ps: exploited that newly added field 'executable path'

Signed-off-by: Jim Warner <james.warner@comcast.net>

ps/common.h

@@ -75,6 +75,7 @@ makEXT(CGROUP)
 makEXT(CMD)
 makEXT(CMDLINE)
 makEXT(ENVIRON)
+makEXT(EXE)
 makEXT(FLAGS)
 makEXT(FLT_MAJ)
 makEXT(FLT_MAJ_C)

ps/global.c

@@ -65,6 +65,7 @@ makREL(CGROUP)
 makREL(CMD)
 makREL(CMDLINE)
 makREL(ENVIRON)
+makREL(EXE)
 makREL(FLAGS)
 makREL(FLT_MAJ)
 makREL(FLT_MAJ_C)

ps/output.c

@@ -1159,6 +1159,12 @@ setREL2(STATE,PROCESSOR)
   return snprintf(outbuf, COLWID, "*");
 }
 
+/* full path to executable */
+static int pr_exe(char *restrict const outbuf, const proc_t *restrict const pp){
+setREL1(EXE)
+    return snprintf(outbuf, COLWID, "%s", rSv(EXE, str, pp));
+}
+
 /************************* Systemd stuff ********************************/
 static int pr_sd_unit(char *restrict const outbuf, const proc_t *restrict const pp){
 setREL1(SD_UNIT)
@@ -1442,6 +1448,7 @@ static const format_struct format_array[] = { /*
 {"etimes",    "ELAPSED", pr_etimes,        PIDS_TIME_ELAPSED,        7,    BSD,  ET|RIGHT}, /* FreeBSD */
 {"euid",      "EUID",    pr_euid,          PIDS_ID_EUID,             5,    LNX,  ET|RIGHT},
 {"euser",     "EUSER",   pr_euser,         PIDS_ID_EUSER,            8,    LNX,  ET|USER},
+{"exe",       "EXE",     pr_exe,           PIDS_EXE,                27,    LNX,  PO|UNLIMITED},
 {"f",         "F",       pr_flag,          PIDS_FLAGS,               1,    XXX,  ET|RIGHT}, /*flags*/
 {"fgid",      "FGID",    pr_fgid,          PIDS_FLAGS,               5,    LNX,  ET|RIGHT},
 {"fgroup",    "FGROUP",  pr_fgroup,        PIDS_ID_FGROUP,           8,    LNX,  ET|USER},

ps/ps.1

@@ -1243,6 +1243,14 @@ option can be used to force the decimal representation.  (alias
 .BR uname , \  user ).
 T}
 
+exe	EXE	T{
+path to the executable. Useful if path cannot be printed via
+.BR cmd ", " comm
+or
+.BR args
+format options.
+T}
+
 f	F	T{
 flags associated with the process, see the
 .B PROCESS FLAGS