diff options
Diffstat (limited to 'usr.bin/nohup')
-rw-r--r-- | usr.bin/nohup/Makefile | 5 | ||||
-rw-r--r-- | usr.bin/nohup/nohup.1 | 90 | ||||
-rw-r--r-- | usr.bin/nohup/nohup.c | 117 |
3 files changed, 212 insertions, 0 deletions
diff --git a/usr.bin/nohup/Makefile b/usr.bin/nohup/Makefile new file mode 100644 index 0000000..c072a27 --- /dev/null +++ b/usr.bin/nohup/Makefile @@ -0,0 +1,5 @@ +# @(#)Makefile 8.1 (Berkeley) 6/6/93 + +PROG= nohup + +.include <bsd.prog.mk> diff --git a/usr.bin/nohup/nohup.1 b/usr.bin/nohup/nohup.1 new file mode 100644 index 0000000..d04e486 --- /dev/null +++ b/usr.bin/nohup/nohup.1 @@ -0,0 +1,90 @@ +.\" Copyright (c) 1989, 1990, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" This code is derived from software contributed to Berkeley by +.\" the Institute of Electrical and Electronics Engineers, Inc. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" @(#)nohup.1 8.1 (Berkeley) 6/6/93 +.\" +.Dd June 6, 1993 +.Dt NOHUP 1 +.Os +.Sh NAME +.Nm nohup +.Nd invoke a command immune to hangups +.Sh SYNOPSIS +.Nm nohup +.Ar command +.Op Ar arg ... +.Sh DESCRIPTION +The +.Nm nohup +utility invokes +.Ar command +with +its arguments +and at this time sets the signal +.Dv SIGHUP +to be ignored. The signal +.Dv SIGQUIT +may also be set +to be ignored. +If the standard output is a terminal, the standard output is +appended to the file +.Pa nohup.out +in the current directory. +If standard error is a terminal, it is directed to the same place +as the standard output. +.Pp +.Nm Nohup +exits 1 if an error occurs, otherwise the exit status is that of +.Ar command . +.Sh ENVIRONMENT +The following variable is utilized by +.Nm nohup . +.Bl -tag -width flag +.It Ev HOME +If the output file +.Pa nohup.out +cannot be created in the current directory, the +.Nm nohup +utility uses the directory named by +.Ev HOME +to create the file. +.El +.Sh SEE ALSO +.Xr signal 3 +.Sh STANDARDS +The +.Nm nohup +command is expected to be +.St -p1003.2 +compatible. diff --git a/usr.bin/nohup/nohup.c b/usr.bin/nohup/nohup.c new file mode 100644 index 0000000..d469a13 --- /dev/null +++ b/usr.bin/nohup/nohup.c @@ -0,0 +1,117 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char copyright[] = +"@(#) Copyright (c) 1989, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +static char sccsid[] = "@(#)nohup.c 8.1 (Berkeley) 6/6/93"; +#endif /* not lint */ + +#include <sys/param.h> +#include <sys/stat.h> + +#include <errno.h> +#include <fcntl.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +void dofile __P((void)); +void usage __P((void)); + +int +main(argc, argv) + int argc; + char *argv[]; +{ + if (argc < 2) + usage(); + + if (isatty(STDOUT_FILENO)) + dofile(); + if (isatty(STDERR_FILENO) && dup2(STDOUT_FILENO, STDERR_FILENO) == -1) { + /* may have just closed stderr */ + (void)fprintf(stdin, "nohup: %s\n", strerror(errno)); + exit(1); + } + + (void)signal(SIGHUP, SIG_IGN); + (void)signal(SIGQUIT, SIG_IGN); + + execvp(argv[1], &argv[1]); + (void)fprintf(stderr, + "nohup: %s: %s\n", argv[1], strerror(errno)); + exit(1); +} + +void +dofile() +{ + int fd; + char *p, path[MAXPATHLEN]; + +#define FILENAME "nohup.out" + p = FILENAME; + if ((fd = open(p, O_RDWR|O_CREAT, S_IRUSR | S_IWUSR)) >= 0) + goto dupit; + if (p = getenv("HOME")) { + (void)strcpy(path, p); + (void)strcat(path, "/"); + (void)strcat(path, FILENAME); + if ((fd = open(p = path, + O_RDWR|O_CREAT, S_IRUSR | S_IWUSR)) >= 0) + goto dupit; + } + (void)fprintf(stderr, "nohup: can't open a nohup.out file.\n"); + exit(1); + +dupit: (void)lseek(fd, (off_t)0, SEEK_END); + if (dup2(fd, STDOUT_FILENO) == -1) { + (void)fprintf(stderr, "nohup: %s\n", strerror(errno)); + exit(1); + } + (void)fprintf(stderr, "sending output to %s\n", p); +} + +void +usage() +{ + (void)fprintf(stderr, "usage: nohup command\n"); + exit(1); +} |