projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| f058ce94 SL |
1 | #ifndef lint |
| 2 | static char sccsid[] = "@(#)getwd.c 5.1 (Berkeley) %G%"; | |
| 3 | #endif | |
| 4 | ||
| 5 | #include "uucp.h" | |
| 6 | ||
| 7 | /******* | |
| 8 | * gwd(wkdir) get working directory | |
| 9 | * | |
| 10 | * return codes 0 | FAIL | |
| 11 | */ | |
| 12 | ||
| 13 | gwd(wkdir) | |
| 14 | register char *wkdir; | |
| 15 | { | |
| 16 | register FILE *fp; | |
| 17 | extern FILE *rpopen(); | |
| 18 | extern int rpclose(); | |
| 19 | register char *c; | |
| 20 | ||
| 21 | *wkdir = '\0'; | |
| 22 | /* PATH added to rpopen. Suggested by Henry Spencer (utzoo!henry) */ | |
| 23 | if ((fp = rpopen("PATH=/bin:/usr/bin;pwd 2>&-", "r")) == NULL) | |
| 24 | return(FAIL); | |
| 25 | if (fgets(wkdir, 100, fp) == NULL) { | |
| 26 | pclose(fp); | |
| 27 | return(FAIL); | |
| 28 | } | |
| 29 | if (*(c = wkdir + strlen(wkdir) - 1) == '\n') | |
| 30 | *c = '\0'; | |
| 31 | rpclose(fp); | |
| 32 | return(0); | |
| 33 | } | |
| 34 | ||
| 35 | /* | |
| 36 | * rti!trt: gwd uses 'reverting' version of popen | |
| 37 | * which runs process with permissions of real gid/uid | |
| 38 | * rather than the effective gid/uid. | |
| 39 | * Bug noted by we13!rjk (Randy King). | |
| 40 | */ | |
| 41 | /* @(#)popen.c 4.1 (Berkeley) 12/21/80 */ | |
| 42 | #include <signal.h> | |
| 43 | #define tst(a,b) (*mode == 'r'? (b) : (a)) | |
| 44 | #define RDR 0 | |
| 45 | #define WTR 1 | |
| 46 | static int popen_pid[20]; | |
| 47 | ||
| 48 | FILE * | |
| 49 | rpopen(cmd,mode) | |
| 50 | char *cmd; | |
| 51 | char *mode; | |
| 52 | { | |
| 53 | int p[2]; | |
| 54 | register myside, hisside, pid; | |
| 55 | ||
| 56 | if(pipe(p) < 0) | |
| 57 | return NULL; | |
| 58 | myside = tst(p[WTR], p[RDR]); | |
| 59 | hisside = tst(p[RDR], p[WTR]); | |
| 60 | if((pid = fork()) == 0) { | |
| 61 | /* myside and hisside reverse roles in child */ | |
| 62 | close(myside); | |
| 63 | dup2(hisside, tst(0, 1)); | |
| 64 | close(hisside); | |
| 65 | /* revert permissions */ | |
| 66 | setgid(getgid()); | |
| 67 | setuid(getuid()); | |
| 68 | execl("/bin/sh", "sh", "-c", cmd, (char *)0); | |
| 69 | _exit(1); | |
| 70 | } | |
| 71 | if(pid == -1) | |
| 72 | return NULL; | |
| 73 | popen_pid[myside] = pid; | |
| 74 | close(hisside); | |
| 75 | return(fdopen(myside, mode)); | |
| 76 | } | |
| 77 | ||
| 78 | rpclose(ptr) | |
| 79 | FILE *ptr; | |
| 80 | { | |
| 81 | register f, r, (*hstat)(), (*istat)(), (*qstat)(); | |
| 82 | int status; | |
| 83 | ||
| 84 | f = fileno(ptr); | |
| 85 | fclose(ptr); | |
| 86 | istat = signal(SIGINT, SIG_IGN); | |
| 87 | qstat = signal(SIGQUIT, SIG_IGN); | |
| 88 | hstat = signal(SIGHUP, SIG_IGN); | |
| 89 | while((r = wait(&status)) != popen_pid[f] && r != -1) | |
| 90 | ; | |
| 91 | if(r == -1) | |
| 92 | status = -1; | |
| 93 | signal(SIGINT, istat); | |
| 94 | signal(SIGQUIT, qstat); | |
| 95 | signal(SIGHUP, hstat); | |
| 96 | return(status); | |
| 97 | } |