Do not attempt to run doldacond from dolcon-launch if it does not exist.

[doldaconnect.git] / clients / gui-shell / launch.c

diff --git a/clients/gui-shell/launch.c b/clients/gui-shell/launch.c
index f31fcc2..22a82a2 100644 (file)
--- a/clients/gui-shell/launch.c
+++ b/clients/gui-shell/launch.c
@@ -23,14 +23,102 @@
 #include <string.h>
 #include <pwd.h>
 #include <libintl.h>
+#include <signal.h>
 
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif
 
-#define _(text) gettext(text)
+int running(char *pf)
+{
+    FILE *pfs;
+    char buf[1024];
+    int pid;
+    
+    if((pfs = fopen(pf, "r")) == NULL) {
+       perror(pf);
+       return(0);
+    }
+    fgets(buf, sizeof(buf), pfs);
+    fclose(pfs);
+    if((pid = atoi(buf)) == 0)
+       return(0);
+    return(!kill(pid, 0));
+}
 
-int main(int argc, char **argv)
+int haveprogram(char *name)
 {
+    char buf[1024];
+    char *p, *p2;
+    
+    p = getenv("PATH");
+    while(p != NULL) {
+       if((p2 = strchr(p, ':')) != NULL) {
+           memcpy(buf, p, p2 - p);
+           buf[p2 - p] = 0;
+           p = p2 + 1;
+       } else {
+           strcpy(buf, p);
+           p = NULL;
+       }
+       strcat(buf, "/");
+       strcat(buf, name);
+       if(!access(buf, X_OK))
+           return(1);
+    }
     return(0);
 }
+
+int main(int argc, char **argv)
+{
+    int c;
+    char cf[1024], pf[1024];
+    
+    while((c = getopt(argc, argv, "hV")) != -1) {
+       switch(c) {
+       case 'h':
+           printf("usage: dolcon-launch [-hV]\n");
+           printf("\t-h\tDisplay this help message\n");
+           printf("\t-V\tDisplay version info and exit\n");
+           printf("\n");
+           printf("\tIf $HOME/.doldacond.conf does not exist, dolcon-launch will run\n");
+           printf("\tdolconf. Otherwise, if $HOME/.doldacond.pid does not exist,\n");
+           printf("\tor does not contain a valid PID, dolcon-launch will run\n");
+           printf("\tdoldacond-shell. Otherwise, dolcon-launch will run dolcon. All\n");
+           printf("\tthese programs must be somewhere in $PATH for dolcon-launch to work.\n");
+           printf("\n");
+           printf("\tIf doldacond is not in $PATH, only running dolcon is attempted.\n");
+           exit(0);
+       case 'V':
+           printf("%s", RELEASEINFO);
+           exit(0);
+       default:
+           fprintf(stderr, "usage: dolcon-launch [-h]\n");
+           exit(1);
+       }
+    }
+    if(haveprogram("doldacond")) {
+       if(getenv("HOME") != NULL)
+           snprintf(cf, sizeof(cf), "%s/.doldacond.conf", getenv("HOME"));
+       else
+           snprintf(cf, sizeof(cf), "%s/.doldacond.conf", getpwuid(getuid())->pw_dir);
+       if(getenv("HOME") != NULL)
+           snprintf(pf, sizeof(pf), "%s/.doldacond.pid", getenv("HOME"));
+       else
+           snprintf(pf, sizeof(pf), "%s/.doldacond.pid", getpwuid(getuid())->pw_dir);
+       if(access(cf, F_OK)) {
+           execlp("dolconf", "dolconf", "-a", NULL);
+           perror("dolconf");
+       } else if(access(pf, F_OK) || !running(pf)) {
+           execlp("doldacond-shell", "doldacond-shell", NULL);
+           perror("doldacond-shell");
+       } else {
+           execlp("dolcon", "dolcon", "-l", NULL);
+           perror("dolcon");
+       }
+    } else {
+       execlp("dolcon", "dolcon", NULL);
+       perror("dolcon");
+    }
+    return(127);
+}