3 #include <sys/sysctl.h>
9 #include <WINGs/WUtil.h>
14 * copy argc and argv for an existing process identified by `pid'
15 * into suitable storage given in ***argv and *argc.
17 * subsequent calls use the same static area for argv and argc.
19 * returns 0 for failure, in which case argc := 0 and argv := NULL
20 * returns 1 for success
22 Bool
GetCommandForPid(int pid
, char ***argv
, int *argc
)
28 static char *args
= NULL
;
29 static int argmax
= 0;
34 /* the system-wide limit */
35 if (argmax
== 0) { /* it hopefully doesn't change at runtime *g* */
41 count
= sizeof(argmax
);
42 if (sysctl(mib
, 2, &argmax
, &count
, NULL
, 0) == -1)
46 /* if argmax is still 0, something went very seriously wrong */
49 /* space for args; no need to free before returning even on errors */
51 args
= (char *)wmalloc(argmax
);
53 /* get process args */
55 mib
[1] = KERN_PROCARGS2
;
59 if (sysctl(mib
, 3, args
, &count
, NULL
, 0) == -1 || count
== 0)
63 memcpy(argc
, args
, sizeof(*argc
));
66 while (args
[idx
++] != '\0') /* skip execname */
68 while (args
[idx
] == '\0') /* padding too */
70 /* args[idx] is at at begininng of args now */
72 *argv
= (char **)wmalloc(sizeof(char *) * (*argc
+ 1 /* term. null ptr */));
73 (*argv
)[0] = args
+ idx
;
75 /* go through args, set argv[$next] to the beginning of each string */
76 for (i
= 0, j
= 1; i
< count
- idx
/* do not overrun */; i
++) {
77 if (args
[idx
+ i
] != '\0')
79 if (args
[idx
+ i
] == '\0')
80 (*argv
)[j
++] = &args
[idx
+ i
+ 1];
85 /* the list of arguments must be terminated by a null pointer */
89 #else /* !KERN_PROCARGS2 */