problem with my current OS installation (xubuntu
26.04). When I compile the fricas documentation, it ends in the following.

Any hints of how to fix this? Obviously a Ghostscript problem. :-(

Ralf

PS: Oh, that seems to be a problem with the ramdisk (which is my build
directory).

$ cd /dev/shm/hemmecke/fricas/b/src/doc/tmp/knot3.VIEW
$ epstopdf image.ps foo1.pdf
GPL Ghostscript 10.06.0: **** Could not open the file foo1.pdf .
**** Unable to open the initial device, quitting.
$ epstopdf image.ps ~/foo1.pdf
# No problem with the last command. And the output is fine.

I have no idea how to fix that problem.

Hmmm... the same setup worked fine on xubuntu 24.04.

====================================================================

echo timestamp > tmp/stamp-ug10
echo timestamp > tmp/stamp-ug08
echo timestamp > tmp/stamp-ug01
mkdir -p tmp
cat tmp/ZDSOLVE.spool | gawk -f
/home/hemmecke/g/fricas-bisect/fricas/src/doc/spool2tex.awk >
tmp/ZDSOLVE.tex
mkdir -p tmp
cat tmp/LEXTRIPK.spool | gawk -f
/home/hemmecke/g/fricas-bisect/fricas/src/doc/spool2tex.awk >
tmp/LEXTRIPK.tex
echo timestamp > tmp/stamp-ug07
echo timestamp > stamp-book-viewports
cp /home/hemmecke/g/fricas-bisect/fricas/src/doc/png/*.png tmp/
for f in tmp/*.VIEW/image.ps; do \
epstopdf $f --outfile=`echo $f | sed 's/VIEW.*/pdf/'`; \
done
GPL Ghostscript 10.06.0: **** Could not open the file tmp/23DColA.pdf .
**** Unable to open the initial device, quitting.
epstopdf ($Id: epstopdf.pl 71777 2024-07-11 21:24:57Z karl $) 2.36
!!! Error: Writing to gs failed, error code 1

GPL Ghostscript 10.06.0: **** Could not open the file tmp/23DColB.pdf .
**** Unable to open the initial device, quitting.
epstopdf ($Id: epstopdf.pl 71777 2024-07-11 21:24:57Z karl $) 2.36
!!! Error: Writing to gs failed, error code 1

[Waldek Hebisch]

On Thu, May 28, 2026 at 10:10:09PM +0200, 'Ralf Hemmecke' via FriCAS - computer algebra system wrote:
> Oh, there seems to be a problem with my current OS installation (xubuntu
> 26.04). When I compile the fricas documentation, it ends in the following.
>
> Any hints of how to fix this? Obviously a Ghostscript problem. :-(
>
> Ralf
>
> PS: Oh, that seems to be a problem with the ramdisk (which is my build
> directory).
>
> $ cd /dev/shm/hemmecke/fricas/b/src/doc/tmp/knot3.VIEW
> $ epstopdf image.ps foo1.pdf
> GPL Ghostscript 10.06.0: **** Could not open the file foo1.pdf .
> **** Unable to open the initial device, quitting.
> $ epstopdf image.ps ~/foo1.pdf
> # No problem with the last command. And the output is fine.

Silly question: do you have enough space on the ramdisk?

To get more info you could try 'strace', like

strace -o rap1 epstopdf image.ps foo1.pdf
strace -o rap2 epstopdf image.ps ~/foo1.pdf

and look what is different.

--
Waldek Hebisch

[Ralf Hemmecke]

On 5/28/26 22:56, Waldek Hebisch wrote:
> Silly question: do you have enough space on the ramdisk?

Not so silly. Indeed I haven't considered this.

$ df .
Filesystem 1K-blocks Used Available Use% Mounted on
tmpfs 16257884 905216 15352668 6% /dev/shm

$ epstopdf image.ps foo1.pdf
GPL Ghostscript 10.06.0: **** Could not open the file foo1.pdf .
**** Unable to open the initial device, quitting.

That should be enough, I guess.

> To get more info you could try 'strace', like
>
> strace -o rap1 epstopdf image.ps foo1.pdf
> strace -o rap2 epstopdf image.ps ~/foo1.pdf
>
> and look what is different.

All differences look just like address differences, except the last.

See end of "diff -u rap1 rap2" below.

