1/*****************************************************************************/
2/* */
3/* spawn-unix.inc */
4/* */
5/* Execute other external programs (Unix version) */
6/* */
7/* */
8/* */
9/* (C) 1999-2002 Ullrich von Bassewitz */
10/* Wacholderweg 14 */
11/* D-70597 Stuttgart */
12/* EMail: uz@musoftware.de */
13/* */
14/* */
15/* This software is provided 'as-is', without any expressed or implied */
16/* warranty. In no event will the authors be held liable for any damages */
17/* arising from the use of this software. */
18/* */
19/* Permission is granted to anyone to use this software for any purpose, */
20/* including commercial applications, and to alter it and redistribute it */
21/* freely, subject to the following restrictions: */
22/* */
23/* 1. The origin of this software must not be misrepresented; you must not */
24/* claim that you wrote the original software. If you use this software */
25/* in a product, an acknowledgment in the product documentation would be */
26/* appreciated but is not required. */
27/* 2. Altered source versions must be plainly marked as such, and must not */
28/* be misrepresented as being the original software. */
29/* 3. This notice may not be removed or altered from any source */
30/* distribution. */
31/* */
32/*****************************************************************************/
33
34
35
36#include <unistd.h>
37#include <string.h>
38#include <errno.h>
39#include <sys/types.h>
40#include <sys/wait.h>
41
42
43
44/*****************************************************************************/
45/* Data */
46/*****************************************************************************/
47
48
49
50/* Mode argument for spawn. This value is ignored by the function and only
51** provided for DOS/Windows compatibility.
52*/
53#ifndef P_WAIT
54#define P_WAIT 0
55#endif
56
57
58
59/*****************************************************************************/
60/* Code */
61/*****************************************************************************/
62
63
64
65int spawnvp (int Mode attribute ((unused)), const char* File, char* const argv [])
66/* Execute the given program searching and wait until it terminates. The Mode
67** argument is ignored (compatibility only). The result of the function is
68** the return code of the program. The function will terminate the program
69** on errors.
70*/
71{
72 int Status = 0;
73
74 /* Fork */
75 int pid = fork ();
76 if (pid < 0) {
77
78 /* Error forking */
79 Error ("Cannot fork: %s", strerror (errno));
80
81 } else if (pid == 0) {
82
83 /* The son - exec the program */
84 if (execvp (File, argv) < 0) {
85 Error ("Cannot exec '%s': %s", File, strerror (errno));
86 }
87
88 } else {
89
90 /* The father: Wait for the subprocess to terminate */
91 if (waitpid (pid, &Status, 0) < 0) {
92 Error ("Failure waiting for subprocess: %s", strerror (errno));
93 }
94
95 /* Examine the child status */
96 if (!WIFEXITED (Status)) {
97 Error ("Subprocess '%s' aborted by signal %d", File, WTERMSIG (Status));
98 }
99 }
100
101 /* Only the father goes here, we place a return here regardless of that
102 ** to avoid compiler warnings.
103 */
104 return WEXITSTATUS (Status);
105}
106