diff options
| -rw-r--r-- | kerberosIV/roken/simple_exec.c | 113 | ||||
| -rw-r--r-- | kerberosIV/roken/simple_exec.h | 7 |
2 files changed, 120 insertions, 0 deletions
diff --git a/kerberosIV/roken/simple_exec.c b/kerberosIV/roken/simple_exec.c new file mode 100644 index 00000000000..fe8766f712d --- /dev/null +++ b/kerberosIV/roken/simple_exec.c @@ -0,0 +1,113 @@ +/* $OpenBSD: simple_exec.c,v 1.1 1998/08/12 23:53:53 art Exp $ */ +/* $KTH: simple_exec.c,v 1.1 1998/03/19 19:41:19 joda Exp $ */ + +/* + * Copyright (c) 1998 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Kungliga Tekniska + * Högskolan and its contributors. + * + * 4. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE OR CONTRIBUTORS 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 <stdarg.h> +#include <stdlib.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <unistd.h> +#include <errno.h> + +#define EX_NOEXEC 126 +#define EX_NOTFOUND 127 + +/* return values: + -1 on `unspecified' system errors + -2 on fork failures + -3 on waitpid errors + 0- is return value from subprocess + 126 if the program couldn't be executed + 127 if the program couldn't be found + 128- is 128 + signal that killed subprocess + */ + +int +simple_execvp(const char *file, char *const args[]) +{ + pid_t pid = fork(); + switch(pid){ + case -1: + return -2; + case 0: + execvp(file, args); + exit((errno == ENOENT) ? EX_NOTFOUND : EX_NOEXEC); + default: + while(1) { + int status; + if(waitpid(pid, &status, 0) < 0) { + return -3; + } + if(WIFSTOPPED(status)) + continue; + if(WIFEXITED(status)) + return WEXITSTATUS(status); + if(WIFSIGNALED(status)) + return WTERMSIG(status) + 128; + } + } +} + +int +simple_execlp(const char *file, ...) +{ + va_list ap; + char **argv; + int argc, i; + + argc = i = 0; + va_start(ap, file); + do { + if(i == argc) { + char **tmp = realloc(argv, (argc + 5) * sizeof(*argv)); + if(tmp == NULL) { + errno = ENOMEM; + return -1; + } + argv = tmp; + argc += 5; + } + argv[i++] = va_arg(ap, char*); + } while(argv[i - 1] != NULL); + va_end(ap); + i = simple_execvp(file, argv); + free(argv); + return i; +} diff --git a/kerberosIV/roken/simple_exec.h b/kerberosIV/roken/simple_exec.h new file mode 100644 index 00000000000..e22e33423fb --- /dev/null +++ b/kerberosIV/roken/simple_exec.h @@ -0,0 +1,7 @@ +#ifndef SIMPLE_EXEC_H +#define SIMPLE_EXEC_H + +int simple_execvp(const char *file, char *const args[]); +int simple_execlp(const char *file, ...); + +#endif |