==========(from rap2)
write(4, "oly\n\t0.914724\t0.232519\t0.914724\t"..., 8192) = -1 EPIPE
(Broken pipe)
--- SIGPIPE {si_signo=SIGPIPE, si_code=SI_USER, si_pid=309633,
si_uid=1000} ---
+++ killed by SIGPIPE +++
==========

Well, looks like a problem, but what can I do to avoid it?

Ralf


@@ -888,7 +888,7 @@
read(6, "", 4) = 0
close(6) = 0
fcntl(4, F_SETFD, FD_CLOEXEC) = 0
-ioctl(4, TCGETS2, 0x7ffc34cb8c40) = -1 ENOTTY (Inappropriate
ioctl for device)
+ioctl(4, TCGETS2, 0x7fff1a76f8a0) = -1 ENOTTY (Inappropriate
ioctl for device)
lseek(4, 0, SEEK_CUR) = -1 ESPIPE (Illegal seek)
read(3, "%!PS-Adobe-2.0\n%%BoundingBox: 0 "..., 8192) = 8192
write(4, "%!PS-Adobe-2.0\n%%BoundingBox: 0 "..., 8192) = 8192
@@ -907,6 +907,252 @@
read(3, "0.679857\t0.956737\tsetrgbcolor\n\t2"..., 8192) = 8192
write(4, "\t303\t107\n\t281\t108\n\t303\t103\n\t4\t30"..., 8192) = 8192
read(3, "4\n\t100\t200\n\t4\t105\t200\tpsColorPol"..., 8192) = 8192
-write(4, "oly\n\t0.914724\t0.232519\t0.914724\t"..., 8192) = -1 EPIPE
(Broken pipe)
---- SIGPIPE {si_signo=SIGPIPE, si_code=SI_USER, si_pid=309633,
si_uid=1000} ---
-+++ killed by SIGPIPE +++
+write(4, "oly\n\t0.914724\t0.232519\t0.914724\t"..., 8192) = 8192
+read(3, "736\t0.957415\tsetrgbcolor\n\t82\t192"..., 8192) = 8192
+write(4, "197\n\t330\t210\n\t315\t201\n\t4\t315\t197"..., 8192) = 8192
+read(3, "rgbcolor\n\t92\t117\n\t80\t143\n\t87\t116"..., 8192) = 8192
+write(4, "1\t201\n\t4\t125\t199\tpsColorPoly\n\t0."..., 8192) = 8192
+read(3, "94\n\t131\t188\n\t4\t135\t190\tpsColorPo"..., 8192) = 8192
+write(4, "Poly\n\t0.597446\t0.137385\t0.904154"..., 8192) = 8192
+read(3, "0.923979\tsetrgbcolor\n\t136\t195\n\t1"..., 8192) = 8192
+write(4, "45\n\t211\t58\n\t233\t44\n\t4\t236\t45\tpsC"..., 8192) = 8192
+read(3, "39\t0.095707\t0.861365\tsetrgbcolor"..., 8192) = 8192
+write(4, "or\n\t346\t188\n\t334\t182\n\t350\t188\n\t4"..., 8192) = 8192
+read(3, "ColorPoly\n\t0.835594\t0.430901\t0.9"..., 8192) = 8192
+write(4, ".916595\tsetrgbcolor\n\t136\t195\n\t13"..., 8192) = 8192
+read(3, "\t182\t41\n\t165\t61\n\t186\t44\n\t4\t182\t4"..., 8192) = 8192
+write(4, "132\t188\tpsColorPoly\n\t0.672844\t0."..., 8192) = 8192
+read(3, "\t148\n\t4\t344\t144\tpsColorPoly\n\t0.4"..., 8192) = 8192
+write(4, ".454982\t0.842550\t0.939442\tsetrgb"..., 8192) = 8192
+read(3, "215198\t0.494239\t0.912800\tsetrgbc"..., 8192) = 8192
+write(4, "etrgbcolor\n\t60\t174\n\t61\t146\n\t60\t1"..., 8192) = 8192
+read(3, "0.865513\tsetrgbcolor\n\t177\t160\n\t1"..., 8192) = 8192
+write(4, "\t174\t163\n\t167\t163\n\t4\t163\t161\tpsC"..., 8192) = 8192
+read(3, "\t0.393930\t0.717167\t0.932659\tsetr"..., 8192) = 8192
+write(4, "9\tsetrgbcolor\n\t55\t175\n\t53\t145\n\t5"..., 8192) = 8192
+read(3, "2804\t0.926346\tsetrgbcolor\n\t230\t1"..., 8192) = 8192
+write(4, "\t147\n\t216\t148\n\t208\t144\n\t4\t209\t14"..., 8192) = 8192
+read(3, "186\n\t253\t176\n\t4\t257\t174\tpsColorP"..., 8192) = 8192
+write(4, "rPoly\n\t0.543757\t0.705976\t0.94930"..., 8192) = 8192
+read(3, "0.936213\tsetrgbcolor\n\t126\t205\n\t1"..., 8192) = 8192
+write(4, "\t170\t160\n\t164\t161\n\t4\t160\t164\tpsC"..., 8192) = 8192
+read(3, "731272\t0.583008\t0.953668\tsetrgbc"..., 8192) = 8192
+write(4, "etrgbcolor\n\t54\t236\n\t63\t260\n\t50\t2"..., 8192) = 8192
+read(3, "olorPoly\n\t0.424950\t0.424950\t0.93"..., 8192) = 8192
+write(4, "4\t0.619671\tsetrgbcolor\n\t138\t43\n\t"..., 8192) = 8192
