question about popen in C Post: 302504993

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question about popen();

Hi The following is my program to test popen() routine. The purpose is to print some contents of the corrent directory. But in fact, the output is only one character 'a', which I believe is the first char of the file "a.out". So, can anybody tell me what is wrong about this program?...

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query in popen

hai friends I have written a tcp chat server in c.. I have designed a cgi program in c to control it... When i try to start the server from the cgi program, it is not starting. Why is that ? I have even tried giving the root ownership for all the programs.. Still its not. I have used the...

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Hi there, I'm facing a problem running the tar command with the popen function. FILE* fp = popen("tar czf - textfile","r") // output this program should give the output to the stdout. I don't know if it is possible and which function like fprint() etc. should I use. I suppose that I...

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hi, how to work with a background process without a controlling terminal to make use of popen or system call ? when ever i use popen or system function call in foreground process, there is no problem with respect to that .. but when the same program is run as a background process without a...

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Hello I'm writing a web server in python(obelisk-http.sourceforge.net) and I'm having a greeat problem with POST method it like that When someone make a POST request to the server it must open the executable(perl/python/.exe/elf) and send to the STANDART in (stdin) the request and get the...

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Hi! I'm trying to write a c program. The child process must transmit to the parent a file name and the parent must count the lines from the file and return te result to the child. Here is what i've done. It doesn't stop running, I guess. I'm sorry if it's an ugly code, i'm new at this stuff,...

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popen and pclose solved

Hi I am trying to use popen function with wrtie option to give inputs to ftp command. #include "stdio.h" int main(int argv ,char *argc) { int size=0; char *buf; FILE *fp; fp = popen("ftp","w"); while(getline(&buf,&size,stdin) != -1) write(fp,buf);...

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segmentation fault while using popen

hi, i am trying to use popen to run a grep process and check if the pattern exists in the file that i am searching in. i am getting segmentation fault when i try to execute the following code char *cd; char flag; char hdr_flpsp; char hdr_flpsp2; FILE *fp; printf ("program starts");...

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question about system and popen in C

in man system it talks about SIGCHLD will be blocked, and SIGINT and SIGQUIT will be ignored. Does this signal stuff also happen in popen command? (even though man popen says nothing about signals) also if I am not using wait(&status) and I am using waitpid(pid, NULL, 0) how would...

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Popen problem

Hello all, I am reading a huge zip file in POPEN process and then writting that to a normal file which of 2GB. Now the process is failing when I looked for the cause someother process comming in after I read my file and it is deleting the zip. But in theory the popen command should read the...

LEARN ABOUT SUNOS

sysmsg

sysmsg(7D)							      Devices								sysmsg(7D)

NAME

       sysmsg - system message routing to console devices

SYNOPSIS

       /dev/sysmsg

DESCRIPTION

       The  file  /dev/sysmsg routes output to a variable set of console devices.  Writes to /dev/sysmsg are always directed to the system console
       /dev/console, and are in addition directed to a set of auxiliary console devices managed by consadm(1M).

       Only root has permission to write to this device.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsr			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Stable			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       consadm(1M), syslogd(1M) , attributes(5), console(7D)

SunOS 5.10							    13 Oct 1998 							sysmsg(7D)

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