Changeset 3232 in MondoRescue for branches/3.2/mindi-busybox/coreutils/pwd.c
- Timestamp:
- Jan 1, 2014, 12:47:38 AM (10 years ago)
- File:
-
- 1 edited
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branches/3.2/mindi-busybox/coreutils/pwd.c
r2725 r3232 8 8 */ 9 9 10 //usage:#define pwd_trivial_usage 11 //usage: "" 12 //usage:#define pwd_full_usage "\n\n" 13 //usage: "Print the full filename of the current working directory" 14 //usage: 15 //usage:#define pwd_example_usage 16 //usage: "$ pwd\n" 17 //usage: "/root\n" 18 10 19 #include "libbb.h" 11 20 12 21 /* This is a NOFORK applet. Be very careful! */ 22 23 static int logical_getcwd(void) 24 { 25 struct stat st1; 26 struct stat st2; 27 char *wd; 28 char *p; 29 30 wd = getenv("PWD"); 31 if (!wd || wd[0] != '/') 32 return 0; 33 34 p = wd; 35 while (*p) { 36 /* doing strstr(p, "/.") by hand is smaller and faster... */ 37 if (*p++ != '/') 38 continue; 39 if (*p != '.') 40 continue; 41 /* we found "/.", skip to next char */ 42 p++; 43 if (*p == '.') 44 p++; /* we found "/.." */ 45 if (*p == '\0' || *p == '/') 46 return 0; /* "/./" or "/../" component: bad */ 47 } 48 49 if (stat(wd, &st1) != 0) 50 return 0; 51 if (stat(".", &st2) != 0) 52 return 0; 53 if (st1.st_ino != st2.st_ino) 54 return 0; 55 if (st1.st_dev != st2.st_dev) 56 return 0; 57 58 puts(wd); 59 return 1; 60 } 13 61 14 62 int pwd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; … … 17 65 char *buf; 18 66 67 if (ENABLE_DESKTOP) { 68 /* TODO: assume -L if $POSIXLY_CORRECT? (coreutils does that) 69 * Rationale: 70 * POSIX requires a default of -L, but most scripts expect -P 71 */ 72 unsigned opt = getopt32(argv, "LP"); 73 if ((opt & 1) && logical_getcwd()) 74 return fflush_all(); 75 } 76 19 77 buf = xrealloc_getcwd_or_warn(NULL); 20 if (buf != NULL) { 78 79 if (buf) { 21 80 puts(buf); 22 81 free(buf);
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