badvpn/ncd/extra/build_cmdline.c
2014-11-25 22:30:11 +01:00

111 lines
3.7 KiB
C

/**
* @file build_cmdline.c
* @author Ambroz Bizjak <ambrop7@gmail.com>
*
* @section LICENSE
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdlib.h>
#include <misc/debug.h>
#include <ncd/extra/value_utils.h>
#include "build_cmdline.h"
int ncd_build_cmdline (NCDModuleInst *i, int log_channel, NCDValRef cmd_arg, char **out_exec, CmdLine *out_cl)
{
ASSERT(!NCDVal_IsInvalid(cmd_arg))
ASSERT(out_exec)
ASSERT(out_cl)
if (!NCDVal_IsList(cmd_arg)) {
NCDModuleInst_Backend_Log(i, log_channel, BLOG_ERROR, "wrong type");
goto fail0;
}
size_t count = NCDVal_ListCount(cmd_arg);
// read exec
if (count == 0) {
NCDModuleInst_Backend_Log(i, log_channel, BLOG_ERROR, "missing executable name");
goto fail0;
}
NCDValRef exec_arg = NCDVal_ListGet(cmd_arg, 0);
if (!NCDVal_IsStringNoNulls(exec_arg)) {
NCDModuleInst_Backend_Log(i, log_channel, BLOG_ERROR, "wrong type");
goto fail0;
}
char *exec = ncd_strdup(exec_arg);
if (!exec) {
NCDModuleInst_Backend_Log(i, log_channel, BLOG_ERROR, "ncd_strdup failed");
goto fail0;
}
// start cmdline
CmdLine cl;
if (!CmdLine_Init(&cl)) {
NCDModuleInst_Backend_Log(i, log_channel, BLOG_ERROR, "CmdLine_Init failed");
goto fail1;
}
// add header
if (!CmdLine_Append(&cl, exec)) {
NCDModuleInst_Backend_Log(i, log_channel, BLOG_ERROR, "CmdLine_Append failed");
goto fail2;
}
// add additional arguments
for (size_t j = 1; j < count; j++) {
NCDValRef arg = NCDVal_ListGet(cmd_arg, j);
if (!NCDVal_IsStringNoNulls(arg)) {
NCDModuleInst_Backend_Log(i, log_channel, BLOG_ERROR, "wrong type");
goto fail2;
}
if (!CmdLine_AppendNoNullMr(&cl, NCDVal_StringMemRef(arg))) {
NCDModuleInst_Backend_Log(i, log_channel, BLOG_ERROR, "CmdLine_AppendNoNullMr failed");
goto fail2;
}
}
// finish
if (!CmdLine_Finish(&cl)) {
NCDModuleInst_Backend_Log(i, log_channel, BLOG_ERROR, "CmdLine_Finish failed");
goto fail2;
}
*out_exec = exec;
*out_cl = cl;
return 1;
fail2:
CmdLine_Free(&cl);
fail1:
free(exec);
fail0:
return 0;
}