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“hello world” c cgi script crashes on server”
Difference between the Apache HTTP Server and Apache Tomcat?What's the difference between proxy server and reverse proxy server?How do I prompt for Yes/No/Cancel input in a Linux shell script?Why doesn't “cd” work in a shell script?Pipe to/from the clipboard in Bash scriptWhat is the difference between application server and web server?What is Common Gateway Interface (CGI)?Using node.js as a simple web serverRemote C-based CGI Script Crashing In __libc_start_main()Cannot install atari-py on RedHat Enterprise server with c compiler broken error
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I'm trying to execute a simple c cgi-script on a hosted webserver. I compiled this code:
#include <stdio.h>
int main()
printf("Content-type: text/plainnn");
printf("<html>n");
printf("<head><title>Testing CGI-Scripts</title></head>n");
printf("<body>n");
printf("<h1>Hello World</h1>n");
printf("</body>n");
printf("</html>n");
return 0;
with gcc -o index.cgi index.c, uploaded the binary to the cgi-bin directory and changed the permission to 755. Yet when executing the script (url/cgi-bin/index.cgi) it causes a core-dump and I'm getting "500 Internal Server Error". Analyzing the core-dump with gdb got me "Cannot access memory at address 0x3000000000008" and the same line with "0x3000000000000".
I tried:
- compiling on Ubuntu 11.10 (because auf kernel 3.0)
- compiling with -static
(Analysis with gdb from the static binary:
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x0000000000401e82 in __libc_start_main ()
)
My System: Arch Linux, kernel 4.20.12 x86_64
Server: CloudLinux 7, kernel 3.10.0-962.3.2.lve1.5.24.8.el7 x86_64
I do not have shell access, unfortunately.
Edit: Solution:
Building a static binary on a virtual machine with CentOS (on which the Servers distro is based on) installed worked!
c linux webserver cgi hosting
asked Mar 27 at 23:35
rn42v1rrn42v1r
254 bronze badges
add a comment |
I'm trying to execute a simple c cgi-script on a hosted webserver. I compiled this code:
#include <stdio.h>
int main()
printf("Content-type: text/plainnn");
printf("<html>n");
printf("<head><title>Testing CGI-Scripts</title></head>n");
printf("<body>n");
printf("<h1>Hello World</h1>n");
printf("</body>n");
printf("</html>n");
return 0;
with gcc -o index.cgi index.c, uploaded the binary to the cgi-bin directory and changed the permission to 755. Yet when executing the script (url/cgi-bin/index.cgi) it causes a core-dump and I'm getting "500 Internal Server Error". Analyzing the core-dump with gdb got me "Cannot access memory at address 0x3000000000008" and the same line with "0x3000000000000".
I tried:
- compiling on Ubuntu 11.10 (because auf kernel 3.0)
- compiling with -static
(Analysis with gdb from the static binary:
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x0000000000401e82 in __libc_start_main ()
)
My System: Arch Linux, kernel 4.20.12 x86_64
Server: CloudLinux 7, kernel 3.10.0-962.3.2.lve1.5.24.8.el7 x86_64
I do not have shell access, unfortunately.
Edit: Solution:
Building a static binary on a virtual machine with CentOS (on which the Servers distro is based on) installed worked!
c linux webserver cgi hosting
asked Mar 27 at 23:35
rn42v1rrn42v1r
254 bronze badges
Linking libc static can fail easily because it still tries to link other, dynamic components "by foot". If you want to build a static binary I would recommend to use an alternative libc implementation, as for exampleuclibc. Usually, a script language, which is available at the webserver environment, is used for CGI however. A shell script for example, or perl, python, whatever.
– Ctx
Mar 27 at 23:42
@Ctx Thank you, I'm gonna give uclibc a shot.
– rn42v1r
Mar 27 at 23:49
add a comment |
I'm trying to execute a simple c cgi-script on a hosted webserver. I compiled this code:
#include <stdio.h>
int main()
printf("Content-type: text/plainnn");
printf("<html>n");
printf("<head><title>Testing CGI-Scripts</title></head>n");
printf("<body>n");
printf("<h1>Hello World</h1>n");
printf("</body>n");
printf("</html>n");
return 0;
with gcc -o index.cgi index.c, uploaded the binary to the cgi-bin directory and changed the permission to 755. Yet when executing the script (url/cgi-bin/index.cgi) it causes a core-dump and I'm getting "500 Internal Server Error". Analyzing the core-dump with gdb got me "Cannot access memory at address 0x3000000000008" and the same line with "0x3000000000000".
