is throwing errors #16

Author: arun11299

subprocess.hpp

@@ -310,29 +310,31 @@ namespace util
   // Requires Buffer to be of type class Buffer
   static inline int read_all(int fd, Buffer& buf)
   {
-    size_t orig_size = buf.size();
-    int increment = orig_size;
     auto buffer = buf.data();
     int total_bytes_read = 0;
+    int fill_sz = buf.size();
 
     while (1) {
-      int rd_bytes = read_atmost_n(fd, buffer, buf.size());
-      if (rd_bytes == increment) {
-        // Resize the buffer to accomodate more
-        orig_size = orig_size * 1.5;
-        increment = orig_size - buf.size();
-        buf.resize(orig_size);
+      const int rd_bytes = read_atmost_n(fd, buffer, fill_sz);
+
+      if (rd_bytes == -1) { // Read finished
+        if (total_bytes_read == 0) return -1;
+        break;
+
+      } else if (rd_bytes == fill_sz) { // Buffer full
+        const auto orig_sz = buf.size();
+        const auto new_sz = orig_sz * 2;
+        buf.resize(new_sz);
+        fill_sz = new_sz - orig_sz;
+
         //update the buffer pointer
         buffer = buf.data();
         buffer += rd_bytes;
         total_bytes_read += rd_bytes;
 
-      } else if (rd_bytes != -1) {
+      } else { // Partial data ? Continue reading
         total_bytes_read += rd_bytes;
-        break;
-
-      } else {
-        if (total_bytes_read == 0) return -1;
+        fill_sz -= rd_bytes;
         break;
       }
     }

test/cat_fredirect.txt

@@ -1 +1 @@
-through stdin to stdout
+through stdin to stdoutthrough stdin to stdoutthrough stdin to stdoutthrough stdin to stdout

