1 /* execvpe() function: Execute a program, replacing the current process. 2 Copyright (C) 2020-2021 Free Software Foundation, Inc. 3 4 This file is free software: you can redistribute it and/or modify 5 it under the terms of the GNU Lesser General Public License as 6 published by the Free Software Foundation; either version 2.1 of the 7 License, or (at your option) any later version. 8 9 This file is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public License 15 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 16 17 /* Written by Bruno Haible <bruno@clisp.org>, 2020. */ 18 19 /* Don't use __attribute__ __nonnull__ in this compilation unit. Otherwise gcc 20 may optimize away the program == NULL and argv == NULL tests below. */ 21 #define _GL_ARG_NONNULL(params) 22 23 #include <config.h> 24 25 /* Specification. */ 26 #include <unistd.h> 27 28 #include <errno.h> 29 #include <stdbool.h> 30 #include <stdlib.h> 31 32 #include "findprog.h" 33 34 int 35 execvpe (const char *program, char * const *argv, char * const *env) /* */ 36 { 37 if (program == NULL 38 || argv == NULL 39 /* The callee is not expecting a NULL argv[0]. */ 40 || argv[0] == NULL 41 || env == NULL) 42 { 43 errno = EINVAL; 44 return -1; 45 } 46 47 const char *resolved_progname = 48 find_in_given_path (program, getenv ("PATH"), NULL, true); 49 if (resolved_progname == NULL) 50 return -1; 51 52 /* Invoke execve. */ 53 execve (resolved_progname, argv, env); 54 55 /* If execve returned, it must have failed. */ 56 if (resolved_progname != program) 57 free ((char *) resolved_progname); 58 return -1; 59 }