I tried:
- compiling on Ubuntu 11.10 (because auf kernel 3.0)
- compiling with -static
(Analysis with gdb from the static binary:
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x0000000000401e82 in __libc_start_main ()
)
My System: Arch Linux, kernel 4.20.12 x86_64
Server: CloudLinux 7, kernel 3.10.0-962.3.2.lve1.5.24.8.el7 x86_64
I do not have shell access, unfortunately.
Edit: Solution:
Building a static binary on a virtual machine with CentOS (on which the Servers distro is based on) installed worked!
c linux webserver cgi hosting
asked Mar 27 at 23:35
rn42v1rrn42v1r
254 bronze badges
I'm trying to execute a simple c cgi-script on a hosted webserver. I compiled this code:
#include <stdio.h>
int main()
printf("Content-type: text/plainnn");
printf("<html>n");
printf("<head><title>Testing CGI-Scripts</title></head>n");
printf("<body>n");
printf("<h1>Hello World</h1>n");
printf("</body>n");
printf("</html>n");
return 0;
with gcc -o index.cgi index.c, uploaded the binary to the cgi-bin directory and changed the permission to 755. Yet when executing the script (url/cgi-bin/index.cgi) it causes a core-dump and I'm getting "500 Internal Server Error". Analyzing the core-dump with gdb got me "Cannot access memory at address 0x3000000000008" and the same line with "0x3000000000000".
I tried:
- compiling on Ubuntu 11.10 (because auf kernel 3.0)
- compiling with -static
(Analysis with gdb from the static binary:
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x0000000000401e82 in __libc_start_main ()
)
My System: Arch Linux, kernel 4.20.12 x86_64
Server: CloudLinux 7, kernel 3.10.0-962.3.2.lve1.5.24.8.el7 x86_64
I do not have shell access, unfortunately.
Edit: Solution:
Building a static binary on a virtual machine with CentOS (on which the Servers distro is based on) installed worked!
c linux webserver cgi hosting
c linux webserver cgi hosting
asked Mar 27 at 23:35
rn42v1rrn42v1r
254 bronze badges
asked Mar 27 at 23:35
rn42v1rrn42v1r
254 bronze badges
edited Mar 28 at 13:07
rn42v1r
asked Mar 27 at 23:35
rn42v1rrn42v1r
254 bronze badges
asked Mar 27 at 23:35
rn42v1rrn42v1r
254 bronze badges
asked Mar 27 at 23:35
rn42v1rrn42v1r
254 bronze badges
254 bronze badges
Linking libc static can fail easily because it still tries to link other, dynamic components "by foot". If you want to build a static binary I would recommend to use an alternative libc implementation, as for exampleuclibc. Usually, a script language, which is available at the webserver environment, is used for CGI however. A shell script for example, or perl, python, whatever.
– Ctx
Mar 27 at 23:42
@Ctx Thank you, I'm gonna give uclibc a shot.
– rn42v1r
Mar 27 at 23:49
add a comment |
Linking libc static can fail easily because it still tries to link other, dynamic components "by foot". If you want to build a static binary I would recommend to use an alternative libc implementation, as for exampleuclibc. Usually, a script language, which is available at the webserver environment, is used for CGI however. A shell script for example, or perl, python, whatever.
– Ctx
Mar 27 at 23:42
@Ctx Thank you, I'm gonna give uclibc a shot.
– rn42v1r
Mar 27 at 23:49
Linking libc static can fail easily because it still tries to link other, dynamic components "by foot". If you want to build a static binary I would recommend to use an alternative libc implementation, as for example
uclibc. Usually, a script language, which is available at the webserver environment, is used for CGI however. A shell script for example, or perl, python, whatever.– Ctx
Mar 27 at 23:42
Linking libc static can fail easily because it still tries to link other, dynamic components "by foot". If you want to build a static binary I would recommend to use an alternative libc implementation, as for example
uclibc. Usually, a script language, which is available at the webserver environment, is used for CGI however. A shell script for example, or perl, python, whatever.– Ctx
Mar 27 at 23:42
@Ctx Thank you, I'm gonna give uclibc a shot.
