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Diffstat (limited to 'autoopts/file.c')
| -rw-r--r-- | autoopts/file.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/autoopts/file.c b/autoopts/file.c new file mode 100644 index 0000000..5a5b3eb --- /dev/null +++ b/autoopts/file.c @@ -0,0 +1,208 @@ + +/** + * \file file.c + * + * Time-stamp: "2011-08-06 08:49:35 bkorb" + * + * This file is part of AutoOpts, a companion to AutoGen. + * AutoOpts is free software. + * AutoOpts is Copyright (c) 1992-2012 by Bruce Korb - all rights reserved + * + * AutoOpts is available under any one of two licenses. The license + * in use must be one of these two and the choice is under the control + * of the user of the license. + * + * The GNU Lesser General Public License, version 3 or later + * See the files "COPYING.lgplv3" and "COPYING.gplv3" + * + * The Modified Berkeley Software Distribution License + * See the file "COPYING.mbsd" + * + * These files have the following md5sums: + * + * 43b91e8ca915626ed3818ffb1b71248b pkg/libopts/COPYING.gplv3 + * 06a1a2e4760c90ea5e1dad8dfaac4d39 pkg/libopts/COPYING.lgplv3 + * 66a5cedaf62c4b2637025f049f9b826f pkg/libopts/COPYING.mbsd + */ + +/** + * Make sure the directory containing the subject file exists and that + * the file exists or does not exist, per the option requirements. + * + * @param ftype file existence type flags + * @param pOpts program option descriptor + * @param pOD the option descriptor + */ +static void +check_existence(teOptFileType ftype, tOptions * pOpts, tOptDesc * pOD) +{ + char const * fname = pOD->optArg.argString; + struct stat sb; + + errno = 0; + + switch (ftype & FTYPE_MODE_EXIST_MASK) { + case FTYPE_MODE_MUST_NOT_EXIST: + if ((stat(fname, &sb) == 0) || (errno != ENOENT)) { + if (errno == 0) + errno = EINVAL; + fprintf(stderr, zFSOptError, errno, strerror(errno), + zFSOptErrNoExist, fname, pOD->pz_Name); + pOpts->pUsageProc(pOpts, EXIT_FAILURE); + /* NOTREACHED */ + } + /* FALLTHROUGH */ + + default: + case FTYPE_MODE_MAY_EXIST: + { + char * p = strrchr(fname, DIRCH); + size_t l; + + if (p == NULL) + /* + * The file may or may not exist and its directory is ".". + * Assume that "." exists. + */ + break; + + l = p - fname; + p = AGALOC(l + 1, "fname"); + memcpy(p, fname, l); + p[l] = NUL; + + if ((stat(p, &sb) != 0) || (errno = EINVAL, ! S_ISDIR(sb.st_mode))) { + fprintf(stderr, zFSOptError, errno, strerror(errno), + zFSOptErrMayExist, fname, pOD->pz_Name); + pOpts->pUsageProc(pOpts, EXIT_FAILURE); + /* NOTREACHED */ + } + AGFREE(p); + break; + } + + case FTYPE_MODE_MUST_EXIST: + if ( (stat(fname, &sb) != 0) + || (errno = EINVAL, ! S_ISREG(sb.st_mode)) ) { + fprintf(stderr, zFSOptError, errno, strerror(errno), + zFSOptErrMustExist, fname, + pOD->pz_Name); + pOpts->pUsageProc(pOpts, EXIT_FAILURE); + /* NOTREACHED */ + } + break; + } +} + +/** + * Open the specified file with open(2) and save the FD. + * + * @param pOpts program option descriptor + * @param pOD the option descriptor + * @param mode the open mode (uses int flags value) + */ +static void +open_file_fd(tOptions * pOpts, tOptDesc * pOD, tuFileMode mode) +{ + int fd = open(pOD->optArg.argString, mode.file_flags); + if (fd < 0) { + fprintf(stderr, zFSOptError, errno, strerror(errno), + zFSOptErrOpen, pOD->optArg.argString, pOD->pz_Name); + pOpts->pUsageProc(pOpts, EXIT_FAILURE); + /* NOTREACHED */ + } + + if ((pOD->fOptState & OPTST_ALLOC_ARG) != 0) + pOD->optCookie = (void *)pOD->optArg.argString; + else + AGDUPSTR(pOD->optCookie, pOD->optArg.argString, "file name"); + + pOD->optArg.argFd = fd; + pOD->fOptState &= ~OPTST_ALLOC_ARG; +} + +/** + * Open the specified file with open(2) and save the FD. + * + * @param pOpts program option descriptor + * @param pOD the option descriptor + * @param mode the open mode (uses "char *" mode value) + */ +static void +fopen_file_fp(tOptions * pOpts, tOptDesc * pOD, tuFileMode mode) +{ + FILE* fp = fopen(pOD->optArg.argString, mode.file_mode); + if (fp == NULL) { + fprintf(stderr, zFSOptError, errno, strerror(errno), + zFSOptErrFopen, pOD->optArg.argString, pOD->pz_Name); + pOpts->pUsageProc(pOpts, EXIT_FAILURE); + /* NOTREACHED */ + } + + if ((pOD->fOptState & OPTST_ALLOC_ARG) != 0) + pOD->optCookie = (void *)pOD->optArg.argString; + else + AGDUPSTR(pOD->optCookie, pOD->optArg.argString, "file name"); + + pOD->optArg.argFp = fp; + pOD->fOptState &= ~OPTST_ALLOC_ARG; +} + +/*=export_func optionFileCheck + * private: + * + * what: Decipher a boolean value + * arg: + tOptions* + pOpts + program options descriptor + + * arg: + tOptDesc* + pOptDesc + the descriptor for this arg + + * arg: + teOptFileType + ftype + File handling type + + * arg: + tuFileMode + mode + file open mode (if needed) + + * + * doc: + * Make sure the named file conforms with the file type mode. + * The mode specifies if the file must exist, must not exist or may + * (or may not) exist. The mode may also specify opening the + * file: don't, open just the descriptor (fd), or open as a stream + * (FILE* pointer). +=*/ +void +optionFileCheck(tOptions * pOpts, tOptDesc * pOD, + teOptFileType ftype, tuFileMode mode) +{ + if (pOpts <= OPTPROC_EMIT_LIMIT) { + if (pOpts != OPTPROC_EMIT_USAGE) + return; + + switch (ftype & FTYPE_MODE_EXIST_MASK) { + case FTYPE_MODE_MUST_NOT_EXIST: + fputs(zFileCannotExist, option_usage_fp); + break; + + case FTYPE_MODE_MUST_EXIST: + fputs(zFileMustExist, option_usage_fp); + break; + } + return; + } + + if ((pOD->fOptState & OPTST_RESET) != 0) { + if (pOD->optCookie != NULL) + AGFREE(pOD->optCookie); + return; + } + + check_existence(ftype, pOpts, pOD); + + switch (ftype & FTYPE_MODE_OPEN_MASK) { + default: + case FTYPE_MODE_NO_OPEN: break; + case FTYPE_MODE_OPEN_FD: open_file_fd( pOpts, pOD, mode); break; + case FTYPE_MODE_FOPEN_FP: fopen_file_fp(pOpts, pOD, mode); break; + } +} +/* + * Local Variables: + * mode: C + * c-file-style: "stroustrup" + * indent-tabs-mode: nil + * End: + * end of autoopts/file.c */ |