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Revision 1957, 2.1 kB
(checked in by ensc, 4 years ago)
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call write(2) through TEMP_FAILURE_RETRY()
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- Property svn:eol-style set to
native
- Property svn:keywords set to
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#ifdef HAVE_CONFIG_H |
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# include <config.h> |
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#endif |
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#include "command.h" |
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#include "util.h" |
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#include <unistd.h> |
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#include <fcntl.h> |
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#include <errno.h> |
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#include <assert.h> |
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static inline bool |
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initPipes(int p[2]) |
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{ |
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return (pipe(p)!=-1 && |
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fcntl(p[1], F_SETFD, FD_CLOEXEC)!=-1); |
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} |
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bool |
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Command_exec(struct Command *cmd, bool do_fork) |
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{ |
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int p[2]; |
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if (cmd->params_style_==parVEC) |
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Vector_zeroEnd(&cmd->params.v); |
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if (!do_fork) |
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cmd->pid = 0; |
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else if (!initPipes(p) || |
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(cmd->pid = fork())==-1) { |
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cmd->err = errno; |
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return false; |
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} |
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if (cmd->pid==0) { |
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char const ** argv = { 0 }; |
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if (do_fork) close(p[0]); |
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switch (cmd->params_style_) { |
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case parVEC : argv = cmd->params.v.data; break; |
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case parDATA : argv = cmd->params.d; break; |
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default : break; |
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} |
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execv(cmd->filename ? cmd->filename : argv[0], |
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reinterpret_cast(char **const)(argv)); |
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cmd->err = errno; |
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assert(cmd->err != 0); |
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if (do_fork) { |
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TEMP_FAILURE_RETRY(write(p[1], &cmd->err, sizeof(cmd->err))); |
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_exit(1); |
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} |
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} |
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else { |
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close(p[1]); |
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if (read(p[0], &cmd->err, sizeof(cmd->err))==0) |
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cmd->err = 0; |
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else |
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while (wait4(cmd->pid, 0,0,0)==-1 && |
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(errno==EINTR || errno==EAGAIN)) {}; |
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close(p[0]); |
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} |
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return cmd->err==0; |
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} |
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