diff options
Diffstat (limited to 'xinit.c')
| -rw-r--r-- | xinit.c | 104 |
1 files changed, 26 insertions, 78 deletions
@@ -68,30 +68,11 @@ in this Software without prior written authorization from The Open Group. #endif #include <stdlib.h> -extern char **environ; -char **newenviron = NULL; -char **newenvironlast = NULL; #ifndef SHELL #define SHELL "sh" #endif -#ifndef HAVE_WORKING_VFORK -# ifndef vfork -# define vfork() fork() -# endif -#else -# ifdef HAVE_VFORK_H -# include <vfork.h> -# endif -#endif - -#ifdef HAS_EXECVPE -#define Execvpe(path, argv, envp) execvpe(path, argv, envp) -#else -#define Execvpe(path, argv, envp) execvp(path, argv) -#endif - const char *bindir = BINDIR; const char * const server_names[] = { #ifdef __APPLE__ @@ -147,7 +128,7 @@ int serverpid = -1; int clientpid = -1; volatile int gotSignal = 0; -static void Execute(char **vec, char **envp); +static void Execute(char **vec); static Bool waitforserver(void); static Bool processTimeout(int timeout, char *string); static int startServer(char *server[]); @@ -186,14 +167,13 @@ sigUsr1(int sig) } static void -Execute(char **vec, /* has room from up above */ - char **envp) +Execute(char **vec) /* has room from up above */ { - Execvpe(vec[0], vec, envp); + execvp(vec[0], vec); if (access(vec[0], R_OK) == 0) { - vec--; /* back it up to stuff shell in */ - vec[0] = SHELL; - Execvpe(vec[0], vec, envp); + vec--; /* back it up to stuff shell in */ + vec[0] = SHELL; + execvp(vec[0], vec); } return; } @@ -319,11 +299,6 @@ main(int argc, char *argv[]) } /* - * put the display name into the environment - */ - set_environment(); - - /* * Start the server and client. */ #ifdef SIGCHLD @@ -497,7 +472,7 @@ startServer(char *server[]) * if client is xterm -L */ setpgid(0,getpid()); - Execute(server, environ); + Execute(server); Error("no server \"%s\" in PATH\n", server[0]); { const char * const *cpp; @@ -629,35 +604,39 @@ setWindowPath(void) windowpath = getenv("WINDOWPATH"); numn = snprintf(nums, sizeof(nums), "%lu", num); if (!windowpath) { - len = 10 + 1 + numn + 1; + len = numn + 1; newwindowpath = malloc(len); if (newwindowpath == NULL) return; - snprintf(newwindowpath, len, "WINDOWPATH=%s", nums); + snprintf(newwindowpath, len, "%s", nums); } else { - len = 10 + 1 + strlen(windowpath) + 1 + numn + 1; + len = strlen(windowpath) + 1 + numn + 1; newwindowpath = malloc(len); if (newwindowpath == NULL) return; - snprintf(newwindowpath, len, "WINDOWPATH=%s:%s", + snprintf(newwindowpath, len, "%s:%s", windowpath, nums); } - *newenvironlast++ = newwindowpath; - *newenvironlast = NULL; + if (setenv("WINDOWPATH", newwindowpath, TRUE) == -1) + fprintf(stderr, "%s: unable to set WINDOWPATH\n", program); + + free(newwindowpath); } static int startClient(char *client[]) { - setWindowPath(); - if ((clientpid = vfork()) == 0) { + clientpid = fork(); + if (clientpid == 0) { + set_environment(); + setWindowPath(); + if (setuid(getuid()) == -1) { Error("cannot change uid: %s\n", strerror(errno)); _exit(ERR_EXIT); } setpgid(0, getpid()); - environ = newenviron; - Execute(client,newenviron); + Execute(client); Error("no program named \"%s\" in PATH\r\n", client[0]); fprintf(stderr, "\nSpecify a program on the command line or make sure that %s\r\n", bindir); @@ -665,8 +644,9 @@ startClient(char *client[]) "is in your path.\r\n"); fprintf(stderr, "\n"); _exit(ERR_EXIT); + } else { + return clientpid; } - return (clientpid); } #ifndef HAVE_KILLPG @@ -733,45 +713,13 @@ shutdown(void) return; } - -/* - * make a new copy of environment that has room for DISPLAY - */ - static void set_environment(void) { - int nenvvars; - char **newPtr, **oldPtr; - static char displaybuf[512]; - - /* count number of environment variables */ - for (oldPtr = environ; *oldPtr; oldPtr++) ; - - nenvvars = (oldPtr - environ); - newenviron = (char **) malloc((nenvvars + 3) * sizeof(char **)); - if (!newenviron) { - fprintf(stderr, - "%s: unable to allocate %d pointers for environment\n", - program, nenvvars + 3); - exit(1); - } - - /* put DISPLAY=displayname as first element */ - snprintf(displaybuf, sizeof(displaybuf), "DISPLAY=%s", displayNum); - newPtr = newenviron; - *newPtr++ = displaybuf; - - /* copy pointers to other variables */ - for (oldPtr = environ; *oldPtr; oldPtr++) { - if (strncmp(*oldPtr, "DISPLAY=", 8) != 0 - && strncmp(*oldPtr, "WINDOWPATH=", 11) != 0) { - *newPtr++ = *oldPtr; - } + if (setenv("DISPLAY", displayNum, TRUE) == -1) { + fprintf(stderr, "%s: unable to set DISPLAY\n", program); + exit(ERR_EXIT); } - *newPtr = NULL; - newenvironlast=newPtr; - return; } static void |