|
| 1 | +/*------------------------------------------------------------------------- |
| 2 | + * |
| 3 | + * pgfnames.c |
| 4 | + * directory handling functions |
| 5 | + * |
| 6 | + * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group |
| 7 | + * Portions Copyright (c) 1994, Regents of the University of California |
| 8 | + * |
| 9 | + * IDENTIFICATION |
| 10 | + * src/common/pgfnames.c |
| 11 | + * |
| 12 | + *------------------------------------------------------------------------- |
| 13 | + */ |
| 14 | + |
| 15 | +#ifndef FRONTEND |
| 16 | +#include "postgres.h" |
| 17 | +#else |
| 18 | +#include "postgres_fe.h" |
| 19 | +#endif |
| 20 | + |
| 21 | +#include <dirent.h> |
| 22 | + |
| 23 | +/* |
| 24 | + * pgfnames |
| 25 | + * |
| 26 | + * return a list of the names of objects in the argument directory. Caller |
| 27 | + * must call pgfnames_cleanup later to free the memory allocated by this |
| 28 | + * function. |
| 29 | + */ |
| 30 | +char ** |
| 31 | +pgfnames(const char *path) |
| 32 | +{ |
| 33 | + DIR *dir; |
| 34 | + struct dirent *file; |
| 35 | + char **filenames; |
| 36 | + int numnames = 0; |
| 37 | + int fnsize = 200; /* enough for many small dbs */ |
| 38 | + |
| 39 | + dir = opendir(path); |
| 40 | + if (dir == NULL) |
| 41 | + { |
| 42 | +#ifndef FRONTEND |
| 43 | + elog(WARNING, "could not open directory \"%s\": %m", path); |
| 44 | +#else |
| 45 | + fprintf(stderr, _("could not open directory \"%s\": %s\n"), |
| 46 | + path, strerror(errno)); |
| 47 | +#endif |
| 48 | + return NULL; |
| 49 | + } |
| 50 | + |
| 51 | + filenames = (char **) palloc(fnsize * sizeof(char *)); |
| 52 | + |
| 53 | + errno = 0; |
| 54 | + while ((file = readdir(dir)) != NULL) |
| 55 | + { |
| 56 | + if (strcmp(file->d_name, ".") != 0 && strcmp(file->d_name, "..") != 0) |
| 57 | + { |
| 58 | + if (numnames + 1 >= fnsize) |
| 59 | + { |
| 60 | + fnsize *= 2; |
| 61 | + filenames = (char **) repalloc(filenames, |
| 62 | + fnsize * sizeof(char *)); |
| 63 | + } |
| 64 | + filenames[numnames++] = pstrdup(file->d_name); |
| 65 | + } |
| 66 | + errno = 0; |
| 67 | + } |
| 68 | +#ifdef WIN32 |
| 69 | + |
| 70 | + /* |
| 71 | + * This fix is in mingw cvs (runtime/mingwex/dirent.c rev 1.4), but not in |
| 72 | + * released version |
| 73 | + */ |
| 74 | + if (GetLastError() == ERROR_NO_MORE_FILES) |
| 75 | + errno = 0; |
| 76 | +#endif |
| 77 | + if (errno) |
| 78 | + { |
| 79 | +#ifndef FRONTEND |
| 80 | + elog(WARNING, "could not read directory \"%s\": %m", path); |
| 81 | +#else |
| 82 | + fprintf(stderr, _("could not read directory \"%s\": %s\n"), |
| 83 | + path, strerror(errno)); |
| 84 | +#endif |
| 85 | + } |
| 86 | + |
| 87 | + filenames[numnames] = NULL; |
| 88 | + |
| 89 | + closedir(dir); |
| 90 | + |
| 91 | + return filenames; |
| 92 | +} |
| 93 | + |
| 94 | + |
| 95 | +/* |
| 96 | + * pgfnames_cleanup |
| 97 | + * |
| 98 | + * deallocate memory used for filenames |
| 99 | + */ |
| 100 | +void |
| 101 | +pgfnames_cleanup(char **filenames) |
| 102 | +{ |
| 103 | + char **fn; |
| 104 | + |
| 105 | + for (fn = filenames; *fn; fn++) |
| 106 | + pfree(*fn); |
| 107 | + |
| 108 | + pfree(filenames); |
| 109 | +} |
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