test/test_cat

@@ -1,3 +1,5 @@
 writing error to stderr
 This is going to be a big chunk of error text consisting of garbage words that would never make sense....so here it goes....shouldnt I be doing my work instead ???? ...anyways....lets get to it......dsmvnskmnv;lsdnv;la,mdfv;, lasdnvs, dv;lknvlka;dv laldmflasmdlgvma lm glfdmg lasfgl;mflgms,vdmlmsdfl'bmsldfkmblsdfm blksdfmblk fsdl,b sdlfnbksan kjskanfkjbhv snf p'owMF;OANDOPGIHWEPO;JFOIEHGUYHT JNTG JWEBGIJN FV SDKMNV KJNKJ nokfnrgok weoirgoinfs ijbzx,mv;lksdcnvpisfuhgu wnergorgok nvglk;bn;mkf bkngfkbm fdlb;gfnb ;kdfgn b,mfdl's,g'l;am nsgaosnblm;adrg;lnklf nglkfmnvklb njfknblsmdnkfngsjdfbgsjdbghjb iblnrfgiof n gjsndv  vewflkjvekrjgnlkmv mjbeijdfnwek vkijnnfg'koqrnbon nq'eopkfm[qef[lfkdnb ;smknv jk fnkmv ntipjvn kbvn iprtu ghj9p84w5toihnvlkmnlmk nvoijh90rjqo3mrok34 nfkm nnkof nerokmnrgo[j0igjwlkngvmfgnvml   oirejgoiewjrfgoiwejrgko[ mwbkm grioejqg[ktrwngk;wnmb;mn;wfkb oirjgiontrgmnwe;fklvnfiobjneiorgn;mbn  ijorgenowg;lwbenkownfboiwnrtgiovwnrtblntbontriobnwkrn;  onboirw noignjwmKFCV;MKNSDVIUNRIPTN5I KNVK;JN ION EOQWNQ;LDKN V;FMNVKFN[B WPORJGOP[ WLERGNA;SLDKNV;MF NPOINRG;JWN;KNRPEFGI9485JBEKMSD NK;NKL; NFOSAJFKOSNKMN;CV, KAD;FKM;SOGMVLKSMD;,R F;OKA;FL APSLFM ADL;SKOK OKNEW KDJFOKSDJ Alpwpowejgoplwefkmglk p[reg porej gokwem vkl wmo ao[jk [klqmpkoem gpofem lksjn zflkvbn;kf hgioniog krngkmadnv;mfsdn bkleqrjl;wgnpoekw jqbfk mv;lm,redop[ jor[f klqr3ko[j vioadm ;lksdcmn ovj['or'aewnjkopj 'wk;w;k fwrite_err.sh sadkjlbnlfkblfkn blndsf kjwern gfpjknerkgn fknv k;qkgn kfv mscvlkmsn ldkfv nkamdkmv efkgv n;kemf mvwfbkm nfgkmbk bklwnmgklwmtrklgnfkl;b nwkjn glkwmfn lkmnrknwrkpg nkf nlmk nwljkengjklnwflgbnflkjbngkljwfgbn jnk wngpkwrtgnpo n
 This is going to be a big chunk of error text consisting of garbage words that would never make sense....so here it goes....shouldnt I be doing my work instead ???? ...anyways....lets get to it......dsmvnskmnv;lsdnv;la,mdfv;, lasdnvs, dv;lknvlka;dv laldmflasmdlgvma lm glfdmg lasfgl;mflgms,vdmlmsdfl'bmsldfkmblsdfm blksdfmblk fsdl,b sdlfnbksan kjskanfkjbhv snf p'owMF;OANDOPGIHWEPO;JFOIEHGUYHT JNTG JWEBGIJN FV SDKMNV KJNKJ nokfnrgok weoirgoinfs ijbzx,mv;lksdcnvpisfuhgu wnergorgok nvglk;bn;mkf bkngfkbm fdlb;gfnb ;kdfgn b,mfdl's,g'l;am nsgaosnblm;adrg;lnklf nglkfmnvklb njfknblsmdnkfngsjdfbgsjdbghjb iblnrfgiof n gjsndv  vewflkjvekrjgnlkmv mjbeijdfnwek vkijnnfg'koqrnbon nq'eopkfm[qef[lfkdnb ;smknv jk fnkmv ntipjvn kbvn iprtu ghj9p84w5toihnvlkmnlmk nvoijh90rjqo3mrok34 nfkm nnkof nerokmnrgo[j0igjwlkngvmfgnvml   oirejgoiewjrfgoiwejrgko[ mwbkm grioejqg[ktrwngk;wnmb;mn;wfkb oirjgiontrgmnwe;fklvnfiobjneiorgn;mbn  ijorgenowg;lwbenkownfboiwnrtgiovwnrtblntbontriobnwkrn;  onboirw noignjwmKFCV;MKNSDVIUNRIPTN5I KNVK;JN ION EOQWNQ;LDKN V;FMNVKFN[B WPORJGOP[ WLERGNA;SLDKNV;MF NPOINRG;JWN;KNRPEFGI9485JBEKMSD NK;NKL; NFOSAJFKOSNKMN;CV, KAD;FKM;SOGMVLKSMD;,R F;OKA;FL APSLFM ADL;SKOK OKNEW KDJFOKSDJ Alpwpowejgoplwefkmglk p[reg porej gokwem vkl wmo ao[jk [klqmpkoem gpofem lksjn zflkvbn;kf hgioniog krngkmadnv;mfsdn bkleqrjl;wgnpoekw jqbfk mv;lm,redop[ jor[f klqr3ko[j vioadm ;lksdcmn ovj['or'aewnjkopj 'wk;w;k fwrite_err.sh sadkjlbnlfkblfkn blndsf kjwern gfpjknerkgn fknv k;qkgn kfv mscvlkmsn ldkfv nkamdkmv efkgv n;kemf mvwfbkm nfgkmbk bklwnmgklwmtrklgnfkl;b nwkjn glkwmfn lkmnrknwrkpg nkf nlmk nwljkengjklnwflgbnflkjbngkljwfgbn jnk wngpkwrtgnpo n