– rn42v1r
Mar 27 at 23:49
@Ctx Thank you, I'm gonna give uclibc a shot.
– rn42v1r
Mar 27 at 23:49
add a comment |
1 Answer
1
active
oldest
votes
The libraries and linker behavior may vary widely. The two distributions in question aren't even running on the same major kernel version. It sounds like you're compiling against a significantly newer version of glibc than the one that exists on your server.
I recommend you set up cross-compilation or run CloudLinux 7 in a virtual machine and compile in the VM.
answered Mar 27 at 23:51
torstenvltorstenvl
7576 silver badges14 bronze badges
1
Thanks alot, setting up a virtual machine with CentOS 7 (which CloudLinux 7 is based on) and then building a static binary worked!
– rn42v1r
Mar 28 at 13:03
add a comment |
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1 Answer
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active
oldest
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active
oldest
votes
The libraries and linker behavior may vary widely. The two distributions in question aren't even running on the same major kernel version. It sounds like you're compiling against a significantly newer version of glibc than the one that exists on your server.
I recommend you set up cross-compilation or run CloudLinux 7 in a virtual machine and compile in the VM.
answered Mar 27 at 23:51
torstenvltorstenvl
7576 silver badges14 bronze badges
1
Thanks alot, setting up a virtual machine with CentOS 7 (which CloudLinux 7 is based on) and then building a static binary worked!
– rn42v1r
Mar 28 at 13:03
add a comment |
The libraries and linker behavior may vary widely. The two distributions in question aren't even running on the same major kernel version. It sounds like you're compiling against a significantly newer version of glibc than the one that exists on your server.
I recommend you set up cross-compilation or run CloudLinux 7 in a virtual machine and compile in the VM.
answered Mar 27 at 23:51
torstenvltorstenvl
7576 silver badges14 bronze badges
1
Thanks alot, setting up a virtual machine with CentOS 7 (which CloudLinux 7 is based on) and then building a static binary worked!
– rn42v1r
Mar 28 at 13:03
add a comment |
The libraries and linker behavior may vary widely. The two distributions in question aren't even running on the same major kernel version. It sounds like you're compiling against a significantly newer version of glibc than the one that exists on your server.
I recommend you set up cross-compilation or run CloudLinux 7 in a virtual machine and compile in the VM.
answered Mar 27 at 23:51
torstenvltorstenvl
7576 silver badges14 bronze badges
The libraries and linker behavior may vary widely. The two distributions in question aren't even running on the same major kernel version. It sounds like you're compiling against a significantly newer version of glibc than the one that exists on your server.
I recommend you set up cross-compilation or run CloudLinux 7 in a virtual machine and compile in the VM.
answered Mar 27 at 23:51
torstenvltorstenvl
7576 silver badges14 bronze badges
answered Mar 27 at 23:51
torstenvltorstenvl
7576 silver badges14 bronze badges
answered Mar 27 at 23:51
torstenvltorstenvl
7576 silver badges14 bronze badges
answered Mar 27 at 23:51
torstenvltorstenvl
7576 silver badges14 bronze badges
7576 silver badges14 bronze badges
1
Thanks alot, setting up a virtual machine with CentOS 7 (which CloudLinux 7 is based on) and then building a static binary worked!
– rn42v1r
Mar 28 at 13:03
add a comment |
1
Thanks alot, setting up a virtual machine with CentOS 7 (which CloudLinux 7 is based on) and then building a static binary worked!
– rn42v1r
Mar 28 at 13:03
1
1
Thanks alot, setting up a virtual machine with CentOS 7 (which CloudLinux 7 is based on) and then building a static binary worked!
– rn42v1r
Mar 28 at 13:03
Thanks alot, setting up a virtual machine with CentOS 7 (which CloudLinux 7 is based on) and then building a static binary worked!
– rn42v1r
Mar 28 at 13:03
add a comment |
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Linking libc static can fail easily because it still tries to link other, dynamic components "by foot". If you want to build a static binary I would recommend to use an alternative libc implementation, as for example
uclibc. Usually, a script language, which is available at the webserver environment, is used for CGI however. A shell script for example, or perl, python, whatever.– Ctx
Mar 27 at 23:42
@Ctx Thank you, I'm gonna give uclibc a shot.
– rn42v1r
Mar 27 at 23:49