hiho@ll
what i want:
execute another programm within my C app using popen(); and check if an error occured
how i try it:
Code:
FILE *fp = popen("someprog someparams 1>/dev/null 2>&1","r");
if(fp!=NULL){
int len = fread(buffer,sizeof(char),1024,fp);
if(len>0){
printf("WTF: AN ERROR!!!");
error = true;
}
pclose(fp);
}
what i wanted to do:
redirect stdout to dev null and stderr to stdout, so i can read using popen and i only get stderr
just a simple schematic example:
"tar blablabla 1>/dev/null 2>&1" --> i get nothing
"tar blablabla" --> i get the error to stdout i wanted to read from stdin
another possibility would be redirect stderr to a file and check if the file is empty
Q1: any suggestion, how i can do the redirection, so it works? OR how can i read stderr instead of stdout using popen?
Q2: any other option other than creating a file?
thx@ll!
