| 1 | /* -*- Mode: C; c-basic-offset:4 ; -*- */ |
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| 2 | /* |
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| 3 | * (C) 2008 by Argonne National Laboratory. |
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| 4 | * See COPYRIGHT in top-level directory. |
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| 5 | */ |
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| 6 | |
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| 7 | #include "hydra_utils.h" |
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| 8 | #include "bsci.h" |
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| 9 | #include "bscu.h" |
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| 10 | #include "rsh.h" |
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| 11 | |
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| 12 | /* |
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| 13 | * HYD_BSCD_rsh_launch_procs: For each process, we create an |
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| 14 | * executable which reads like "rsh exec args" and the list of |
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| 15 | * environment variables. We fork a worker process that sets the |
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| 16 | * environment and execvp's this executable. |
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| 17 | */ |
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| 18 | HYD_Status HYD_BSCD_rsh_launch_procs(char **global_args, const char *partition_id_str, |
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| 19 | struct HYD_Partition *partition_list) |
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| 20 | { |
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| 21 | struct HYD_Partition *partition; |
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| 22 | char *client_arg[HYD_NUM_TMP_STRINGS]; |
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| 23 | char *tmp[HYD_NUM_TMP_STRINGS], *path = NULL, *test_path = NULL; |
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| 24 | int i, arg, process_id; |
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| 25 | HYD_Status status = HYD_SUCCESS; |
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| 26 | |
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| 27 | HYDU_FUNC_ENTER(); |
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| 28 | |
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| 29 | /* |
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| 30 | * We use the following priority order for the executable path: |
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| 31 | * 1. User-specified |
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| 32 | * 2. Search in path |
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| 33 | * 3. Hard-coded location |
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| 34 | */ |
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| 35 | if (HYD_BSCI_info.bootstrap_exec) { |
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| 36 | path = HYDU_strdup(HYD_BSCI_info.bootstrap_exec); |
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| 37 | } |
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| 38 | else { |
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| 39 | status = HYDU_find_in_path("rsh", &test_path); |
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| 40 | HYDU_ERR_POP(status, "error while searching for executable in user path\n"); |
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| 41 | |
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| 42 | if (test_path) { |
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| 43 | tmp[0] = HYDU_strdup(test_path); |
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| 44 | tmp[1] = HYDU_strdup("rsh"); |
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| 45 | tmp[2] = NULL; |
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| 46 | |
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| 47 | status = HYDU_str_alloc_and_join(tmp, &path); |
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| 48 | HYDU_ERR_POP(status, "error joining strings\n"); |
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| 49 | |
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| 50 | HYDU_free_strlist(tmp); |
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| 51 | } |
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| 52 | else |
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| 53 | path = HYDU_strdup("/usr/bin/rsh"); |
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| 54 | } |
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| 55 | |
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| 56 | process_id = 0; |
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| 57 | FORALL_ACTIVE_PARTITIONS(partition, partition_list) { |
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| 58 | /* Setup the executable arguments */ |
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| 59 | arg = 0; |
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| 60 | client_arg[arg++] = HYDU_strdup(path); |
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| 61 | |
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| 62 | /* rsh does not support any partition names other than host names */ |
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| 63 | client_arg[arg++] = HYDU_strdup(partition->base->name); |
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| 64 | |
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| 65 | for (i = 0; global_args[i]; i++) |
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| 66 | client_arg[arg++] = HYDU_strdup(global_args[i]); |
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| 67 | |
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| 68 | if (partition_id_str) { |
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| 69 | client_arg[arg++] = HYDU_strdup(partition_id_str); |
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| 70 | client_arg[arg++] = HYDU_int_to_str(partition->base->partition_id); |
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| 71 | } |
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| 72 | |
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| 73 | client_arg[arg++] = NULL; |
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| 74 | |
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| 75 | if (HYD_BSCI_info.debug) { |
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| 76 | HYDU_Dump("Launching process: "); |
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| 77 | HYDU_print_strlist(client_arg); |
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| 78 | } |
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| 79 | |
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| 80 | /* The stdin pointer will be some value for process_id 0; for |
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| 81 | * everyone else, it's NULL. */ |
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| 82 | status = HYDU_create_process(client_arg, NULL, |
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| 83 | (process_id == 0 ? &partition->base->in : NULL), |
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| 84 | &partition->base->out, &partition->base->err, |
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| 85 | &partition->base->pid, -1); |
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| 86 | HYDU_ERR_POP(status, "create process returned error\n"); |
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| 87 | |
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| 88 | HYDU_free_strlist(client_arg); |
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| 89 | |
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| 90 | process_id++; |
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| 91 | } |
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| 92 | |
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| 93 | fn_exit: |
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| 94 | HYDU_FUNC_EXIT(); |
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| 95 | return status; |
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| 96 | |
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| 97 | fn_fail: |
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| 98 | goto fn_exit; |
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| 99 | } |
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