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authorMattias Andrée <maandree@operamail.com>2014-08-24 00:02:57 +0200
committerMattias Andrée <maandree@operamail.com>2014-08-24 00:02:57 +0200
commitf24b145599cd349e9e6895a136619a9837cfa385 (patch)
tree422ef7158202fc6864f13510434cacb07c03c71e
parentadd readme (diff)
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we got code
Signed-off-by: Mattias Andrée <maandree@operamail.com>
-rw-r--r--src/getpgrp.c28
-rw-r--r--src/setpgrp.c98
2 files changed, 126 insertions, 0 deletions
diff --git a/src/getpgrp.c b/src/getpgrp.c
new file mode 100644
index 0000000..47dafcf
--- /dev/null
+++ b/src/getpgrp.c
@@ -0,0 +1,28 @@
+/**
+ * setpgrep — run a program in a new process group
+ * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
+ *
+ * This program 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.
+ *
+ * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <unistd.h>
+#include <stdio.h>
+#include <stdint.h>
+
+
+int main(void)
+{
+ pid_t group = getpgrp();
+ return printf("%ji\n", (intmax_t)group) < 0;
+}
+
diff --git a/src/setpgrp.c b/src/setpgrp.c
new file mode 100644
index 0000000..e1f595e
--- /dev/null
+++ b/src/setpgrp.c
@@ -0,0 +1,98 @@
+/**
+ * setpgrep — run a program in a new process group
+ * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
+ *
+ * This program 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.
+ *
+ * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <unistd.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stddef.h>
+
+
+int main(int argc, char* argv[])
+{
+ int switch_print = 0;
+ int switch_export = 0;
+ int switch_help = 0;
+ pid_t group;
+ char** args;
+ size_t off;
+
+ for (off = 1; off < (size_t)argc; off++)
+ if (!strcmp(argv[off], "--print"))
+ switch_print = 1;
+ else if (!strcmp(argv[off], "--export"))
+ {
+ switch_export = ++off;
+ if (off == (size_t)argc)
+ goto help;
+ }
+ else if (!strcmp(argv[off], "--help"))
+ {
+ switch_help = 1;
+ goto help;
+ }
+ else if (!strcmp(argv[off], "--"))
+ {
+ off++;
+ break;
+ }
+ else if (argv[off][0] != '-')
+ break;
+ else
+ goto help;
+
+ group = setpgid(0, 0);
+ if (group == (pid_t)-1)
+ goto fail;
+ group = getpgrp();
+
+ args = malloc(argc * sizeof(char*));
+ if (args == NULL)
+ goto fail;
+
+ memcpy(args, argv + off, ((size_t)argc - off) * sizeof(char*));
+ args[argc - 1] = NULL;
+
+ if (switch_print)
+ if (printf("%ji\n", (intmax_t)group) < 0)
+ goto fail;
+
+ if (switch_export)
+ {
+ char group_str[3 * sizeof(pid_t) + 1];
+ if (sprintf(group_str, "%ji", (intmax_t)group) < 0)
+ goto fail;
+ if (setenv(argv[switch_export], group_str, 1) < 0)
+ goto fail;
+ }
+
+ execvp(args[0], args);
+
+ fail:
+ perror(*argv);
+ return 1;
+
+ help:
+ printf("USAGE: %s [options] [--] [command...]\n", *argv);
+ printf("\n");
+ printf(" --print Print the process group to stdout.\n");
+ printf(" --export VAR Export the process group to the ENV environment variable.\n");
+ printf("\n");
+ return !switch_help;
+}
+