+read(3, "r\n\t129\t262\n\t119\t263\n\t128\t267\n\t4\t"..., 8192) = 8192
+write(4, "4\t119\t263\tpsColorPoly\n\t0.733104\t"..., 8192) = 8192
+read(3, "\t213\t147\n\t205\t137\n\t213\t144\n\t4\t21"..., 8192) = 8192
+write(4, "208\t134\tpsColorPoly\n\t0.370246\t0."..., 8192) = 8192
+read(3, "4\t0.563564\tsetrgbcolor\n\t210\t26\n\t"..., 8192) = 8192
+write(4, "0\t24\n\t210\t26\n\t231\t19\n\t4\t230\t24\tp"..., 8192) = 8192
+read(3, "bcolor\n\t364\t237\n\t352\t226\n\t360\t23"..., 8192) = 8192
+write(4, "279\n\t4\t133\t283\tpsColorPoly\n\t0.13"..., 8192) = 8192
+read(3, "bcolor\n\t245\t155\n\t236\t150\n\t243\t15"..., 8192) = 8192
+write(4, "148\n\t4\t230\t151\tpsColorPoly\n\t0.15"..., 8192) = 8192
+read(3, "59\n\t261\t246\n\t4\t262\t245\tpsColorPo"..., 8192) = 8192
+write(4, "Poly\n\t0.282342\t0.282342\t0.920260"..., 8192) = 8192
+read(3, "58\t0.938106\tsetrgbcolor\n\t221\t306"..., 8192) = 8192
+write(4, "00\n\t225\t309\n\t234\t297\n\t4\t237\t300\t"..., 8192) = 8192
+read(3, "331\n\t223\t343\n\t4\t219\t340\tpsColorP"..., 8192) = 8192
+write(4, "rPoly\n\t0.929631\t0.366681\t0.92963"..., 8192) = 8192
+read(3, "0\t0.914526\t0.914526\tsetrgbcolor\n"..., 8192) = 8192
+write(4, "olor\n\t339\t96\n\t357\t102\n\t342\t99\n\t4"..., 8192) = 8192
+read(3, "\t255\n\t140\t253\n\t147\t254\n\t4\t143\t25"..., 8192) = 8192
+write(4, "253\tpsColorPoly\n\t0.098835\t0.2569"..., 8192) = 8192
+read(3, "023\t0.557794\t0.950866\tsetrgbcolo"..., 8192) = 8192
+write(4, "lor\n\t206\t297\n\t193\t305\n\t204\t297\n\t"..., 8192) = 8192
+read(3, "2\t275\n\t257\t262\n\t4\t255\t263\tpsColo"..., 8192) = 8192
+write(4, "lorPoly\n\t0.111860\t0.111860\t0.901"..., 8192) = 8192
+read(3, "83\t0.912401\tsetrgbcolor\n\t134\t226"..., 8192) = 8192
+write(4, "34\n\t138\t227\n\t143\t230\n\t4\t145\t234\t"..., 8192) = 8192
+read(3, "\t135\n\t4\t170\t139\tpsColorPoly\n\t0.9"..., 8192) = 8192
+write(4, ".389208\t0.903559\t0.132032\tsetrgb"..., 8192) = 8192
+read(3, "\n\t189\t289\n\t181\t299\n\t192\t293\n\t4\t1"..., 8192) = 8192
+write(4, "\t181\t299\tpsColorPoly\n\t0.683925\t0"..., 8192) = 8192
+read(3, "233\t0.381093\tsetrgbcolor\n\t368\t14"..., 8192) = 8192
+write(4, "286\n\t195\t294\n\t206\t287\n\t4\t203\t286"..., 8192) = 8192
+read(3, "21\n\t245\t15\n\t225\t16\n\t4\t224\t21\tpsC"..., 8192) = 8192
+write(4, "44\tpsColorPoly\n\t0.951616\t0.71937"..., 8192) = 8192
+read(3, "\t170\t118\n\t179\t122\n\t4\t179\t127\tpsC"..., 8192) = 8192
+write(4, "sColorPoly\n\t0.665515\t0.908777\t0."..., 8192) = 8192
+read(3, "8\t0.365658\t0.929518\tsetrgbcolor\n"..., 8192) = 8192
+write(4, "r\n\t231\t130\n\t241\t137\n\t234\t127\n\t4\t"..., 8192) = 8192
+read(3, "0.561485\t0.951276\tsetrgbcolor\n\t1"..., 8192) = 8192
+write(4, "\t158\t255\n\t154\t255\n\t162\t255\n\t4\t15"..., 8192) = 8192
+read(3, "\t151\n\t4\t152\t149\tpsColorPoly\n\t0.9"..., 8192) = 8192
+write(4, ".600566\t0.853436\t0.094826\tsetrgb"..., 8192) = 8192
+read(3, "2\t0.954814\t0.834316\tsetrgbcolor\n"..., 8192) = 8192
+write(4, "r\n\t157\t246\n\t148\t251\n\t155\t251\n\t4\t"..., 8192) = 8192
+read(3, "\t374\t203\n\t378\t210\n\t4\t372\t210\tpsC"..., 8192) = 8192
+write(4, "sColorPoly\n\t0.352588\t0.865444\t0."..., 8192) = 8192
+read(3, "225\n\t265\t215\n\t261\t228\n\t4\t259\t225"..., 8192) = 8192
+write(4, "14\tpsColorPoly\n\t0.508339\t0.94537"..., 8192) = 8192
+read(3, "sColorPoly\n\t0.904508\t0.904508\t0."..., 8192) = 8192
+write(4, "0.142370\tsetrgbcolor\n\t138\t148\n\t1"..., 8192) = 8192
