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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:38:56 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:38:56 +0000 |
commit | 6c20c8ed2cb9ab69a1a57ccb2b9b79969a808321 (patch) | |
tree | f63ce19d57fad3ac4a15bc26dbfbfa2b834111b5 /examples/loadables/setpgid.c | |
parent | Initial commit. (diff) | |
download | bash-6c20c8ed2cb9ab69a1a57ccb2b9b79969a808321.tar.xz bash-6c20c8ed2cb9ab69a1a57ccb2b9b79969a808321.zip |
Adding upstream version 5.2.15.upstream/5.2.15upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'examples/loadables/setpgid.c')
-rw-r--r-- | examples/loadables/setpgid.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/examples/loadables/setpgid.c b/examples/loadables/setpgid.c new file mode 100644 index 0000000..e56fd51 --- /dev/null +++ b/examples/loadables/setpgid.c @@ -0,0 +1,121 @@ +/* setpgid.c: bash loadable wrapper for setpgid system call + + An example of how to wrap a system call with a loadable builtin. + + Originally contributed by Jason Vas Dias <jason.vas.dias@gmail.com> + + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif +#include <errno.h> +#include <string.h> + +#include "bashtypes.h" +#include "posixtime.h" + +#include <stdio.h> + +#include "builtins.h" +#include "shell.h" +#include "common.h" + +#include "bashgetopt.h" + +#if !defined (_POSIX_VERSION) +# define setpgid(pid, pgrp) setpgrp (pid, pgrp) +#endif + +int +setpgid_builtin (list) + WORD_LIST *list; +{ + register WORD_LIST *wl; + intmax_t pid_arg, pgid_arg; + pid_t pid, pgid; + char *pidstr, *pgidstr; + + wl = list; + pid = pgid = 0; + + if (wl == 0 || wl->next == 0) + { + builtin_usage (); + return (EX_USAGE); + } + + pidstr = wl->word ? wl->word->word : 0; + pgidstr = wl->next->word ? wl->next->word->word : 0; + + if (pidstr == 0 || pgidstr == 0) + { + builtin_usage (); + return (EX_USAGE); + } + + if (legal_number (pidstr, &pid_arg) == 0) + { + builtin_error ("%s: pid argument must be numeric", pidstr); + return (EXECUTION_FAILURE); + } + if (pid_arg < 0) + { + builtin_error("%s: negative pid values not allowed", pidstr); + return (EXECUTION_FAILURE); + } + pid = pid_arg; + + if (legal_number (pgidstr, &pgid_arg) == 0) + { + builtin_error ("%s: pgrp argument must be numeric", pgidstr); + return (EXECUTION_FAILURE); + } + if (pgid_arg < 0) + { + builtin_error ("%s: negative pgrp values not allowed", pgidstr); + return (EXECUTION_FAILURE); + } + pgid = pgid_arg; + + errno = 0; + if (setpgid(pid, pgid) < 0) + { + builtin_error("setpgid failed: %s", strerror (errno)); + return (EXECUTION_FAILURE); + } + return (EXECUTION_SUCCESS); +} + +const char *setpgid_doc[] = { + "invoke the setpgid(2) system call", + "", + "Arguments:", + " pid : numeric process identifier, >= 0", + " pgrpid: numeric process group identifier, >=0", + "See the setpgid(2) manual page.", + (const char *)NULL +}; + +struct builtin setpgid_struct = { + "setpgid", + setpgid_builtin, + BUILTIN_ENABLED, + (char **)setpgid_doc, + "setpgid pid pgrpid", + 0 +}; |