From bc434511310a5bbbc5fe3783a9204b204ef05500 Mon Sep 17 00:00:00 2001 From: "kay.sievers@vrfy.org" Date: Fri, 21 Nov 2003 06:48:01 -0800 Subject: [PATCH] [PATCH] support arguments in callout exec here is argument support for CALLOUT exec: CALLOUT, PROGRAM="/bin/echo -n xxx", BUS="usb", ID="xxx", NAME="webcam%n" results in: Nov 20 02:35:20 pim udev[30422]: get_major_minor: found major = 81, minor = 0 Nov 20 02:35:20 pim udev[30422]: exec_callout: callout to /bin/echo -n xxx Nov 20 02:35:20 pim udev[30422]: exec_callout: callout returned 'xxx' Nov 20 02:35:20 pim udev[30422]: get_attr: kernel number appended: 0 The feature is really nice, but the maximum argument count is hard coded to 8. --- namedev.c | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/namedev.c b/namedev.c index 7c8761088..bed328f64 100644 --- a/namedev.c +++ b/namedev.c @@ -45,6 +45,7 @@ #define TYPE_TOPOLOGY "TOPOLOGY" #define TYPE_REPLACE "REPLACE" #define TYPE_CALLOUT "CALLOUT" +#define CALLOUT_MAXARG 8 static LIST_HEAD(config_device_list); @@ -479,6 +480,9 @@ static int exec_callout(struct config_device *dev, char *value, int len) pid_t pid; int value_set = 0; char buffer[256]; + char *arg; + char *args[CALLOUT_MAXARG]; + int i; dbg("callout to '%s'", dev->exec_program); retval = pipe(fds); @@ -496,7 +500,22 @@ static int exec_callout(struct config_device *dev, char *value, int len) /* child */ close(STDOUT_FILENO); dup(fds[1]); /* dup write side of pipe to STDOUT */ - retval = execve(dev->exec_program, main_argv, main_envp); + if (strchr(dev->exec_program, ' ')) { + /* callout with arguments */ + arg = dev->exec_program; + for (i=0; i < CALLOUT_MAXARG-1; i++) { + args[i] = strsep(&arg, " "); + if (args[i] == NULL) + break; + } + if (args[i]) { + dbg("to many args - %d", i); + args[i] = NULL; + } + retval = execve(args[0], args, main_envp); + } else { + retval = execve(dev->exec_program, main_argv, main_envp); + } if (retval != 0) { dbg("child execve failed"); exit(1); @@ -523,6 +542,7 @@ static int exec_callout(struct config_device *dev, char *value, int len) strncpy(value, buffer, len); } } + dbg("callout returned '%s'", value); close(fds[0]); res = wait(&status); if (res < 0) { -- 2.30.2