50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2013.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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stdlib/system.c
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Execute a shell command.
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*******************************************************************************/
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#include <sys/wait.h>
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#include <stdlib.h>
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#include <unistd.h>
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int system(const char* command)
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{
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const int ret_error = command ? -1 : 0;
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const int exit_error = command ? 127 : 0;
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if ( !command )
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command = "exit 1";
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// TODO: Block SIGHCHLD, SIGINT, anda SIGQUIT while waiting.
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pid_t childpid = fork();
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if ( childpid < 0 )
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return ret_error;
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if ( childpid )
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{
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int status;
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if ( waitpid(childpid, &status, 0) < 0 )
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return ret_error;
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return status;
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}
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execlp("sh", "sh", "-c", command, NULL);
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_exit(exit_error);
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}
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