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https://github.com/gryf/wmaker.git
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55959b4f7e
- this should make platform detection automagic - also fixes debian builds that broke in the meantime - fix osdep_darwin.c
97 lines
2.1 KiB
C
97 lines
2.1 KiB
C
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <WINGs/WUtil.h>
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#include "wconfig.h"
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/*
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* copy argc and argv for an existing process identified by `pid'
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* into suitable storage given in ***argv and *argc.
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*
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* subsequent calls use the same static area for argv and argc.
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*
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* returns 0 for failure, in which case argc := 0 and argv := NULL
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* returns 1 for success
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*/
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Bool GetCommandForPid(int pid, char ***argv, int *argc)
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#ifdef KERN_PROCARGS2
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{
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int j, mib[4];
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unsigned int i, idx;
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size_t count;
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static char *args = NULL;
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static int argmax = 0;
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*argv = NULL;
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*argc = 0;
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/* the system-wide limit */
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if (argmax == 0) { /* it hopefully doesn't change at runtime *g* */
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mib[0] = CTL_KERN;
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mib[1] = KERN_ARGMAX;
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mib[2] = 0;
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mib[3] = 0;
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count = sizeof(argmax);
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if (sysctl(mib, 2, &argmax, &count, NULL, 0) == -1)
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return False;
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}
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/* if argmax is still 0, something went very seriously wrong */
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assert(argmax > 0);
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/* space for args; no need to free before returning even on errors */
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if (args == NULL)
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args = (char *)wmalloc(argmax);
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/* get process args */
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mib[0] = CTL_KERN;
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mib[1] = KERN_PROCARGS2;
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mib[2] = pid;
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count = argmax;
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if (sysctl(mib, 3, args, &count, NULL, 0) == -1 || count == 0)
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return False;
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/* get argc, skip */
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memcpy(argc, args, sizeof(*argc));
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idx = sizeof(*argc);
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while (args[idx++] != '\0') /* skip execname */
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;
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while (args[idx] == '\0') /* padding too */
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idx++;
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/* args[idx] is at at begininng of args now */
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*argv = (char **)wmalloc(sizeof(char *) * (*argc + 1 /* term. null ptr */));
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(*argv)[0] = args + idx;
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/* go through args, set argv[$next] to the beginning of each string */
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for (i = 0, j = 1; i < count - idx /* do not overrun */; i++) {
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if (args[idx + i] != '\0')
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continue;
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if (args[idx + i] == '\0')
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(*argv)[j++] = &args[idx + i + 1];
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if (j == *argc)
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break;
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}
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/* the list of arguments must be terminated by a null pointer */
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(*argv)[j] = NULL;
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return True;
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}
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#else /* !KERN_PROCARGS2 */
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{
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*argv = NULL;
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*argc = 0;
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return False;
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}
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#endif
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