This source file includes following definitions.
- execute_and_read_line
- javaexec_version
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18 #include <config.h>
19
20
21 #include "javaversion.h"
22
23 #include <errno.h>
24 #include <stdbool.h>
25 #include <stdio.h>
26 #include <stdlib.h>
27
28 #if ENABLE_RELOCATABLE
29 # include "relocatable.h"
30 #else
31 # define relocate(pathname) (pathname)
32 # define relocate2(pathname,allocatedp) (*(allocatedp) = NULL, (pathname))
33 #endif
34
35 #include "javaexec.h"
36 #include "spawn-pipe.h"
37 #include "wait-process.h"
38 #include "error.h"
39 #include "gettext.h"
40
41 #define _(str) gettext (str)
42
43
44 #include "configmake.h"
45
46
47 struct locals
48 {
49
50 char *line;
51 };
52
53 static bool
54 execute_and_read_line (const char *progname,
55 const char *prog_path, const char * const *prog_argv,
56 void *private_data)
57 {
58 struct locals *l = (struct locals *) private_data;
59 pid_t child;
60 int fd[1];
61 FILE *fp;
62 char *line;
63 size_t linesize;
64 size_t linelen;
65 int exitstatus;
66
67
68 child = create_pipe_in (progname, prog_path, prog_argv, NULL,
69 DEV_NULL, false, true, false, fd);
70
71 if (child == -1)
72 return false;
73
74
75 fp = fdopen (fd[0], "r");
76 if (fp == NULL)
77 {
78 error (0, errno, _("fdopen() failed"));
79 return false;
80 }
81
82 line = NULL; linesize = 0;
83 linelen = getline (&line, &linesize, fp);
84 if (linelen == (size_t)(-1))
85 {
86 error (0, 0, _("%s subprocess I/O error"), progname);
87 return false;
88 }
89 if (linelen > 0 && line[linelen - 1] == '\n')
90 line[linelen - 1] = '\0';
91
92 fclose (fp);
93
94
95 exitstatus =
96 wait_subprocess (child, progname, true, false, true, false, NULL);
97 if (exitstatus != 0)
98 {
99 free (line);
100 return false;
101 }
102
103 l->line = line;
104 return false;
105 }
106
107 char *
108 javaexec_version (void)
109 {
110 const char *class_name = "javaversion";
111 char *malloc_pkgdatadir;
112 const char *pkgdatadir = relocate2 (PKGDATADIR, &malloc_pkgdatadir);
113 const char *args[1];
114 struct locals locals;
115
116 args[0] = NULL;
117 locals.line = NULL;
118 execute_java_class (class_name, &pkgdatadir, 1, true, NULL, args,
119 false, false, execute_and_read_line, &locals);
120
121 free (malloc_pkgdatadir);
122 return locals.line;
123 }