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Diffstat (limited to 'src/tzplatform_get.c')
| -rw-r--r-- | src/tzplatform_get.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/src/tzplatform_get.c b/src/tzplatform_get.c new file mode 100644 index 0000000..b37a5eb --- /dev/null +++ b/src/tzplatform_get.c @@ -0,0 +1,216 @@ +/* + * Copyright (C) 2013-2014 Intel Corporation. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library 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 + * + * Authors: + * José Bollo <jose.bollo@open.eurogiciel.org> + * Stéphane Desneux <stephane.desneux@open.eurogiciel.org> + * Jean-Benoit Martin <jean-benoit.martin@open.eurogiciel.org> + * + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/types.h> +#include <pwd.h> + +#include <tzplatform_config.h> + +#define basename(x) (x) + +static const char usage [] = "type '%s --help' to get help.\n"; + +static const char help [] = "\ +\n\ +usage: %s [options...] [keys...]\n\ +\n\ +options:\n\ +\n\ +-a --all all keys (must not be followed by keys)\n\ +-n --not not in the keys\n\ +-e --export prefix with export\n\ +-l --list prints only the key names, not the values\n\ +-s --space separate with spaces instead of new-lines\n\ +-q --query silently check that given variables are existing\n\ +-c --continue continue to process if error\n\ +-u --user id set the user using its 'id' (name or numeric)\n\ +\n\ +"; + +int main(int argc, char **argv) +{ + char *progname = *argv++, *user = 0; + int all = 0, not = 0, query = 0, export = 0, space = 0, list = 0, cont = 0; + int i, n, *sel, p; + enum tzplatform_variable id; + struct passwd pwd, *spw; + char buf[1024]; + + /* parse args */ + while(*argv && **argv=='-') { + char c, *opt = 1+*argv++; + while(opt) { + if (*opt == '-') { + char *x = 0; + c = *++opt; + switch(c) { + case 'a': x = "all"; break; + case 'n': x = "not"; break; + case 'q': x = "query"; break; + case 'e': x = "export"; break; + case 's': x = "space"; break; + case 'l': x = "list"; break; + case 'c': x = "continue"; break; + case 'h': x = "help"; break; + case 'u': x = "user"; break; + } + if (!x || strcmp(x,opt)) + c = 0; + opt = 0; + } + else { + c = *opt; + if (!*++opt) + opt = 0; + } + switch(c) { + case 'a': all = 1; break; + case 'n': not = 1; break; + case 'q': query = 1; break; + case 'e': export = 1; break; + case 's': space = 1; break; + case 'l': list = 1; break; + case 'c': cont = 1; break; + case 'u': user = *argv; if (user) argv++; break; + case 'h': + fprintf( stdout, help, basename(progname)); + return 0; + default: + fprintf( stderr, usage, basename(progname)); + return 1; + } + } + } + + /* some checks */ + if (query) { + if (all) { + fprintf( stderr, + "error! --all and --query aren't compatibles.\n"); + return 1; + } + if (not) { + fprintf( stderr, + "error! --not and --query aren't compatibles.\n"); + return 1; + } + if (list) { + fprintf( stderr, + "error! --list and --query aren't compatibles.\n"); + return 1; + } + if (cont) { + fprintf( stderr, + "error! --continue and --query aren't compatibles.\n"); + return 1; + } + if (space) { + fprintf( stderr, + "warning! --space option ignored for queries.\n"); + } + if (export) { + fprintf( stderr, + "warning! --export option ignored for queries.\n"); + } + } + if (all) { + if (*argv) { + fprintf( stderr, + "error! --all doesn't accept any key.\n"); + return 1; + } + /* all is like not nothing!! */ + not = 1; + } + + /* process */ + n = tzplatform_getcount(); + sel = calloc( sizeof(int), n); + if (sel == NULL) { + fprintf( stderr, "error! out of memory!\n"); + return 1; + } + + /* get the variables from the list */ + while (*argv) { + id = tzplatform_getid( *argv); + if (id == _TZPLATFORM_VARIABLES_INVALID_) { + if (query) + return 1; + fprintf( stderr, "error! %s isn't a variable.\n", *argv); + if (!cont) + return 1; + } + else { + sel[(int)id] = 1; + } + argv++; + } + + /* finished for queries */ + if (query) + return 0; + + /* set the user */ + if (user) { + for (i=0 ; '0' <= user[i] && user[i] <= '9' ; i++); + if (user[i]) + getpwnam_r(user, &pwd, buf, sizeof(buf), &spw); + else + getpwuid_r((uid_t)atoi(user), &pwd, buf, sizeof(buf), &spw); + if (!spw) { + fprintf( stderr, "error! %s isn't standing for a valid user.\n", user); + if (!cont) + return 1; + } else { + i = tzplatform_set_user(spw->pw_uid); + if (i) { + fprintf( stderr, "error! can't set the valid user %s.\n", user); + if (!cont) + return 1; + } + } + } + + /* emits the result */ + for (p = i = 0 ; i < n ; i++) { + if (sel[i] != not) { + if (p++) + printf( space ? " " : export ? "\nexport " : "\n"); + else if (export) + printf( "export "); + id = (enum tzplatform_variable) i; + printf( "%s", tzplatform_getname(id)); + if (!list) + printf( "=%s", tzplatform_getenv(id)); + } + } + if (p) + printf("\n"); + return 0; +} + |