Package: wnpp
Severity: wishlist
* Package name : libexecs
Version : 1.0
Upstream Author : Renzo Davoli <re...@cs.unibo.it>
* URL : https://github.com/rd235/s2argv-execs.git
* License : GPL2+
Description : C library for manipulating command strings and executing
commands
libexecs is available in two versions, libexecs and libeexecs, where
libexecs is the main library and libeexecs is best suited to embedded
devices.
It provides the following (classes of) functions:
- s2argv converts a command string into an argv array for execv, execvp,
execvpe.
- execs, execsp, execspe are similar to execv(3), execve(2), execvp(3) and
execvpe(3), respectively, they take the command line arguments for the file
to execute
(and also the command name for execsp(3) and execspe(3)) by parsing a
command string args.
- coprocv, coprocvp, coprocvpe, coprocs, coprocsp execute a command in
coprocessing mode, versions differ in the way to specify the executable
file to run and its parameters.
- esystem, system_eexecsp are an almost drop in replacement for system(3)
provided by the libc. esystem parses the command string and runs the
command directly, without using a shell. The executable file is sought
using the PATH environment variable.
- popen_nosh, popen_execsp and pclose_nosh pipe stream to or from a process
without using a shell. They are an almost drop in replacement for popen(3)
and pclose(3) provided by the libc.
- system_nosh executes a command with its arguments from a string without
using a shell. As the popen*/pclose* family of functions for popen(3) and
pclose(3), system_nosh is an almost drop in replacement for system(3)
provided by the libc.
The following programs show what is possible to do with the given functions
(examples with execs and s2argv, respectively):
#include <stdio.h>
#include <unistd.h>
#include <execs.h>
#define BUFLEN 1024
int main(int argc, char *argv)
{
char buf[BUFLEN];
printf("type in a command and its arguments, e.g. 'ls -l'\\n");
if (fgets(buf, BUFLEN, stdin) != NULL) {
execsp(buf);
printf("exec error\\n");
}
}
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <execs.h>
#define BUFLEN 1024
int main(int argc, char *argv)
{
char buf[BUFLEN];
printf("type in a command and its arguments, e.g. 'ls -l'\\n");
if (fgets(buf, BUFLEN, stdin) != NULL) {
char **argv=s2argv(buf);
execvp(argv[0], argv);
s2argv_free(argv);
printf("exec error\\n");
}
}