+read(3, "67\t362\tpsColorPoly\n\t0.263827\t0.7"..., 8192) = 8192
+write(4, ".327572\t0.925286\tsetrgbcolor\n\t16"..., 8192) = 8192
+read(3, "\t255\tpsColorPoly\n\t0.914459\t0.709"..., 8192) = 8192
+write(4, "51569\t0.951569\tsetrgbcolor\n\t184\t"..., 8192) = 8192
+read(3, ".785407\t0.540159\tsetrgbcolor\n\t22"..., 8192) = 8192
+write(4, "\n\t229\t100\n\t224\t88\n\t232\t99\n\t4\t229"..., 8192) = 8192
+read(3, "71930\t0.171930\t0.907992\tsetrgbco"..., 8192) = 8192
+write(4, "color\n\t140\t200\n\t133\t199\n\t134\t201"..., 8192) = 8192
+read(3, "255\n\t362\t264\n\t4\t356\t262\tpsColorP"..., 8192) = 8192
+write(4, "rPoly\n\t0.133665\t0.903741\t0.39035"..., 8192) = 8192
+read(3, "175\n\t271\t162\n\t4\t273\t164\tpsColorP"..., 8192) = 8192
+write(4, "rPoly\n\t0.945572\t0.945572\t0.51014"..., 8192) = 8192
+read(3, "olor\n\t213\t80\n\t224\t88\n\t214\t78\n\t4\t"..., 8192) = 8192
+write(4, "91\n\t4\t224\t88\tpsColorPoly\n\t0.9033"..., 8192) = 8192
+read(3, "297730\tsetrgbcolor\n\t123\t168\n\t127"..., 8192) = 8192
+write(4, "23\t168\n\t126\t166\n\t4\t127\t171\tpsCol"..., 8192) = 8192
+read(3, "\t110\tpsColorPoly\n\t0.903129\t0.515"..., 8192) = 8192
+write(4, "13768\t0.124783\tsetrgbcolor\n\t141\t"..., 8192) = 8192
+read(3, "957851\t0.620662\t0.620662\tsetrgbc"..., 8192) = 8192
+write(4, "etrgbcolor\n\t192\t17\n\t173\t19\n\t191\t"..., 8192) = 8192
+read(3, "\n\t196\t76\n\t4\t199\t75\tpsColorPoly\n\t"..., 8192) = 8192
+write(4, "Poly\n\t0.940525\t0.607464\t0.464724"..., 8192) = 8192
+read(3, "olor\n\t206\t46\n\t215\t61\n\t203\t50\n\t4\t"..., 8192) = 8192
+write(4, "57\n\t4\t215\t61\tpsColorPoly\n\t0.9491"..., 8192) = 8192
+read(3, "rgbcolor\n\t125\t127\n\t129\t126\n\t120\t"..., 8192) = 8192
+write(4, "3\t125\n\t4\t129\t126\tpsColorPoly\n\t0."..., 8192) = 8192
+read(3, "1324\t0.837794\t0.093088\tsetrgbcol"..., 8192) = 8192
+write(4, "olor\n\t129\t175\n\t122\t177\n\t124\t174\n"..., 8192) = 8192
+read(3, "\n\t0.476217\t0.917297\t0.255677\tset"..., 8192) = 8192
+write(4, "27\tsetrgbcolor\n\t32\t232\n\t45\t262\n\t"..., 8192) = 8192
+read(3, "4\t91\n\t4\t260\t92\tpsColorPoly\n\t0.13"..., 8192) = 8192
+write(4, "\t0.905103\t0.449597\t0.145926\tsetr"..., 8192) = 8192
+read(3, "\t65\tpsColorPoly\n\t0.941146\t0.5644"..., 8192) = 8192
+write(4, "027\t0.563597\t0.469240\tsetrgbcolo"..., 8192) = 8192
+read(3, "137\n\t271\t151\n\t272\t137\n\t4\t277\t137"..., 8192) = 8192
+write(4, "51\tpsColorPoly\n\t0.917067\t0.65168"..., 8192) = 8192
+read(3, "6702\t0.516874\t0.250322\tsetrgbcol"..., 8192) = 8192
+write(4, "olor\n\t283\t107\n\t278\t123\n\t278\t107\n"..., 8192) = 8192
+read(3, "928019\t0.755265\t0.352171\tsetrgbc"..., 8192) = 8192
+write(4, "bcolor\n\t122\t177\n\t119\t176\n\t121\t17"..., 8192) = 8192
+read(3, "72\t57\n\t259\t42\n\t267\t58\n\t4\t272\t57\t"..., 8192) = 8192
+write(4, "5\t357\tpsColorPoly\n\t0.915892\t0.24"..., 8192) = 8192
+read(3, "\t0.331851\tsetrgbcolor\n\t116\t71\n\t1"..., 8192) = 8192
+write(4, "\n\t275\t186\n\t281\t173\n\t4\t281\t174\tps"..., 8192) = 8192
+read(3, "orPoly\n\t0.954105\t0.623661\t0.5869"..., 8192) = 8192
+write(4, "2711\tsetrgbcolor\n\t272\t170\n\t278\t1"..., 8192) = 8192
+read(3, "\t147\t217\tpsColorPoly\n\t0.938947\t0"..., 8192) = 8192
+write(4, "\t0.840876\t0.449185\tsetrgbcolor\n\t"..., 8192) = 8192
+read(3, ".210613\t0.133599\tsetrgbcolor\n\t34"..., 8192) = 8192
+write(4, "\t345\t105\n\t347\t86\n\t345\t100\n\t4\t345"..., 8192) = 8192