+This is going to be a big chunk of error text consisting of garbage words that would never make sense....so here it goes....shouldnt I be doing my work instead ???? ...anyways....lets get to it......dsmvnskmnv;lsdnv;la,mdfv;, lasdnvs, dv;lknvlka;dv laldmflasmdlgvma lm glfdmg lasfgl;mflgms,vdmlmsdfl'bmsldfkmblsdfm blksdfmblk fsdl,b sdlfnbksan kjskanfkjbhv snf p'owMF;OANDOPGIHWEPO;JFOIEHGUYHT JNTG JWEBGIJN FV SDKMNV KJNKJ nokfnrgok weoirgoinfs ijbzx,mv;lksdcnvpisfuhgu wnergorgok nvglk;bn;mkf bkngfkbm fdlb;gfnb ;kdfgn b,mfdl's,g'l;am nsgaosnblm;adrg;lnklf nglkfmnvklb njfknblsmdnkfngsjdfbgsjdbghjb iblnrfgiof n gjsndv  vewflkjvekrjgnlkmv mjbeijdfnwek vkijnnfg'koqrnbon nq'eopkfm[qef[lfkdnb ;smknv jk fnkmv ntipjvn kbvn iprtu ghj9p84w5toihnvlkmnlmk nvoijh90rjqo3mrok34 nfkm nnkof nerokmnrgo[j0igjwlkngvmfgnvml   oirejgoiewjrfgoiwejrgko[ mwbkm grioejqg[ktrwngk;wnmb;mn;wfkb oirjgiontrgmnwe;fklvnfiobjneiorgn;mbn  ijorgenowg;lwbenkownfboiwnrtgiovwnrtblntbontriobnwkrn;  onboirw noignjwmKFCV;MKNSDVIUNRIPTN5I KNVK;JN ION EOQWNQ;LDKN V;FMNVKFN[B WPORJGOP[ WLERGNA;SLDKNV;MF NPOINRG;JWN;KNRPEFGI9485JBEKMSD NK;NKL; NFOSAJFKOSNKMN;CV, KAD;FKM;SOGMVLKSMD;,R F;OKA;FL APSLFM ADL;SKOK OKNEW KDJFOKSDJ Alpwpowejgoplwefkmglk p[reg porej gokwem vkl wmo ao[jk [klqmpkoem gpofem lksjn zflkvbn;kf hgioniog krngkmadnv;mfsdn bkleqrjl;wgnpoekw jqbfk mv;lm,redop[ jor[f klqr3ko[j vioadm ;lksdcmn ovj['or'aewnjkopj 'wk;w;k fwrite_err.sh sadkjlbnlfkblfkn blndsf kjwern gfpjknerkgn fknv k;qkgn kfv mscvlkmsn ldkfv nkamdkmv efkgv n;kemf mvwfbkm nfgkmbk bklwnmgklwmtrklgnfkl;b nwkjn glkwmfn lkmnrknwrkpg nkf nlmk nwljkengjklnwflgbnflkjbngkljwfgbn jnk wngpkwrtgnpo n
+This is going to be a big chunk of error text consisting of garbage words that would never make sense....so here it goes....shouldnt I be doing my work instead ???? ...anyways....lets get to it......dsmvnskmnv;lsdnv;la,mdfv;, lasdnvs, dv;lknvlka;dv laldmflasmdlgvma lm glfdmg lasfgl;mflgms,vdmlmsdfl'bmsldfkmblsdfm blksdfmblk fsdl,b sdlfnbksan kjskanfkjbhv snf p'owMF;OANDOPGIHWEPO;JFOIEHGUYHT JNTG JWEBGIJN FV SDKMNV KJNKJ nokfnrgok weoirgoinfs ijbzx,mv;lksdcnvpisfuhgu wnergorgok nvglk;bn;mkf bkngfkbm fdlb;gfnb ;kdfgn b,mfdl's,g'l;am nsgaosnblm;adrg;lnklf nglkfmnvklb njfknblsmdnkfngsjdfbgsjdbghjb iblnrfgiof n gjsndv  vewflkjvekrjgnlkmv mjbeijdfnwek vkijnnfg'koqrnbon nq'eopkfm[qef[lfkdnb ;smknv jk fnkmv ntipjvn kbvn iprtu ghj9p84w5toihnvlkmnlmk nvoijh90rjqo3mrok34 nfkm nnkof nerokmnrgo[j0igjwlkngvmfgnvml   oirejgoiewjrfgoiwejrgko[ mwbkm grioejqg[ktrwngk;wnmb;mn;wfkb oirjgiontrgmnwe;fklvnfiobjneiorgn;mbn  ijorgenowg;lwbenkownfboiwnrtgiovwnrtblntbontriobnwkrn;  onboirw noignjwmKFCV;MKNSDVIUNRIPTN5I KNVK;JN ION EOQWNQ;LDKN V;FMNVKFN[B WPORJGOP[ WLERGNA;SLDKNV;MF NPOINRG;JWN;KNRPEFGI9485JBEKMSD NK;NKL; NFOSAJFKOSNKMN;CV, KAD;FKM;SOGMVLKSMD;,R F;OKA;FL APSLFM ADL;SKOK OKNEW KDJFOKSDJ Alpwpowejgoplwefkmglk p[reg porej gokwem vkl wmo ao[jk [klqmpkoem gpofem lksjn zflkvbn;kf hgioniog krngkmadnv;mfsdn bkleqrjl;wgnpoekw jqbfk mv;lm,redop[ jor[f klqr3ko[j vioadm ;lksdcmn ovj['or'aewnjkopj 'wk;w;k fwrite_err.sh sadkjlbnlfkblfkn blndsf kjwern gfpjknerkgn fknv k;qkgn kfv mscvlkmsn ldkfv nkamdkmv efkgv n;kemf mvwfbkm nfgkmbk bklwnmgklwmtrklgnfkl;b nwkjn glkwmfn lkmnrknwrkpg nkf nlmk nwljkengjklnwflgbnflkjbngkljwfgbn jnk wngpkwrtgnpo n