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Questions tagged [execve]

207 questions
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execve on linux, execute from arguments

I need to create a program that allows the user to execute a command passed as argument using execve in linux. I'm not sure about the syntax of the execve command. I wrote the program but it doesn't work with multiple arguments and I can't figure…
Federico Zucchi
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After fork(), how to keep running execve() in for() loop?

Here is an example, ignorning the error checking: int main() { pid_t pid = fork(); if(0 == pid) { for(int i = 0; i < 5; ++i) { char* const args[] = { "/bin/ls", nullptr }; execve("/bin/ls", args,…
user7633138
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Can't pass 2nd environment variable with execve

I would like to display 2 environment variables that are passed as argument to another process using execve() function: Main.c: int main(){ char USERNAME[10]; strcpy(USERNAME, "USERNAME="); for (int i=1;i<10;i++){ …
SdFRO0QS78
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How can a program be executed using execve()?

I'm trying to perform a simple test using the exec() function by emulating a Linux shell. The test program should take in commands in the following form: cmd arg1 arg2 ... where cmd is the command and arg1, arg2, ... are the command line arguments.…
Brandon Busby
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execve x86 - Segmentation Fault

I keep getting segmentation faults on this could anybody help me on this one, I am kind of new to ASM global _start section .text _start: push dword 0x0068732F ; Push /sh push dword 0x6E69622F ; Push /bin mov eax, esp ; Store…
0xDeMoN
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ffmpeg produces bad output when called from execve in c++

im writing a c++ program that involves ffmpeg being called from a c++ program. a couple of days ago i got it working using std::system std::system("ffmpeg -threads auto -y -r 1.74659 -i /mnt/ev_ramdsk/1/%05d-capture.jpg -px_fmt yuv420p -preset…
Arheisel
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Bus Error in OS X x86_64 in Execve call

I am trying to mimic Security Tubes execve tutorial (http://hackoftheday.securitytube.net/2013/04/demystifying-execve-shellcode-stack.html) in 64bit Asm. I am not sure where the bus error is coming from. I stepped through through the app in GDB…
Jlegend
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unexpected EOF while looking for matching `'' while using execve()

I try to run multiple commands (or using simple output redirection) via execve(). When I put this (of course before I pass this string to function I split into spaces and put each each separate to char* []): "bash -c ' /usr/bin/cat /root/script.sh >…
maslokarol
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execve not taking environment parameters

I want to write a program which executes the Linux ls command. I really only want to type in ls and not /bin/ls, so I want to do this using execve (execvp is not an option). I tried: char *env[] = {…
今天春天
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Implement Pipe in C

I am implementing pipe in C. When I try the command 'cat aa | grep "something" ' in my program. The grep process just hanging there, seems waiting for input. I don't know why. Here is the core code. Just take ExecuteCommand as simply call execve…
Hengstar
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Unexpected output after the first iteration of this code

I honestly have no idea how the following even happens. Here is the code: while(1) { char** line = read_command(); char* command = line[0]; char** parameters = malloc(100); int i; for(i = 0; i < pNum; i++) // pNum is a global…
Armand Maree
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No exiting CPE in the official CPE dictionary

In some CVE, we can read some CPE like : cpe:/a:libcap:libcap:2.00 cpe:/a:gnome:libsoup:2.32.2 cpe:/a:libgtop:libgtop:2.14.5 But neither libcap nor libsoup nor libgtop are in the official CPE dictionary !! (XML file or online search :…
JohnCage
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execve to file I just wrote -- "Text file busy"

The intended behavior of the C program below is to copy its own executable file to a new randomly-named file, then execve that file, ad nauseum. This should create many, many copies of the executable. This is obviously a terrible idea, but it is…
Arandur
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more than one command for system call in linux

I am trying to execute a program (say target.c) that has the following void foo(char * arg) { char cmd[16]; char par[16]; char * p; strcpy(cmd, "ls --color -l "); strcpy(par, arg); printf("You can use \"%s %s\" to list the…
proteann
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Process controller running files in random order

I'm trying to execute and schedule my own list of processes read from a file. The files are running in a random order and I'm just curious as to why this is happening. I have simple print statements in the first, second, etc files that tell which is…
user3192682
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