+read(3, "trgbcolor\n\t107\t161\n\t111\t161\n\t107"..., 8192) = 8192
+write(4, "11\t156\n\t4\t111\t161\tpsColorPoly\n\t0"..., 8192) = 8192
+read(3, "50\tsetrgbcolor\n\t117\t163\n\t116\t154"..., 8192) = 8192
+write(4, "\t116\n\t86\t123\n\t4\t87\t119\tpsColorPo"..., 8192) = 8192
+read(3, "105\n\t311\t120\n\t4\t306\t118\tpsColorP"..., 8192) = 8192
+write(4, "rPoly\n\t0.931152\t0.435442\t0.38036"..., 8192) = 8192
+read(3, "320\t104\n\t4\t319\t101\tpsColorPoly\n\t"..., 8192) = 8192
+write(4, "\n\t0.931474\t0.383268\t0.383268\tset"..., 8192) = 8192
+read(3, "\t130\n\t68\t115\n\t4\t72\t117\tpsColorPo"..., 8192) = 8192
+write(4, "olorPoly\n\t0.936210\t0.476922\t0.42"..., 8192) = 8192
+read(3, "52\t201\n\t241\t214\n\t252\t205\n\t4\t252\t"..., 8192) = 8192
+write(4, "4\t221\tpsColorPoly\n\t0.938758\t0.69"..., 8192) = 8192
+read(3, "\n\t4\t342\t223\tpsColorPoly\n\t0.77276"..., 8192) = 8192
+write(4, "993\t0.406463\t0.096777\tsetrgbcolo"..., 8192) = 8192
+read(3, "\t235\t214\n\t4\t232\t212\tpsColorPoly\n"..., 8192) = 8192
+write(4, "y\n\t0.924411\t0.561584\t0.319700\tse"..., 8192) = 8192
+read(3, "283\t190\tpsColorPoly\n\t0.905650\t0."..., 8192) = 8192
+write(4, "0.369740\t0.140554\tsetrgbcolor\n\t2"..., 8192) = 8192
+read(3, "Poly\n\t0.932194\t0.498234\t0.389744"..., 8192) = 8192
+write(4, "08\tsetrgbcolor\n\t331\t265\n\t314\t262"..., 8192) = 8192
+read(3, "\tpsColorPoly\n\t0.904704\t0.675995\t"..., 8192) = 8192
+write(4, "08962\t0.162062\tsetrgbcolor\n\t77\t2"..., 8192) = 8192
+read(3, "\t341\n\t151\t321\n\t4\t146\t324\tpsColor"..., 8192) = 8192
+write(4, "orPoly\n\t0.935156\t0.831407\t0.4164"..., 8192) = 8192
+read(3, "3\n\t4\t311\t179\tpsColorPoly\n\t0.9084"..., 8192) = 8192
+write(4, "7686\t0.325025\t0.259174\tsetrgbcol"..., 8192) = 8192
+read(3, "\tpsColorPoly\n\t0.943925\t0.540183\t"..., 8192) = 8192
+write(4, "95987\t0.337059\tsetrgbcolor\n\t82\t2"..., 8192) = 8192
+read(3, "62\tsetrgbcolor\n\t318\t264\n\t293\t268"..., 8192) = 8192
+write(4, "64\n\t293\t261\n\t4\t293\t268\tpsColorPo"..., 8192) = 8192
+read(3, "sColorPoly\n\t0.943030\t0.532843\t0."..., 8192) = 8192
+write(4, "0.124093\tsetrgbcolor\n\t122\t243\n\t1"..., 8192) = 8192
+read(3, ".542307\t0.497654\tsetrgbcolor\n\t13"..., 8192) = 8192
+write(4, "239\t287\n\t218\t272\n\t243\t285\n\t4\t239"..., 8192) = 8192
+read(3, "8\t0.100568\tsetrgbcolor\n\t243\t247\n"..., 8192) = 2668
+read(3, "", 8192) = 0
+close(3) = 0
+write(4, "0\n\t144\t258\n\t129\t237\n\t4\t124\t240\tp"..., 2738) = 2738
+close(4) = 0
+wait4(309925, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 309925
+--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=309925,
si_uid=1000, si_status=0, si_utime=10 /* 0.10 s */, si_stime=7 /* 0.07 s
*/} ---
+rt_sigaction(SIGHUP, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGINT, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGQUIT, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGILL, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGTRAP, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
+rt_sigaction(SIGABRT, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
+rt_sigaction(SIGBUS, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGFPE, NULL, {sa_handler=SIG_IGN, sa_mask=[FPE],
sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7d91f7c45cb0}, 8) = 0
+rt_sigaction(SIGKILL, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGUSR1, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGSEGV, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGUSR2, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGPIPE, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGALRM, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGTERM, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGSTKFLT, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGCHLD, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGCONT, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGSTOP, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGTSTP, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGTTIN, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGTTOU, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGURG, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGXCPU, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGXFSZ, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGVTALRM, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGPROF, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGWINCH, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGIO, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0},
8) = 0
+rt_sigaction(SIGPWR, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGSYS, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_2, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_3, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_4, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_5, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_6, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_7, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_8, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_9, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_10, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_11, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_12, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_13, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_14, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_15, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_16, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_17, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_18, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_19, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_20, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_21, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_22, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_23, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_24, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_25, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_26, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_27, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_28, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_29, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_30, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_31, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGRT_32, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
+rt_sigaction(SIGABRT, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
+rt_sigaction(SIGCHLD, NULL, {sa_handler=SIG_DFL, sa_mask=[],
sa_flags=0}, 8) = 0
+rt_sigaction(SIGIO, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0},
8) = 0
+getpid() = 309924
+getpid() = 309924
+getpid() = 309924
+getpid() = 309924
+exit_group(0) = ?
++++ exited with 0 +++

