pgrep,pkill: remove non-functional options

Due to limitations of the process scanning code on Windows some
features of pgrep and pkill don't work properly:

- display/matching of the full command line (-a/-f)

- killing the oldest or newest process (-o/-n)

- matching session id (-s)

To avoid disappointment or error support for these features has
been removed.

Saves 408-464 bytes.

1 files changed, 55 insertions, 0 deletions

diff --git a/procps/pgrep.c b/procps/pgrep.c
index 82e00322f..afcfa31ec 100644
--- a/procps/pgrep.c
+++ b/procps/pgrep.c
@@ -30,31 +30,49 @@
 //kbuild:lib-$(CONFIG_PKILL) += pgrep.o
 
 //usage:#define pgrep_trivial_usage
+//usage:     IF_NOT_PLATFORM_MINGW32(
 //usage:       "[-flanovx] [-s SID|-P PPID|PATTERN]"
+//usage:     )
+//usage:     IF_PLATFORM_MINGW32(
+//usage:       "[-lvx] [-P PPID|PATTERN]"
+//usage:     )
 //usage:#define pgrep_full_usage "\n\n"
 //usage:       "Display process(es) selected by regex PATTERN\n"
 //usage:     "\n        -l      Show command name too"
+//usage:     IF_NOT_PLATFORM_MINGW32(
 //usage:     "\n        -a      Show command line too"
 //usage:     "\n        -f      Match against entire command line"
 //usage:     "\n        -n      Show the newest process only"
 //usage:     "\n        -o      Show the oldest process only"
+//usage:     )
 //usage:     "\n        -v      Negate the match"
 //usage:     "\n        -x      Match whole name (not substring)"
+//usage:     IF_NOT_PLATFORM_MINGW32(
 //usage:     "\n        -s      Match session ID (0 for current)"
+//usage:     )
 //usage:     "\n        -P      Match parent process ID"
 //usage:
 //usage:#define pkill_trivial_usage
+//usage:     IF_NOT_PLATFORM_MINGW32(
 //usage:       "[-l|-SIGNAL] [-xfvnoe] [-s SID|-P PPID|PATTERN]"
+//usage:     )
+//usage:     IF_PLATFORM_MINGW32(
+//usage:       "[-l|-SIGNAL] [-xve] [-P PPID|PATTERN]"
+//usage:     )
 //usage:#define pkill_full_usage "\n\n"
 //usage:       "Send signal to processes selected by regex PATTERN\n"
 //usage:     "\n        -l      List all signals"
 //usage:     "\n        -x      Match whole name (not substring)"
+//usage:     IF_NOT_PLATFORM_MINGW32(
 //usage:     "\n        -f      Match against entire command line"
 //usage:     "\n        -s SID  Match session ID (0 for current)"
+//usage:     )
 //usage:     "\n        -P PPID Match parent process ID"
 //usage:     "\n        -v      Negate the match"
+//usage:     IF_NOT_PLATFORM_MINGW32(
 //usage:     "\n        -n      Signal the newest process only"
 //usage:     "\n        -o      Signal the oldest process only"
+//usage:     )
 //usage:     "\n        -e      Display name and PID of the process being killed"
 
 #include "libbb.h"
@@ -68,25 +86,47 @@ enum {
         /* "vlafxones:+P:+" */
         OPTBIT_V = 0, /* must be first, we need OPT_INVERT = 0/1 */
         OPTBIT_L,
+#if !ENABLE_PLATFORM_MINGW32
         OPTBIT_A,
         OPTBIT_F,
+#else
+#define OPTBIT_A OPTBIT_L
+#endif
         OPTBIT_X,
+#if !ENABLE_PLATFORM_MINGW32
         OPTBIT_O,
         OPTBIT_N,
+#endif
         OPTBIT_E, /* should be pkill-only, do we care? */
+#if !ENABLE_PLATFORM_MINGW32
         OPTBIT_S,
+#endif
         OPTBIT_P,
 };
 
 #define OPT_INVERT      (opt & (1 << OPTBIT_V))
 #define OPT_LIST        (opt & (1 << OPTBIT_L))
+#if ENABLE_PLATFORM_MINGW32
+#define OPT_LISTFULL    (0)
+#define OPT_FULL        (0)
+#else
 #define OPT_LISTFULL    (opt & (1 << OPTBIT_A))
 #define OPT_FULL        (opt & (1 << OPTBIT_F))
+#endif
 #define OPT_ANCHOR      (opt & (1 << OPTBIT_X))
+#if ENABLE_PLATFORM_MINGW32
+#define OPT_FIRST       (0)
+#define OPT_LAST        (0)
+#else
 #define OPT_FIRST       (opt & (1 << OPTBIT_O))
 #define OPT_LAST        (opt & (1 << OPTBIT_N))
+#endif
 #define OPT_ECHO        (opt & (1 << OPTBIT_E))
+#if ENABLE_PLATFORM_MINGW32
+#define OPT_SID         (0)
+#else
 #define OPT_SID         (opt & (1 << OPTBIT_S))
+#endif
 #define OPT_PPID        (opt & (1 << OPTBIT_P))
 
 static void act(unsigned pid, char *cmd, int signo)
@@ -112,7 +152,12 @@ int pgrep_main(int argc UNUSED_PARAM, char **argv)
         unsigned opt;
         int scan_mask;
         int matched_pid;
+#if ENABLE_PLATFORM_MINGW32
+        const int sid2match = -1;
+        int ppid2match;
+#else
         int sid2match, ppid2match;
+#endif
         char *cmd_last;
         procps_status_t *proc;
         /* These are initialized to 0 */
@@ -137,8 +182,12 @@ int pgrep_main(int argc UNUSED_PARAM, char **argv)
 
         /* Parse remaining options */
         ppid2match = -1;
+#if !ENABLE_PLATFORM_MINGW32
         sid2match = -1;
         opt = getopt32(argv, "vlafxones:+P:+", &sid2match, &ppid2match);
+#else
+        opt = getopt32(argv, "vlxeP:+", &ppid2match);
+#endif
         argv += optind;
 
         if (pkill && OPT_LIST) { /* -l: print the whole signal list */
@@ -147,8 +196,10 @@ int pgrep_main(int argc UNUSED_PARAM, char **argv)
         }
 
         pid = getpid();
+#if !ENABLE_PLATFORM_MINGW32
         if (sid2match == 0)
                 sid2match = getsid(pid);
+#endif
 
         scan_mask = PSSCAN_COMM | PSSCAN_ARGV0;
         if (OPT_FULL)
@@ -180,6 +231,9 @@ int pgrep_main(int argc UNUSED_PARAM, char **argv)
                 }
 
                 cmdlen = -1;
+#if ENABLE_PLATFORM_MINGW32
+                cmd = proc->comm;
+#else
                 cmd = proc->argv0;
                 if (!cmd) {
                         cmd = proc->comm;
@@ -199,6 +253,7 @@ int pgrep_main(int argc UNUSED_PARAM, char **argv)
                                         cmd[i] = ' ';
                         }
                 }
+#endif
 
                 if (OPT_INVERT) {
                         /* "pgrep -v -P1 firefox" means "not (ppid=1 AND name=firefox)"