tools/lib/subcmd/exec-cmd.c

Source file repositories/reference/linux-study-clean/tools/lib/subcmd/exec-cmd.c

File Facts

System
Linux kernel
Corpus path
tools/lib/subcmd/exec-cmd.c
Extension
.c
Size
4347 bytes
Lines
219
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

int execv_cmd(const char **argv) {
	const char **nargv = prepare_exec_cmd(argv);

	/* execvp() can only ever return if it fails */
	execvp(subcmd_config.exec_name, (char **)nargv);

	free(nargv);
	return -1;
}


int execl_cmd(const char *cmd,...)
{
	int argc;
	const char *argv[MAX_ARGS + 1];
	const char *arg;
	va_list param;

	va_start(param, cmd);
	argv[0] = cmd;
	argc = 1;
	while (argc < MAX_ARGS) {
		arg = argv[argc++] = va_arg(param, char *);
		if (!arg)
			break;
	}
	va_end(param);
	if (MAX_ARGS <= argc) {
		fprintf(stderr, " Error: too many args to run %s\n", cmd);
		return -1;
	}

	argv[argc] = NULL;
	return execv_cmd(argv);
}

Annotation

Implementation Notes