[Kurt Pagani]

Did you check the permissions of 'tmp' and of the device /dev/shm/ ??

On 29/05/2026 07:09, 'Ralf Hemmecke' via FriCAS - computer algebra

[Kurt Pagani]

Könnte auch damit zusammenhängen:

Ubuntu implements a range of security measures. "safer" mode (-dSAFER)
is enabled by default, the policy file of gs has additional
restrictions, it is confined by apparmor profiles, …

https://askubuntu.com/questions/1560219/ghostscript-unable-to-write-to-non-boot-volume-after-update-to-25-10


On 28/05/2026 22:10, 'Ralf Hemmecke' via FriCAS - computer algebra

[Kurt Pagani]

Könnte tatsächlich ein AppArmor Problem sein!

https://jan.krutisch.de/en/2026/01/26/using-ghostscript-on-ubuntu.html

On 28/05/2026 22:10, 'Ralf Hemmecke' via FriCAS - computer algebra
system wrote:

[Ralf Hemmecke]

On 5/29/26 11:47, Kurt Pagani wrote:
> Did you check the permissions of 'tmp'  and of the device /dev/shm/ ??

No. But here is the result.

$ ll -d /dev
drwxr-xr-x 22 root root 5160 May 28 10:08 /dev
$ ll -d /dev/shm
drwxrwxrwt 3 root root 400 May 28 16:32 /dev/shm
$ ll -d /dev/shm/hemmecke/
drwx------ 3 hemmecke hemmecke 60 May 28 13:18 /dev/shm/hemmecke/
$ ll -d /dev/shm/hemmecke/fricas/
drwx------ 4 hemmecke hemmecke 80 May 28 13:20 /dev/shm/hemmecke/fricas/
$ ll -d /dev/shm/hemmecke/fricas/b
drwx------ 8 hemmecke hemmecke 280 May 28 13:20 /dev/shm/hemmecke/fricas/b
$ ll -d /dev/shm/hemmecke/fricas/b/src/
drwx------ 14 hemmecke hemmecke 320 May 28 13:20
/dev/shm/hemmecke/fricas/b/src/
$ ll -d /dev/shm/hemmecke/fricas/b/src/doc/
drwx------ 148 hemmecke hemmecke 12620 May 28 21:53
/dev/shm/hemmecke/fricas/b/src/doc/
$ ll -d /dev/shm/hemmecke/fricas/b/src/doc/tmp/
drwx------ 80 hemmecke hemmecke 12200 May 28 13:21
/dev/shm/hemmecke/fricas/b/src/doc/tmp/
$ ll -d /dev/shm/hemmecke/fricas/b/src/doc/tmp/knot3.VIEW/
drwxrwxrwx 2 hemmecke hemmecke 120 May 29 06:52
/dev/shm/hemmecke/fricas/b/src/doc/tmp/knot3.VIEW/
$ ll -d /dev/shm/hemmecke/fricas/b/src/doc/tmp/knot3.VIEW/image.ps
-rw-r--r-- 1 hemmecke hemmecke 756332 May 28 13:21
/dev/shm/hemmecke/fricas/b/src/doc/tmp/knot3.VIEW/image.ps

Since "hemmecke" is compiling FriCAS, I do not see a problem with the
above permissions.

And I also wonder why apparmor should be the guilty process. The only
difference is the target file directory.

Ralf