c - Calling execve bash on bash scripts can't find arguments -

c - Calling execve bash on bash scripts can't find arguments -

i have 2 (ubuntu linux) bash scripts take input arguments. need run simultaneously. tried execve arguments e.g.

char *argv[10] = { "/mnt/hgfs/f/working/script.sh", "file1", "file2", null };

execve(argv[0], argv, null)

but bash script can't seem find arguments @ e.g. $0, $1, $2.

printf "gcc -c ./%s.c -o ./%s.o\n" $1 $1; gcc -c ./$1.c -o ./$1.o -g exit 0;

output gcc -c ./main.c -o ./main.o , lot of errors /usr/include/libio.h:53:21: error: stdarg.h: no such file or directory

what's missing?

does script start hashbang line? think that's must, like:

#!/bin/bash

for example, see next c program:

#include <stdio.h> #include <unistd.h> char *argv[10] = { "./qq.sh", "file1", null }; int main (void) { int rc = execve (argv[0], argv, null); printf ("rc = %d\n", rc); homecoming 0; }

when compiled , run next qq.sh file, outputs rc = -1:

echo $1

when alter file to:

#!/bin/bash echo $1

it outputs:

file1

as expected.

the other thing need watch out using these vmware shared folders, evidenced /mnt/hgfs. if file created windows-type editor, may have "dos" line endings of carriage-return/line-feed - may causing problems execution of scripts.

you can check running:

od -xcb /mnt/hgfs/f/working/script.sh

and seeing if \r characters appear.

for example, if utilize shell script hashbang line in (but appen carriage homecoming line), also rc = -1 output, meaning couldn't find shell.

and, now, based on edits, script has no problem interpreting arguments @ all. fact outputs:

gcc -c ./main.c -o ./main.o

is proof positive of since it's seeing $1 main.

the problem have compiler is working cannot find strdarg.h included libio.h file - has nil whether bash can see arguments.

my suggestion seek , compile manually command , see if same errors. if so, it's problem you're trying compile rather bash or exec issue.

if compile okay, may because of destruction of environment variables in execve call.

c linux bash