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/* spawntest.c - test the spawnve() function
* Copyright (C) 2006,2007 Hans Ulrich Niedermann <gp@n-dimensional.de>
* C99ism fix Copyright (C) 2007 Dan Fandrich <dan@coneharvesters.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "spawnve.h"
#define ASSERT(cond) \
do { \
if (!(cond)) { \
fprintf(stderr, "%s:%d: Assertion failed: %s\n", \
__FILE__, __LINE__, #cond); \
exit(13); \
} \
} while(0)
static char *
alloc_envar(const char *varname, const char *value)
{
const size_t varname_size = strlen(varname);
const size_t value_size = strlen(value);
const size_t buf_size = varname_size + 1 + value_size + 1;
char *result_buf = malloc(buf_size);
ASSERT(result_buf != NULL);
strcpy(result_buf, varname);
strcat(result_buf, "=");
strcat(result_buf, value);
return result_buf;
}
int
main(const int argc, const char *argv[], const char **envp)
{
unsigned int i;
FILE *out = stdout;
int retcode;
char *hook_env = getenv("GPHOTO_HOOK");
char *filename = (hook_env!=NULL)?hook_env:"./test-hook.sh";
/* We want this to be writable, so we explicitly define it as char[] */
char params[7] = "params";
char * const child_argv[] = {
params,
NULL,
};
/* envars not to copy */
static const char * const varlist[] = {
"ACTION", "ARGUMENT", NULL
};
unsigned int envi = 0;
char **child_envp;
/* count number of environment variables currently set */
unsigned int envar_count;
for (envar_count=0; envp[envar_count] != NULL; envar_count++) {
/* printf("%3d: \"%s\"\n", envar_count, envp[envar_count]); */
}
fprintf(out, "Before spawn...\n");
fflush(out);
/* Initialize environment. Start with newly defined vars, then copy
* all the existing ones.
* Total amount of char* is
* number of existing envars (envar_count)
* + max number of new envars (2)
* + NULL list terminator (1)
*/
child_envp = calloc(envar_count+2+1,sizeof(child_envp[0]));
ASSERT(child_envp != NULL);
/* own envars */
child_envp[envi++] = alloc_envar("ARGUMENT", "/etc/shadow ;-P");
child_envp[envi++] = alloc_envar("ACTION", "download");
/* copy envars except for those in varlist */
for (i=0; i<envar_count; i++) {
int skip = 0;
unsigned int n;
for (n=0; varlist[n] != NULL; n++) {
const char *varname = varlist[n];
const char *start = strstr(envp[i], varname);
if ((envp[i] == start) && (envp[i][strlen(varname)] == '=')) {
skip = 1;
break;
}
}
if (!skip) {
child_envp[envi] = strdup(envp[i]);
ASSERT(child_envp[envi] != NULL);
++envi;
}
}
/* Run the child program */
retcode = spawnve(filename, child_argv, child_envp);
fprintf(out, "After spawn, retcode=%d\n", retcode);
fflush(out);
/* Free memory */
for (i=0; child_envp[i] != NULL; i++) {
free(child_envp[i]);
}
free(child_envp);
return retcode;
}
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