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Diffstat (limited to 'libmailutils/permstr.c')
-rw-r--r-- | libmailutils/permstr.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/libmailutils/permstr.c b/libmailutils/permstr.c new file mode 100644 index 000000000..d3d184a70 --- /dev/null +++ b/libmailutils/permstr.c @@ -0,0 +1,128 @@ +/* GNU Mailutils -- a suite of utilities for electronic mail + Copyright (C) 2008, 2010 Free Software Foundation, Inc. + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 3 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General + Public License along with this library; if not, write to the + Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + Boston, MA 02110-1301 USA */ + +#if HAVE_CONFIG_H +# include <config.h> +#endif +#include <mailutils/stream.h> +#include <mailutils/mutil.h> +#include <mailutils/errno.h> + +#define FILE_PERM_READ 0x1 +#define FILE_PERM_WRITE 0x2 + +static int +parse_perm_bits (int *pmode, const char *str, const char **endp) +{ + switch (*str) + { + case '+': + case '=': + str++; + break; + + default: + if (endp) + *endp = str; + return 1; + } + + for (; *str; str++) + { + switch (*str) + { + case 'r': + *pmode |= FILE_PERM_READ; + break; + + case 'w': + *pmode |= FILE_PERM_WRITE; + break; + + case ',': + if (endp) + *endp = str; + return 0; + + default: + if (endp) + *endp = str; + return 1; + } + } + if (endp) + *endp = str; + return 0; +} + +/* Parse a MU stream permission specification in form: + + g(+|=)[wr]+,o(+|=)[wr]+ + + Return 0 on success. + On failure, return MU_ERR_FAILURE and point endp to the offending character. +*/ +int +mu_parse_stream_perm_string (int *pmode, const char *str, const char **endp) +{ + int mode = 0; + int f; + while (*str) + { + switch (*str) + { + case 'g': + if (parse_perm_bits (&f, str + 1, &str)) + { + if (endp) + *endp = str; + return MU_ERR_FAILURE; + } + if (f & FILE_PERM_READ) + mode |= MU_STREAM_IRGRP; + if (f & FILE_PERM_WRITE) + mode |= MU_STREAM_IWGRP; + break; + + case 'o': + if (parse_perm_bits (&f, str + 1, &str)) + { + if (endp) + *endp = str; + return MU_ERR_FAILURE; + } + if (f & FILE_PERM_READ) + mode |= MU_STREAM_IROTH; + if (f & FILE_PERM_WRITE) + mode |= MU_STREAM_IWOTH; + break; + + default: + if (endp) + *endp = str; + return MU_ERR_FAILURE; + } + if (*str == ',') + str++; + } + *pmode = mode; + if (endp) + *endp = str; + return 0; +} + |