general/g.mapset/main.c:135:    ret = system ( buf ) ;
G_asprintf ( &buf, "%s %s/.gislock %s", lock_prog, mapset_new_path, gis_lock );

general/g.mapset/main.c:165:    system( buf );
G_asprintf ( &buf, "/bin/sh -c \"%s/etc/clean_temp > /dev/null\"", G_gisbase() );

general/g.mapsets/main_cmd.c:91&126:		system (command);
sprintf (command, "ls -C %s/%s 1>&2", G_gisdbase(), G_location());

general/g.mapsets/set_path.c:65:    if (system (command) == 0)
strcpy (command, "g.mapsets -p mapset=") & other strcat calls

general/g.setproj/get_stp.c:198&315:			G_system(buff);
sprintf(buff,"%s \"%s\" 1>&2", pager, G_convert_dirseps_to_host(Tmp_file1));

lib/g3d/g3dwindowio.c:226:    if (access (path, 0) != 0) system (command);
strcpy (path = command, "mkdir ");

lib/gis/get_datum_name.c:83:                G_system(buff);
sprintf(buff,"%s \"%s\" 1>&2",pager, G_convert_dirseps_to_host(Tmp_file));

lib/gis/get_ell_name.c:60:            G_system(buff);
sprintf(buff,"%s \"%s\" 1>&2", pager, G_convert_dirseps_to_host(Tmp_file));

lib/gis/get_projname.c:74:            G_system(buff);
sprintf(buff,"%s \"%s\" 1>&2", pager, G_convert_dirseps_to_host(Tmp_file));

lib/gis/gisbase.c:34:  system (command);
sprintf (command, "%s/etc/sroff", G_gisbase( ) );

lib/gis/gishelp.c:55:	system(buffer) ;
sprintf(buffer, "%%GRASS_PAGER%% %s", file) ; /*ifdef __MINGW32__*/
sprintf(buffer, "$GRASS_PAGER %s", file) ;/*else*/

lib/imagery/ls_groups.c:70&129:    G_system(buf);
sprintf (buf, "$GRASS_PAGER %s", tempfile);

lib/init/mke_loc.c:179:    system(buf);
sprintf (buf, "echo %s >  \"%s/%s/%s/MYNAME\"", myname, gisdbase, location_name, mapset);  &  G_convert_dirseps_to_host(buf);

lib/proj/datum.c:300:                G_system(buff);
sprintf(buff,"%s \"%s\" 1>&2", pager, G_convert_dirseps_to_host(Tmp_file));

lib/vask/V_clear.c:63:	system("clear");

raster/r.average/main.c:94:    if ((stat = system(command)))
sprintf (command, "%s -anC input=%s,%s fs=space > \"%s\"", STATS, basemap->answer, covermap->answer, tempfile1); & #define STATS "r.stats"

raster/r.average/main.c:154:    stat = system(command);
sprintf (command, "%s input=%s output=%s < \"%s\"", RECODE, basemap->answer, outputmap->answer, tempfile2); & #define RECODE "r.recode"

raster/r.coin/inter.c:32:    G_system("clear");

raster/r.coin/inter.c:51:	G_system("clear");

raster/r.coin/inter.c:87:	G_system(command);
sprintf(command,"$GRASS_PAGER %s",dumpname);

raster/r.coin/inter.c:108:	    G_system(command);
sprintf(command,"cp %s %s/%s",dumpname,G_home(),outname); 

raster/r.coin/inter.c:130:	    G_system(command);
sprintf(command,"lpr %s",dumpname);

raster/r.kappa/stats.c:47:  if (system(buf)) {
strcpy (buf, "r.stats -cin"); & many strcat() calles

lots in r.le/*, but all seem to be calls to GRASS modules, plus a series of G_system("clear") calls

raster/r.out.mpeg/main.c:82:    if (256 == G_system("ppmtompeg 2> /dev/null"))

raster/r.out.mpeg/main.c:84:    else if (256 == G_system("mpeg_encode 2> /dev/null"))

raster/r.out.mpeg/main.c:319:    if (0 != G_system(cmd))
sprintf(cmd, "%s %s", encoder, mpfilename);

raster/r.out.mpeg/main.c:351:	    G_system(cmd);
sprintf(cmd, "cd %s; \\ls %s >> %s 2> /dev/null", path, wildarg, tfile);

raster/r.out.mpeg/main.c:377:    G_system(cmd);
sprintf(cmd, "\\rm %s", tfile);

raster/r.out.mpeg/write.c:351&356:    G_system(cmd);
sprintf(cmd, "\\rm %s", file);

raster/r.report/stats.c:48:	if(system(buf))
strcpy (buf, "r.stats -acr"); & more calls to strcat

raster/r.statistics/o_average.c:30:    if (stat = system(command))
sprintf (command, "%s -an input='%s,%s' fs=space > %s", STATS, basemap, covermap, tempfile1); & #define STATS "r.stats"

raster/r.statistics/o_average.c:70:    stat = system(command);
sprintf (command, "%s input='%s' output='%s' < %s", RECLASS, basemap, outputmap, tempfile2); & #define RECLASS "r.reclass"

raster/r.statistics/o_sum.c:31:    if (stat = system(command))
sprintf (command, "%s -cn input='%s,%s' fs=space > %s", STATS, basemap, covermap, tempfile1); & #define STATS "r.stats"

raster/r.statistics/o_sum.c:72:    stat = system(command);
sprintf (command, "%s input='%s' output='%s' < %s", RECLASS, basemap, outputmap, tempfile2); & #define RECLASS "r.reclass"

raster/r.support/front/run.c:19:    if ((stat = G_system(buf)))
G_snprintf(buf, sizeof(buf), "%s/etc/support/%s '%s'", G_gisbase(), pgm, rast); 

raster/r.support/front/run.c:37:    if ((stat = G_system(buf)))
G_snprintf(buf, sizeof(buf), "%s", pgm);

raster/r.support/modhead/check_un.c:63:    G_system(command);
G_snprintf(command, sizeof(command), "$GRASS_PAGER %s", tempfile);

raster/r.topmodel/misc.c:10:	if(G_system(cmd)){
where command can be one of a series of GRASS modules

raster/r.transect/main.c:135:    exit (system(command));
sprintf (command, "r.profile %s input='%s' output='-' null='%s' profile=", coord_str, parms.map->answer, parms.null_str->answer); & more strcat() calls

raster/r.watershed/front/main.c:318:	ret = system(command);
sprintf (command, "%s/etc/water/", G_gisbase()) ; & (strcat(command,"r.watershed.seg") ||  strcat(command,"r.watershed.ram") & more strcat() calls

raster/r.watershed/shed/main.c:36:	    if (G_system (input.com_line_ram)) {

raster/r.watershed/shed/main.c:40:    		if (G_system (input.com_line_seg)) {

raster/r.watershed/shed/main.c:47:	  } else if (G_system (input.com_line_seg)) {

vector/v.transform/creat_trans.c:66:	G_system("clear") ;

visualization/nviz/src/do_zoom.c:169:	if (system(cmd) != 0) {
strcpy(cmd, "pnmcat -lr "); & more strcat() calls

visualization/nviz/src/do_zoom.c:184:    if (system(cmd2) != 0) {
strcpy(cmd2, "pnmcat -tb "); & more strcat() calls

visualization/xganim/main.c:512:	    system(cmd);
sprintf(cmd, "cd %s; \\ls %s >> %s 2> /dev/null", path, wildarg, tfile);